99_mybib.bib

@misc{cura,
  author = {{Ultimaker}},
  title = {Ultimaker Cura 4.2.1 software},
  url = {https://ultimaker.com/software/ultimaker-cura},
  version = {{4.2.1}},
  date = {2019-08-31},
  year = "2019",
}
@article{Liu2016CAD,
title = "Homogenization of material properties in additively manufactured structures",
journal = "Computer-Aided Design",
volume = "78",
pages = "71 - 82",
year = "2016",
COMMENTEDnote = "SPM 2016",
COMMENTEDissn = "0010-4485",
doi = "https://doi.org/10.1016/j.cad.2016.05.017",
COMMENTEDurl = "http://www.sciencedirect.com/science/article/pii/S0010448516300379",
author = "Xingchen Liu and Vadim Shapiro",
keywords = "Additive manufacturing, Fused deposition modeling, Printed model, Heterogeneous material, Homogenization",
abstract = "Additive manufacturing transforms material into three-dimensional parts incrementally, layer by layer or path by path. Subject to the build direction and machine resolution, an additively manufactured part deviates from its design model in terms of both geometry and mechanical performance. In particular, the material inside the fabricated part often exhibits spatially varying material distribution (heterogeneity) and direction dependent behavior (anisotropy), indicating that the design model is no longer a suitable surrogate to consistently estimate the mechanical performance of the printed component. We propose a new two-stage approach to modeling and estimating effective elastic properties of parts fabricated by fused deposition modeling (FDM) process. First, we construct an implicit representation of an effective mesoscale geometry–material model of the printed structure that captures the details of the particular process and published material information. This representation of mesoscale geometry and material of the printed structure is then homogenized at macro scale through a solution of an integral equation formulated using Green’s function. We show that the integral equation can be converted into a system of linear equations that is symmetric and positive definite and can be solved efficiently using conjugate gradient method and Fourier transform. The computed homogenized properties are validated by both finite element method and experiment results. The proposed two-stage approach can be used to estimate other effective material properties in a variety of additive manufacturing processes, whenever a similar effective mesoscale geometry–material model can be constructed."
}
@Article{Zegard2016SMO,
author="Zegard, Tom{\'a}s
and Paulino, Glaucio H.",
title="Bridging topology optimization and additive manufacturing",
journal="Structural and Multidisciplinary Optimization",
year="2016",
month="Jan",
day="01",
volume="53",
number="1",
pages="175--192",
abstract="Topology optimization is a technique that allows for increasingly efficient designs with minimal a priori decisions. Because of the complexity and intricacy of the solutions obtained, topology optimization was often constrained to research and theoretical studies. Additive manufacturing, a rapidly evolving field, fills the gap between topology optimization and application. Additive manufacturing has minimal limitations on the shape and complexity of the design, and is currently evolving towards new materials, higher precision and larger build sizes. Two topology optimization methods are addressed: the ground structure method and density-based topology optimization. The results obtained from these topology optimization methods require some degree of post-processing before they can be manufactured. A simple procedure is described by which output suitable for additive manufacturing can be generated. In this process, some inherent issues of the optimization technique may be magnified resulting in an unfeasible or bad product. In addition, this work aims to address some of these issues and propose methodologies by which they may be alleviated. The proposed framework has applications in a number of fields, with specific examples given from the fields of health, architecture and engineering. In addition, the generated output allows for simple communication, editing, and combination of the results into more complex designs. For the specific case of three-dimensional density-based topology optimization, a tool suitable for result inspection and generation of additive manufacturing output is also provided.",
issn="1615-1488",
doi="10.1007/s00158-015-1274-4",
COMMENTEDurl="https://doi.org/10.1007/s00158-015-1274-4"
}

@Article{Xiong2019,
author="Xiong, Yi
and Park, Sang-In
and Padmanathan, Suhasini
and Dharmawan, Audelia Gumarus
and Foong, Shaohui
and Rosen, David William
and Soh, Gim Song",
title="Process planning for adaptive contour parallel toolpath in additive manufacturing with variable bead width",
journal="The International Journal of Advanced Manufacturing Technology",
year="2019",
month="Jun",
day="11",
abstract="Lightweight structures with slender features and thin walls can be fabricated by the additive manufacturing process. The fabrication process utilizes a contour parallel toolpath, where sets of parallel contours are offset from the boundaries of a geometric structure at predefined intervals to deposit the material layer by layer. Currently, these intervals are set to be constant, which limits its capability to produce near net-shape parts. In recent research, the feasibility to fabricate parts using contour parallel toolpaths with variable bead widths has been explored to increase the production speed, to improve the geometry accuracy, and to manufacture void-free parts. However, existing process planning methods are computationally inefficient and challenging to implement. To resolve these issues, this paper proposes a comprehensive process planning framework for adaptive contour parallel toolpath with variable bead widths. More specifically, this framework includes a toolpath planning algorithm using the level-set method and a process planning algorithm for generating the desired bead geometry using a Gaussian process regression model. To validate the proposed framework, a case study has been demonstrated in the fabrication of benchmark features with a wire and arc additive manufacturing process.",
COMMENTEDissn="1433-3015",
doi="10.1007/s00170-019-03954-1",
COMMENTEDurl="https://doi.org/10.1007/s00170-019-03954-1"
}

@book{schaling2011boost,
  title={The boost C++ libraries},
  author={Sch{\"a}ling, Boris},
  year={2011},
  publisher={Boris Sch{\"a}ling}
}

@article{Han2002JMSE,
author = {Han , Wenbiao  and Jafari, Mohsen A.  and Danforth , Stephen C.  and Safari, Ahmad },
title = "{Tool Path-Based Deposition Planning in Fused Deposition Processes }",
journal = {Journal of Manufacturing Science and Engineering},
volume = {124},
number = {2},
pages = {462-472},
year = {2002},
month = {04},
abstract = "{The fabrication of a functional part requires very high layer quality in the Fused Deposition (FD) processes. The constant deposition flow rate currently used in FD technology cannot meet this requirement, due to the varying geometries of the layers. To achieve a high quality functional part, an overfill and underfill analysis is conducted. A deposition planning approach is proposed, which is based on a grouping and mapping algorithm. Two piezoelectric test parts have been built to demonstrate the effectiveness and feasibility of the proposed approach. }",
COMMENTEDissn = {1087-1357},
doi = {10.1115/1.1455026},
COMMENTEDurl = {https://doi.org/10.1115/1.1455026},
COMMENTEDeprint = {https://asmedigitalcollection.asme.org/manufacturingscience/article-pdf/124/2/462/4691900/462\_1.pdf}
}

@article{Abele2015,
abstract = {Purpose - This paper aims to develop a set of process parameters tailored for lattice structures and test them against standard process (SP) parameters. Selective laser melting (SLM) is a commonly known and established additive manufacturing technique and is a key technology in generating intricately shaped lattice structures. However, SP parameters used in this technology have building time and accuracy disadvantages for structures with a low area-to-perimeter ratio, such as thin struts. Design/methodology/approach - In this research work, body-centred cubic structure specimens are manufactured using adapted process parameters. Central to the adapted process parameters is the positioning of the laser beam, the scan strategy and the linear energy density. The specimens are analysed with X-ray micro-computed tomography for dimensional accuracy. The final assessment is a comparison between specimens manufactured using adapted process parameters and those using SP parameters. Findings - Standard parameters for lattice structures lead to a significant shift from the nominal geometry. An extensive manufacturing and computation time due to several exposure patterns (e.g. pre-contours, post-contours) was observed. The tailored process parameters developed had good dimensional accuracy, reproducible results and improved manufacturing performance. Research limitations/implications - The results are based on a distinctive geometry of the lattice structure and a specific material. Future research should be extended to other geometries and materials. Practical implications - Optimisation of process parameters for the part geometry is a critical factor in improving dimensional accuracy and performance of SLM processes. Originality/value - This study demonstrates how application-tailored process parameters can lead to superior performance and improved dimensional accuracy. The results can be transferred to other lattice structure designs and materials.},
author = {Abele, Eberhard and Stoffregen, Hanns A. and Klimkeit, Klaus and Hoche, Holger and Oechsner, Matthias},
doi = {10.1108/RPJ-10-2012-0096},
file = {:home/t.kuipers/Downloads/RPJ-10-2012-0096.pdf:pdf},
isbn = {1020120096},
COMMENTEDissn = {13552546},
journal = {Rapid Prototyping Journal},
keywords = {Additive manufacturing,Lattice structures,Micro-computed tomography,Process parameters,Selective laser melting},
number = {1},
pages = {117--127},
title = {{Optimisation of process parameters for lattice structures}},
volume = {21},
year = {2015}
}
@article{Abueidda2017,
abstract = {In this paper, three types of triply periodic minimal surfaces (TPMS) are utilized to create novel polymeric cellular materials (CM). The TPMS architectures considered are Schwarz Primitive, Schoen IWP, and Neovius. This work investigates experimentally and computationally mechanical properties of these three TPMS-CMs. 3D printing is used to fabricate these polymeric cellular materials and their base material. Their properties are tested to provide inputs and serve as validation for finite element modeling. Two finite deformation elastic/hyperelastic-viscoplastic constitutive models calibrated based on the mechanical response of the base material are used in the computational study of the TPMS-CMs. It is shown that the specimen size of the TPMS-CMs affect their mechanical properties. Moreover, the finite element results agree with the results obtained experimentally. The Neovius-CM and IWP-CM have a similar mechanical response, and it is found that they have higher stiffness and strength than the Primitive-CM.},
author = {Abueidda, Diab W. and Bakir, Mete and {Abu Al-Rub}, Rashid K. and Bergstr{\"{o}}m, J{\"{o}}rgen S. and Sobh, Nahil A. and Jasiuk, Iwona},
doi = {10.1016/j.matdes.2017.03.018},
file = {:home/t.kuipers/Downloads/abueidda2017.pdf:pdf},
COMMENTEDissn = {18734197},
journal = {Materials and Design},
keywords = {3D printing,Architectured materials,Finite element analysis,Mechanical testing,Polymeric cellular materials},
pages = {255--267},
publisher = {Elsevier},
title = {{Mechanical properties of 3D printed polymeric cellular materials with triply periodic minimal surface architectures}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.matdes.2017.03.018},
volume = {122},
year = {2017}
}
@article{Ahmed2007,
abstract = {The use of space filling curves for proximity-improving mappings is well known and has found many useful applications in parallel computing. Such curves permit a linear array to be mapped onto a 2D (respectively, 3D) structure such that points that are distance d apart in the linear array are distance O(d(1/2)) (O(d(1/3))) apart in the 2D (3D) array and vice versa. We extend the concept of space filling curves to space filling surfaces and show how these surfaces lead to mappings from 2D to 3D so that points at distance d 1 2 on the 2D surface are mapped to points at distance O(d(1/3)) in the 3D volume. Three classes of surfaces, associated respectively with the Peano curve, Sierpinski carpet, and the Hilbert curve, are presented. A methodology for using these surfaces to map from 2D to 3D is developed. These results permit efficient execution of 2D computations on processors interconnected in a 3D grid. The space filling surfaces proposed by us are the first such fractal objects to be formally defined and are thus also of intrinsic interest in the context of fractal geometry.},
author = {Ahmed, Masood and Bokhari, Shahid},
doi = {10.1109/TPDS.2007.1049},
file = {:home/t.kuipers/Downloads/Mapping with Space Filling Surfaces.pdf:pdf},
isbn = {1045-9219},
COMMENTEDissn = {10459219},
journal = {IEEE Transactions on Parallel and Distributed Systems},
keywords = {Fractals,Hilbert curve,Parallel computing,Peano curve,Sierpinski carpet,Space filling curves,Space filling surfaces},
number = {9},
pages = {1258--1269},
title = {{Mapping with space filling surfaces}},
volume = {18},
year = {2007}
}
@article{ahn2002anisotropic,
abstract = {Rapid Prototyping (RP) technologies provide the ability to fabricate initial prototypes from various model materials. Stratasys Fused Deposition Modeling (FDM) is a typical RP process that can fabricate prototypes out of ABS plastic. To predict the mechanical behavior of FDM parts, it is critical to understand the material properties of the raw FDM process material, and the effect that FDM build parameters have on anisotropic material properties. This paper characterizes the properties of ABS parts fabricated by the FDM 1650. Using a Design of Experiment (DOE) approach, the process parameters of FDM, such as raster orientation, air gap, bead width, color, and model temperature were examined. Tensile strengths and compressive strengths of directionally fabricated specimens were measured and compared with injection molded FDM ABS P400 material. For the FDM parts made with a 0.003 inch overlap between roads, the typical tensile strength ranged between 65 and 72 percent of the strength of injection molded ABS P400. The compressive strength ranged from 80 to 90 percent of the injection molded FDM ABS. Several build rules for designing FDM parts were formulated based on experimental results.},
author = {Ahn, Sung Hoon and Montero, Michael and Odell, Dan and Roundy, Shad and Wright, Paul K.},
doi = {10.1108/13552540210441166},
file = {:home/t.kuipers/Downloads/13552540210441166.pdf:pdf},
COMMENTEDissn = {13552546},
journal = {Rapid Prototyping Journal},
keywords = {Anisotropy,Fused deposition modeling,Rapid prototyping},
number = {4},
pages = {248--257},
title = {{Anisotropic material properties of fused deposition modeling ABS}},
volume = {8},
year = {2002}
}
@article{ajdari2012hierarchical,
abstract = {We investigated the mechanical behavior of two-dimensional hierarchical honeycomb structures using analytical, numerical and experimental methods. Hierarchical honeycombs were constructed by replacing every three-edge vertex of a regular hexagonal lattice with a smaller hexagon. Repeating this process builds a fractal-appearing structure. The resulting isotropic in-plane elastic properties (effective elastic modulus and Poisson's ratio) of this structure are controlled by the dimension ratios for different hierarchical orders. Hierarchical honeycombs of first and second order can be up to 2.0 and 3.5 times stiffer than regular honeycomb at the same mass (i.e., same overall average density). The Poisson's ratio varies from nearly 1.0 (when planar 'bulk' modulus is considerably greater than Young's modulus, so the structure acts 'incompressible' for most loadings) to 0.28, depending on the dimension ratios. The work provides insight into the role of structural organization and hierarchy in regulating the mechanical behavior of materials, and new opportunities for developing low-weight cellular structures with tailorable properties. {\textcopyright} 2012 Elsevier Ltd. All rights reserved.},
author = {Ajdari, Amin and Jahromi, Babak Haghpanah and Papadopoulos, Jim and Nayeb-Hashemi, Hamid and Vaziri, Ashkan},
doi = {10.1016/j.ijsolstr.2012.02.029},
file = {:home/t.kuipers/Downloads/1-s2.0-S0020768312000777-main.pdf:pdf},
isbn = {00207683},
COMMENTEDissn = {00207683},
journal = {International Journal of Solids and Structures},
keywords = {Cellular structures,Honeycombs,Structural hierarchy},
number = {11-12},
pages = {1413--1419},
publisher = {Elsevier Ltd},
title = {{Hierarchical honeycombs with tailorable properties}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.ijsolstr.2012.02.029},
volume = {49},
year = {2012}
}
@article{Ajdari2011,
abstract = {The in-plane dynamic crushing of two dimensional honeycombs with both regular hexagonal and irregular arrangements was investigated using detailed finite element models. The energy absorption of honeycombs made of a linear elastic-perfectly plastic material with constant and functionally graded density were estimated up to large crushing strains. Our numerical simulations showed three distinct crushing modes for honeycombs with a constant relative density: quasi-static, transition and dynamic. Moreover, irregular cellular structures showed to have energy absorption similar to their counterpart regular honeycombs of same relative density and mass. To study the dynamic crushing of functionally graded cellular structures, a density gradient in the direction of crushing was introduced in the computational models by a gradual change of the cell wall thickness. Decreasing the relative density in the direction of crushing was shown to enhance the energy absorption of honeycombs at early stages of crushing. The study provides new insight into the behavior of engineered and biological cellular materials, and could be used to develop novel energy absorbent structures. {\textcopyright} 2010 Elsevier Ltd. All rights reserved.},
author = {Ajdari, Amin and Nayeb-Hashemi, Hamid and Vaziri, Ashkan},
doi = {10.1016/j.ijsolstr.2010.10.018},
file = {:home/t.kuipers/Downloads/1-s2.0-S0020768310003720-main.pdf:pdf},
isbn = {00207683},
COMMENTEDissn = {00207683},
journal = {International Journal of Solids and Structures},
keywords = {Cellular structures,Energy absorption,Functionally graded material,Honeycombs},
number = {3-4},
pages = {506--516},
publisher = {Elsevier},
title = {{Dynamic crushing and energy absorption of regular, irregular and functionally graded cellular structures}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.ijsolstr.2010.10.018},
volume = {48},
year = {2011}
}
@incollection{akiyama2007infinite,
author = {Akiyama, Jin and Fukuda, Hiroshi and Ito, Hiro and Nakamura, Gisaku},
booktitle = {Discrete Geometry, Combinatorics and Graph Theory},
file = {:home/t.kuipers/Downloads/978-3-540-70666-3.pdf:pdf},
pages = {1--9},
publisher = {Springer},
title = {{Infinite series of generalized Gosper space filling curves}},
year = {2007}
}
@article{Al-Ketan2018,
abstract = {Recent advances in additive manufacturing facilitated the fabrication of parts with great geometrical complexity and relatively small size, and allowed for the fabrication of topologies that could not have been achieved using traditional fabrication techniques. In this work, we explore the topology-property relationship of several classes of periodic cellular materials; the first class is strut-based structures, while the second and third classes are derived from the mathematically created triply periodic minimal surfaces, namely; the skeletal-TPMS and sheet-TPMS cellular structures. Powder bed fusion technology was employed to fabricate the cellular structures of various relative densities out of Maraging steel. Scanning electron microscope (SEM) was also employed to assess the quality of the printed parts. Compressive testing was performed to deduce the mechanical properties of the considered cellular structures. Results showed that the sheet-TPMS based cellular structures exhibited a near stretching-dominated deformation behavior, while skeletal-TPMS showed a bending-dominated behavior. On the other hand, the Kelvin and Gibson-Ashby strut-based topologies exhibited a mixed mode of deformation while the Octet-truss showed a stretching-dominated behavior. Overall the sheet-TPMS based cellular structures showed superior mechanical properties among all the tested structures. The most interesting observation is that sheet-based Diamond TPMS structure showed the best mechanical performance with nearly independence of relative density. It was also observed that at decreased volume fractions the effect of geometry on the mechanical properties is more pronounced.},
author = {Al-Ketan, Oraib and Rowshan, Reza and {Abu Al-Rub}, Rashid K.},
doi = {10.1016/j.addma.2017.12.006},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860417303767-main.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Additive manufacturing (AM),Architected materials,Powder bed fusion,Selective laser sintering (SLS),Triply periodic minimal surfaces (TPMS)},
pages = {167--183},
publisher = {Elsevier B.V.},
title = {{Topology-mechanical property relationship of 3D printed strut, skeletal, and sheet based periodic metallic cellular materials}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.addma.2017.12.006},
volume = {19},
year = {2018}
}
@article{Alexa2017,
author = {Alexa, Marc and Hildebrand, Kristian and Lefebvre, Sylvain and Alexa, Marc and Hildebrand, Kristian and Lefebvre, Sylvain},
doi = {10.1145/2999536},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Alexa et al. - 2017 - Optimal Discrete Slicing.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {Computer numerical control,additive manufacturing,direct digital manufacturing,dynamic programming,slicing},
month = {jan},
number = {1},
pages = {1--16},
publisher = {ACM},
title = {{Optimal Discrete Slicing}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2996392.2999536},
volume = {36},
year = {2017}
}
@article{Amenta2001,
abstract = {The medial axis transform (or MAT) is a representation of an object as an infinite union of balls. We consider approximating the MAT of a three-dimensional object, and its complement, with a finite union of balls. Using this approximate MAT we define a new piecewise-linear approximation to the object surface, which we call the power crust. We assume that we are given as input a sufficiently dense sample of points from the object surface. We select a subset of the Voronoi balls of the sample, the polar balls, as the union of balls representation. We bound the geometric error of the union, and of the corresponding power crust, and show that both representations are topologically correct as well. Thus, our results provide a new algorithm for surface reconstruction from sample points. By construction, the power crust is always the boundary of a polyhedral solid, so we avoid the polygonization, hole-filling or manifold extraction steps used in previous algorithms. The union of balls representation and the power crust have corresponding piecewise-linear dual representations, which in some sense approximate the medial axis. We show a geometric relationship between these duals and the medial axis by proving that, as the sampling density goes to infinity, the set of poles, the centers of the polar balls, converges to the medial axis. {\textcopyright} 2001 Elsevier Science B.V.},
author = {Amenta, Nina and Choi, Sunghee and Kolluri, Ravi Krishna},
doi = {10.1016/S0925-7721(01)00017-7},
file = {:home/t.kuipers/Downloads/1-s2.0-S0925772101000177-main.pdf:pdf},
COMMENTEDissn = {09257721},
journal = {Computational Geometry: Theory and Applications},
keywords = {Medial axis,Power diagram,Surface reconstruction},
number = {2-3},
pages = {127--153},
title = {{The power crust, unions of balls, and the medial axis transform}},
volume = {19},
year = {2001}
}
@article{ISI:000287865000001,
author = {Andreassen, Erik and Clausen, Anders and Schevenels, Mattias and Lazarov, Boyan S and Sigmund, Ole},
doi = {10.1007/s00158-010-0594-7},
COMMENTEDissn = {1615-147X},
journal = {STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION},
month = {jan},
number = {1},
pages = {1--16},
title = {{Efficient topology optimization in MATLAB using 88 lines of code}},
volume = {43},
year = {2011}
}
@article{Antolin2019,
author = {Antolin, Pablo and Buffa, Annalisa and Cohen, Elaine and Dannenhoffer, John F. and Elber, Gershon and Elgeti, Stefanie and Haimes, Robert and Riesenfeld, Richard},
doi = {10.1016/j.cad.2019.05.020},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448519301939-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
pages = {23--33},
publisher = {Elsevier},
title = {{Optimizing Micro-Tiles in Micro-Structures as a Design Paradigm}},
COMMENTEDurl = {https://doi.org/10.1016/j.cad.2019.05.020},
volume = {115},
year = {2019}
}
@article{aremu2017voxelbased,
abstract = {Additive Manufacturing (AM) enables the production of geometrically complex parts that are difficult to manufacture by other means. However, conventional CAD systems are limited in the representation of such parts. This issue is exacerbated when lattice structures are combined or embedded within a complex geometry. This paper presents a computationally efficient, voxel-based method of generating lattices comprised of practically any cell type that can conform to an arbitrary external geometry. The method of conforming involves the tessellation and trimming of unit cells that can leave ‘hanging' struts at the surface, which is a possible point of weakness in the structure. A method of joining these struts to form an external two dimensional lattice, termed a ‘net-skin' is also described. Traditional methods of manufacturing lattice structures generally do not allow variation of cell properties within a structure; however, additive manufacturing enables graded lattices to be generated that are potentially more optimal. A method of functionally grading lattices is, therefore, also described to take advantage of this manufacturing capability.},
author = {Aremu, A. O. and Brennan-Craddock, J. P.J. and Panesar, A. and Ashcroft, I. A. and Hague, R. J.M. and Wildman, R. D. and Tuck, C.},
doi = {10.1016/j.addma.2016.10.006},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860416302810-main.pdf:pdf},
isbn = {2214-8604},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Functional grading,Lattice,Net-skin,Tesselation,Voxel},
pages = {1--13},
publisher = {Elsevier B.V.},
title = {{A voxel-based method of constructing and skinning conformal and functionally graded lattice structures suitable for additive manufacturing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.addma.2016.10.006},
volume = {13},
year = {2017}
}
@article{Armillotta2017a,
abstract = {Purpose To discuss the problem of the geometric accuracy of edges in parts manufactured by the FDM process, as a preliminary step for an experimental investigation. Design/methodology/approach Three geometric variables (inclination, included and incidence angle) were defined for an edge. The influence of each variable on the geometric errors was explained with reference to specific causes related to physical phenomena and process constraints. Findings Occurrence conditions for all causes were determined and visualized in a process map, which was also developed into a software procedure for the diagnosis of quality issues on digital models of the parts. Research limitations/implications The process map was developed by only empirical considerations and does not allow to predict the amount of geometric errors. In the second part of the paper, experimental tests will help to extend and validate the prediction criteria. Practical implications As demonstrated by an example, the results allow to predict the occurrence of visible defects on the edges of a part before manufacturing it with a given build orientation. Originality/value In literature, the geometric accuracy of additively manufactured parts is only related to surface features. The paper shows that the quality of edges depends on additional variables and causes to be carefully controlled by process choices.},
author = {Armillotta, Antonio and Cavallaro, Marco},
doi = {10.1108/RPJ-02-2016-0020},
file = {:home/t.kuipers/Downloads/armillotta2017.pdf:pdf},
isbn = {0320160033},
COMMENTEDissn = {1355-2546},
journal = {Rapid Prototyping Journal},
number = {1},
pages = {5--6},
title = {{Edge quality in Fused Deposition Modeling: I. Definition and analysis}},
COMMENTEDurl = {http://www.emeraldinsight.com/doi/10.1108/RPJ-02-2016-0020 http://www.scopus.com/inward/record.COMMENTEDurl?eid=2-s2.0-1142265504{\&}partnerID=40{\&}md5=4562996a479532d09ee160c395a3956f},
volume = {10},
year = {2017}
}
@article{Arndt2016,
abstract = {We describe a search for plane-filling curves traversing all edges of a grid once. The curves are given by Lindenmayer systems with only one non-constant letter. All such curves for small orders on three grids have been found. For all uniform grids we show how curves traversing all points once can be obtained from the curves found. Curves traversing all edges once are described for the four uniform grids where they exist.},
archivePrefix = {arXiv},
arxivId = {1607.02433},
author = {Arndt, J{\"{o}}rg},
COMMENTEDeprint = {1607.02433},
file = {:home/t.kuipers/Downloads/arndt-curve-search-2016.07.08.pdf:pdf},
journal = {arXiv preprint arXiv:1607.02433},
pages = {1--73},
title = {{Plane-filling curves on all uniform grids}},
COMMENTEDurl = {http://arxiv.org/abs/1607.02433},
year = {2016}
}
@article{Arora2019,
author = {Arora, Rahul and Jacobson, Alec and Langlois, Timothy R and Mueller, Caitlin and Shamir, Ariel and Levin, David I W},
file = {:home/t.kuipers/Downloads/volumetric{\_}michell{\_}truss{\_}scf19{\_}arora{\_}et{\_}al{\_}lowres.pdf:pdf},
isbn = {9781450367950},
title = {{Volumetric Michell Trusses for Parametric Design {\&} Fabrication}},
year = {2019}
}
@article{ashby2006properties,
abstract = {Man and nature both exploit the remarkable properties of cellular solids, by which we mean foams, meshes and microlattices. To the non-scientist, their image is that of soft, compliant, things: cushions, packaging and padding. To the food scientist they are familiar as bread, cake and desserts of the best kind: meringue, mousse and sponge. To those who study nature they are the structural materials of their subject: wood, coral, cancellous bone. And to the engineer they are of vast importance in building lightweight structures, for energy management, for thermal insulation, filtration and much more. When a solid is converted into a material with a foam-like structure, the single-valued properties of the solid are extended. By properties we mean stiffness, strength, thermal conductivity and diffusivity, electrical resistivity and so forth. And the extension is vast-the properties can be changed by a factor of 1000 or more. Perhaps the most important concept in analysing the mechanical behaviour is that of the distinction between a stretch- and a bending-dominated structure. The first is exceptionally stiff and strong for a given mass; the second is compliant and, although not strong, it absorbs energy well when compressed. This paper summarizes a little of the way in which the mechanical properties of cellular solids are analysed and illustrates the range of properties offered by alternative configurations.},
author = {Ashby, M. F.},
doi = {10.1098/rsta.2005.1678},
file = {:home/t.kuipers/Downloads/25190170.pdf:pdf},
isbn = {1364-503X},
COMMENTEDissn = {1364503X},
journal = {Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences},
keywords = {Foams,Lattice structures,Mechanical properties,Modelling},
number = {1838},
pages = {15--30},
pmid = {18272451},
title = {{The properties of foams and lattices}},
volume = {364},
year = {2006}
}
@inproceedings{attali1996modeling,
author = {Attali, Dominique and Montanvert, Annick},
booktitle = {Proceedings of 3rd IEEE International Conference on Image Processing},
file = {:home/t.kuipers/Downloads/00560357.pdf:pdf},
COMMENTEDisbn = {078033258X},
doi={10.1109/ICIP.1996.560357},
organization = {IEEE},
pages = {13--16},
title = {{Modeling noise for a better simplification of skeletons}},
volume = {3},
year = {1996}
}
@article{attene2018design,
abstract = {Abstract The wide diffusion of 3D printing technologies continuously calls for effective solutions for designing and fabricating objects of increasing complexity. The so called "computational fabrication" pipeline comprises all the steps necessary to turn a design idea into a physical object, and this book describes the most recent advancements in the two fundamental phases along this pipeline: design and process planning. We examine recent systems in the computer graphics community that allow us to take a design idea from conception to a digital model, and classify algorithms that are necessary to turn such a digital model into an appropriate sequence of machining instructions. Table of Contents: Acknowledgments / Introduction / Practices and Considerations for Additive Manufacturing / Design for Additive Manufacturing / Process Planning / Open Challenges / Bibliography / Authors' Biographies},
author = {Attene, Marco and Livesu, Marco and Lefebvre, Sylvain and Funkhouser, Thomas and Rusinkiewicz, Szymon and Ellero, Stefano and Mart$\backslash$'$\backslash$inez, Jon{\`{a}}s and Bermano, Amit Haim},
doi = {10.2200/S00847ED1V01Y201804VCP031},
file = {:home/t.kuipers/Downloads/Design, Representations, and Processing for Additive Manufacturing.pdf:pdf},
isbn = {9781681733555},
COMMENTEDissn = {2469-4215},
journal = {Synthesis Lectures on Visual Computing: Computer Graphics, Animation, Computational Photography, and Imaging},
keywords = {3D printing,geometric modeling,geometry processing},
month = {jun},
number = {2},
pages = {1--146},
publisher = {Morgan {\&} Claypool Publishers},
title = {{Design, Representations, and Processing for Additive Manufacturing}},
COMMENTEDurl = {https://www.morganclaypool.com/doi/10.2200/S00847ED1V01Y201804VCP031},
volume = {10},
year = {2018}
}
@article{avalle2001characterization,
abstract = {The mechanical properties at room temperature of three polymeric foams (namely EPP, PUR and PS/PA foams) have been experimentally evaluated in both static and impact loading conditions. The energy absorption characteristics have been examined both through the energy-absorption diagram method and through the efficiency diagram method. The meaning of the efficiency parameter, already used in the literature, has been explained in a proper, satisfactory way. It is shown that the maximum of the efficiency identifies the condition for optimal energy absorption of the foam, while the maximum stress reaches a value limited through other design considerations. The efficiency diagram method is then used to obtain synthetic diagrams useful to characterize the material and to help the design of energy absorbing components. These synthetic selection diagrams are obtained for the three tested materials. Finally, some consideration are drawn comparing the mechanical performance of the three considered types of foams and their dependency on density. {\textcopyright} 2001 Elsevier Science Ltd.},
author = {Avalle, M. and Belingardi, G. and Montanini, R.},
doi = {10.1016/S0734-743X(00)00060-9},
file = {:home/t.kuipers/Downloads/1-s2.0-S0734743X00000609-main.pdf:pdf},
isbn = {0734-743X},
COMMENTEDissn = {0734743X},
journal = {International Journal of Impact Engineering},
number = {5},
pages = {455--472},
title = {{Characterization of polymeric structural foams under compressive impact loading by means of energy-absorption diagram}},
volume = {25},
year = {2001}
}
@article{Bader2008,
author = {Bader, M. and Schraufstetter, S. and Vigh, C.A. and Behrens, J.},
doi = {10.1504/IJCSE.2008.021108},
file = {:home/t.kuipers/Downloads/Bad2008a.pdf:pdf},
COMMENTEDissn = {1742-7185, 1742-7193},
journal = {International Journal of Computational Science and Engineering},
keywords = {2008,a,adaptive grid generation,and behrens,bader,c,cache efficiency,computational science and engineering,curves,follows,generation and implementation of,int,j,m,memory efficient adaptive mesh,multigrid algorithms using sierpinski,reference to this paper,s,schraufstetter,should be made as,simulation,space-filling curves,vigh},
number = {1},
pages = {12},
title = {{Memory efficient adaptive mesh generation and implementation of multigrid algorithms using Sierpinski curves}},
COMMENTEDurl = {http://www.inderscience.com/link.php?id=21108},
volume = {4},
year = {2008}
}
@book{bader2012space,
author = {Bader, Michael},
doi = {10.1007/978-3-642-31046-1},
isbn = {978-3-642-31046-1},
publisher = {Springer Science {\&} Business Media},
title = {{Space filling curves: An introduction with applications in scientific computing}},
COMMENTEDurl = {www.space-filling-curves.org},
volume = {9},
year = {2013}
}
@article{bates2018compressive,
abstract = {Fused filament fabrication of thermoplastic polyurethanes (TPUs) offers a capability to manufacture tailorable, flexible honeycomb structures which can be optimised for energy absorbing applications. This work explores the effect of a range of grading methodologies on the energy absorbing and damping behaviour of flexible TPU honeycomb structures. By applying density grading, the energy absorbing and damping profiles are significantly modified from the uniform density equivalent. A 3D-printing procedure was developed which allowed the manufacture of high-quality structures, which underwent cyclic loading to densification without failure. Graded honeycomb architectures had an average relative density of 0.375 ± 0.05. After quasi-static testing, arrays were subjected to sinusoidal compression over a range of amplitudes at 0.5 Hz. By grading the structural density in different ways, mechanical damping was modified. Cyclic compressive testing also showed how strain-softening of the TPU parent material could lead to reduced damping over the course of 50 cycles. Samples were subjected to impact loading at strain-rates of up to 51 s-1 and specific impact energies of up to 270 mJ/cm3. Lower peak loads were transferred for graded samples for the most severe impact cases. This behaviour reveals the potential of density grading of TPU structures to provide superior impact protection in extreme environmental conditions.},
author = {Bates, Simon R.G. and Farrow, Ian R. and Trask, Richard S.},
doi = {10.1016/j.matdes.2018.11.019},
file = {:home/t.kuipers/Downloads/1-s2.0-S0264127518308256-main.pdf:pdf},
COMMENTEDissn = {02641275},
journal = {Materials {\&} Design},
keywords = {Additive manufacturing,Cellular structures,Functional grading,Thermoplastic polyurethane,additive manufacturing},
pages = {130--142},
publisher = {The Authors.},
title = {{Compressive behaviour of 3D printed thermoplastic polyurethane honeycombs with graded densities}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S0264127518308256},
volume = {162},
year = {2018}
}
@article{Behandish2019a,
abstract = {Additive manufacturing (AM) enables enormous freedom for design of complex structures. However, the process-dependent limitations that result in discrepancies between as-designed and as-manufactured shapes are not fully understood. The tradeoffs between infinitely many different ways to approximate a design by a manufacturable replica are even harder to characterize. To support design for AM (DfAM), one has to quantify local discrepancies introduced by AM processes, identify the detrimental deviations (if any) to the original design intent, and prescribe modifications to the design and/or process parameters to countervail their effects. Our focus in this work will be on topological analysis. There is ample evidence in many applications that preserving local topology (e.g., connectivity of beams in a lattice) is important even when slight geometric deviations can be tolerated. We first present a generic method to characterize local topological discrepancies due to material under- and over-deposition in AM, and show how it captures various types of defects in the as-manufactured structures. We use this information to systematically modify the as-manufactured outcomes within the limitations of available 3D printer resolution(s), which often comes at the expense of introducing more geometric deviations (e.g., thickening a beam to avoid disconnection). We validate the effectiveness of the method on 3D examples with nontrivial topologies such as lattice structures and foams.},
archivePrefix = {arXiv},
arxivId = {1904.13210},
author = {Behandish, Morad and Mirzendehdel, Amir M. and Nelaturi, Saigopal},
doi = {10.1016/j.cad.2019.05.032},
COMMENTEDeprint = {1904.13210},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448519302131-main.pdf:pdf;:home/t.kuipers/Downloads/1904.13210.pdf:pdf},
COMMENTEDissn = {0010-4485},
journal = {Computer-Aided Design},
keywords = {,3d printing,additive manufacturing,betti numbers,euler characteristic,topological analysis},
publisher = {Elsevier},
title = {{A Classification of Topological Discrepancies in Additive Manufacturing}},
COMMENTEDurl = {http://arxiv.org/abs/1904.13210},
year = {2019}
}
@article{Bermano2017,
abstract = {Computational manufacturing technologies such as 3D printing hold the potential for creating objects with previously undreamed-of combinations of functionality and physical properties. Human designers, however, typically cannot exploit the full geometric (and often material) complexity of which these devices are capable. This STAR examines recent systems devel-oped by the computer graphics community in which designers specify higher-level goals ranging from structural integrity and deformation to appearance and aesthetics, with the final detailed shape and manufacturing instructions emerging as the result of computation. It summarizes frameworks for interaction, simulation, and optimization, as well as documents the range of general objectives and domain-specific goals that have been considered. An important unifying thread in this analysis is that different underlying geometric and physical representations are necessary for different tasks: we document over a dozen classes of representations that have been used for fabrication-aware design in the literature. We analyze how these classes possess obvious advantages for some needs, but have also been used in creative manners to facilitate unexpected problem solutions.},
author = {Bermano, Amit H. and Funkhouser, Thomas and Rusinkiewicz, Szymon},
doi = {10.1111/cgf.13146},
file = {:home/t.kuipers/Downloads/v36i2pp509-535.compressed.pdf:pdf},
COMMENTEDissn = {14678659},
journal = {Computer Graphics Forum},
keywords = {Categories and Subject Descriptors (according to A,I.3.5 [Computer Graphics]: Computational Geometry,J.6 [Computer-Aided Engineering]},
number = {2},
pages = {509--535},
title = {{State of the Art in Methods and Representations for Fabrication-Aware Design}},
volume = {36},
year = {2017}
}
@inproceedings{ISI:000082420400028,
annote = {9th Solid Freeform Fabrication (SFF) Symposium, UNIV TEXAS, AUSTIN, TX,
AUG 10-12, 1998},
author = {Bertoldi, M and Yardimci, M a and Pistor, C M and Giiveri, S I},
booktitle = {Proceeeding of the 1998 Solid Fabrication Symposium},
editor = {{Marcus, HL and Beaman, JJ and Bourell, DL and Barlow, JW and Crawford}, RH},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Bertoldi et al. - 1998 - Domain decomposition and space filling curves in toolpath planning and generation.pdf:pdf},
COMMENTEDissn = {1053-2153},
pages = {267--276},
series = {Solid Freeform Fabrication Proceedings},
title = {{Domain Decomposition and Space Filling Curves in Toolpath Planning and Generation}},
year = {1998}
}
@inproceedings{ISI:000082420400074,
annote = {9th Solid Freeform Fabrication (SFF) Symposium, UNIV TEXAS, AUSTIN, TX,
AUG 10-12, 1998},
author = {Bertoldi, M and Yardimci, M A and Pistor, C M and Guceri, S I and Danforth, S C},
booktitle = {SOLID FREEFORM FABRICATION PROCEEDINGS, AUGUST, 1998},
editor = {{Marcus, HL and Beaman, JJ and Bourell, DL and Barlow, JW and Crawford, RH}},
COMMENTEDissn = {1053-2153},
pages = {639--650},
series = {SOLID FREEFORM FABRICATION PROCEEDINGS (SERIES)},
title = {{Generation of porous structures using fused deposition}},
year = {1998}
}
@article{Bickel2010,
abstract = {This paper introduces a data-driven process for designing and fab- ricating materials with desired deformation behavior. Our process starts with measuring deformation properties of base materials. For each base material we acquire a set of example deformations, and we represent the material as a non-linear stress-strain relationship in a finite-element model. We have validated our material measure- ment process by comparing simulations of arbitrary stacks of base materials with measured deformations of fabricated material stacks. After material measurement, our process continues with designing stacked layers of base materials. We introduce an optimization pro- cess that finds the best combination of stacked layers that meets a user's criteria specified by example deformations. Our algorithm employs a number of strategies to prune poor solutions from the combinatorial search space. We demonstrate the complete process by designing and fabricating objects with complex heterogeneous materials using modern multi-material 3D printers},
archivePrefix = {arXiv},
arxivId = {1211.6396},
author = {Bickel, Bernd and B{\"{a}}cher, Moritz and Otaduy, Miguel A. and Lee, Hyunho Richard and Pfister, Hanspeter and Gross, Markus and Matusik, Wojciech},
doi = {10.1145/1833351.1778800},
COMMENTEDeprint = {1211.6396},
file = {:home/t.kuipers/Downloads/a63-bickel.pdf:pdf},
isbn = {9781450302104},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {deformable objects,fabrication,goal-based material},
number = {4},
pages = {1},
pmid = {22899377},
title = {{Design and fabrication of materials with desired deformation behavior}},
COMMENTEDurl = {http://portal.acm.org/citation.cfm?doid=1833351.1778800},
volume = {29},
year = {2010}
}
@article{blum1967transformation,
title={A transformation for extracting new descriptors of shape},
author={Blum, Harry and others},
journal={Models for the perception of speech and visual form},
volume={19},
number={5},
pages={362--380},
year={1967}
}
@article{Bosch2008,
author = {Bosch, Robert},
file = {:home/t.kuipers/Downloads/bridges2008-235.pdf:pdf},
journal = {Proc. Bridges},
number = {c},
pages = {235--242},
title = {{Connecting the Dots : The Ins and Outs of TSP Art}},
year = {2008}
}
@article{Boschetto2016,
abstract = {Fused Deposition Modeling is one of the earliest types of Additive Manufacturing technologies. In this process a physical object is fabricated directly from a Computer-Aided Design model using layer-by-layer extrusion of a feedstock plastic filament material through a nozzle. It was originally developed for design and functional prototype applications but, in the last decade, gained considerable recognition and adoption in industry due to the process simplicity, affordability, and ability to make parts in a range of common engineering thermoplastics. Thus Fused Deposition Modeling products must comply with tolerance and roughness requirements in order to satisfy a mechanical coupling or functionality. This work strives to develop an integrated methodology able to help the process design with the aim to goal the requirements. This method allows knowing in advance the surface quality of the Fused Deposition Modeling product at chosen process parameters. This way an ex ante product check is possible. Moreover the methodology can find the set of solutions when the requirements are prescribed on the product features: it is possible to define the technology capability and analyze the proposed fabrication conditions. This methodology is highly useful in process management also in conjunction with other operations and can help the computer aided process planning since it can predict admissible scenarios.},
author = {Boschetto, Alberto and Bottini, Luana and Veniali, Francesco},
doi = {10.1016/j.addma.2016.05.008},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860416300926-main.pdf:pdf},
isbn = {2214-8604},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Accuracy prediction,Additive manufacturing,Fused deposition modeling,Roughness prediction},
pages = {334--344},
publisher = {Elsevier B.V.},
title = {{Integration of FDM surface quality modeling with process design}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.addma.2016.05.008},
volume = {12},
year = {2016}
}
@article{Brackett2011,
abstract = {This paper gives an overview of the issues and opportunities for the application of topology optimization methods for additive manufacturing (AM). The main analysis issues discussed are: how to achieve the maximum geometric resolution to allow the fine features easily manufacturable by AM to be represented in the optimization model; the manufacturing constraints to be considered, and the workflow modifications required to handle the geometric complexity in the post optimization stages. The main manufacturing issues discussed are the potential for realizing intermediate density regions, in the case of the solid isotropic material with penalization (SIMP) approach, the use of small scale lattice structures, the use of multiple material AM processes, and an approach to including support structure requirement as a manufacturing constraint. Introduction},
archivePrefix = {arXiv},
arxivId = {arXiv:1011.1669v3},
author = {Brackett, D and Ashcroft, I and Hague, R},
doi = {10.1017/CBO9781107415324.004},
COMMENTEDeprint = {arXiv:1011.1669v3},
isbn = {9788578110796},
COMMENTEDissn = {1098-6596},
journal = {Solid Freeform Fabrication Symposium},
pages = {348--362},
pmid = {25246403},
title = {{Topology optimization for additive manufacturing}},
year = {2011}
}
@misc{linadvance,
annote = {(accessed April, 2017)},
author = {Br{\'{a}}zio, Joao},
title = {{Linear Advance extrusion algorithm}},
COMMENTEDurl = {marlinfw.org/docs/features/lin{\_}advance.html},
year = {2016}
}
@article{Brunton2015,
abstract = {The facial performance of an individual is inherently rich in subtle deformation and timing details. Although these subtleties make the performance realistic and compelling, they often elude both motion capture and hand animation. We present a technique for adding fine-scale details and expressive- ness to low-resolution art-directed facial performances, such as those created manually using a rig, via marker-based capture, by fitting a morphable model to a video, or through Kinect reconstruction using recent faceshift technology. We employ a high-resolution facial performance capture system to acquire a representative performance of an individual in which he or she explores the full range of facial expressiveness. From the captured data, our system extracts an expressiveness model that encodes subtle spatial and temporal deformation details specific to that particular individual. Once this model has been built, these details can be transferred to low-resolution art-directed performances. We demonstrate results on various forms of input; after our enhancement, the resulting animations exhibit the same nuances and fine spatial details as the captured performance, with optional temporal enhancement to match the dynamics of the actor. Finally, we show that our technique outperforms the current state-of-the-art in example-based facial animation.},
author = {Brunton, A and Arikan, C A and Urban, P},
journal = {ACM Transactions on Graphics (TOG)},
number = {1},
pages = {4},
title = {{Pushing the limits of 3d color printing: Error diffusion with translucent materials.}},
volume = {35},
year = {2015}
}
@article{Brunton2018,
annote = {translucency from a humen perception perspective

translucency as a surface property

RGBA textured obj},
author = {Brunton, Alan and Arikan, Can Ates and Tanksale, Tejas Madan and Urban, Philipp},
doi = {10.1145/3197517.3201349},
file = {:home/t.kuipers/Downloads/a157-brunton.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,color,distance field,metamerism,translucency},
number = {4},
pages = {1--13},
title = {{3D printing spatially varying color and translucency}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=3197517.3201349},
volume = {37},
year = {2018}
}
@inproceedings{ISI:000390036200051,
annote = {5th CIRP Global Web Conference - Research and Innovation for Future
Production (CIRPe), Patras, GREECE, OCT 04-06, 2016},
author = {Busachi, Alessandro and Erkoyuncu, John and Colegrove, Paul and Drake, Richard and Watts, Chris and Martina, Filomeno},
booktitle = {5TH CIRP GLOBAL WEB CONFERENCE - RESEARCH AND INNOVATION FOR FUTURE PRODUCTION (CIRPE 2016)},
doi = {10.1016/j.procir.2016.08.029},
editor = {{Alexopoulos, K}},
COMMENTEDissn = {2212-8271},
pages = {302--307},
series = {Procedia CIRP},
title = {{``Defining Next-Generation Additive Manufacturing Applications for the Ministry of Defence (MoD){\{}''{\}}}},
volume = {55},
year = {2016}
}
@article{Cabiddu,
archivePrefix = {arXiv},
arxivId = {arXiv:1904.10213v1},
author = {Cabiddu, Daniela and Imati, C N R and Attene, Marco and Imati, C N R and Livesu, Marco and Imati, C N R},
COMMENTEDeprint = {arXiv:1904.10213v1},
file = {:home/t.kuipers/Downloads/1904.10213.pdf:pdf},
number = {0},
title = {{Surface2Volume : Surface Segmentation Conforming Assemblable Volumetric Partition}},
volume = {0}
}
@article{Cadman2013,
abstract = {The design of periodic microstructural com- posite materials to achieve specific properties has been a major area of interest in material research. Tailoring dif- ferent physical properties by modifying the microstructural architecture in unit cells is one of the main concerns in exploring and developing novel multi-functional cellular composites and has led to the development of a large variety of mathematical models, theories and methodologies for improving the performance of such materials. This paper provides a critical review on the state-of-the-art advances in the design of periodic microstructures of multi-functional materials for a range of physical properties, such as elastic stiffness, Poisson's ratio, thermal expansion coefficient, conductivity, fluidic permeability, particle diffusivity, electrical permittivity and magnetic permeability, etc.},
author = {Cadman, Joseph E. and Zhou, Shiwei and Chen, Yuhang and Li, Qing},
doi = {10.1007/s10853-012-6643-4},
file = {:home/t.kuipers/Downloads/Cadman2013{\_}Article{\_}OnDesignOfMulti-functionalMicr.pdf:pdf},
isbn = {0022-2461 1573-4803},
COMMENTEDissn = {00222461},
journal = {Journal of Materials Science},
number = {1},
pages = {51--66},
title = {{On design of multi-functional microstructural materials}},
volume = {48},
year = {2013}
}
@article{Chakraborty2008,
author = {Chakraborty, D and Reddy, B A and Choudhury, A R},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {fused deposition modeling,layered manufacturing,rapid prototyping,skull bone},
number = {2},
pages = {235--243},
title = {{Extruder path generation for Curved Layer Fused Deposition Modeling}},
volume = {40},
year = {2008}
}
@article{chazelle1984,
abstract = {This paper describes a new method for triangulating a simple n-sided polygon. The algorithm runs in time O(n log s), with s {\_}{\textless} n. The quantity s measures the sinuosity of the polygon, that is, the number of times the boundary alternates between complete spirals of opposite orientation. The value of s is in practice a very small constant, even for extremely winding polygons. Our algorithm is the first method whose performance is linear in the number of vertices, up to within a factor that depends only on the shape-complexity of the polygon. Informally, this notion of shape-complexity measures how entangled a polygon is, and is thus highly independent of the number of vertices. A practical advantage of the algorithm is that it does not require sorting or the use of any balanced tree structure. Aside from the notion of sinuosity, we are also able to characterize a large class of polygons for which the algorithm can be proven to run in O(n log log n) time. The algorithm has been implemented, tested, and empirical evidence has confirmed its theoretical claim to efficiency.},
author = {Chazelle, B. and Incerpi, J.},
doi = {10.1145/357337.357340},
file = {:home/t.kuipers/Downloads/10.1.1.86.3490.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
number = {2},
pages = {135--152},
title = {{Triangulation and shape-complexity}},
volume = {3},
year = {1984}
}
@article{chen2018,
author = {Chen, Desai and Levin, David I. W. and Sueda, Shinjiro and Matusik, Wojciech},
doi = {10.1145/2766889},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Chen et al. - 2015 - Data-driven finite elements for geometry and material design.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {data-driven simulation,finite element methods,material design,numerical coarsening},
month = {jul},
number = {4},
pages = {74:1--74:10},
publisher = {ACM},
title = {{Data-driven finite elements for geometry and material design}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2809654.2766889},
volume = {34},
year = {2015}
}
@article{chen2011inplane,
abstract = {In this paper, we study the elastic buckling of a new class of honeycomb materials with hierarchical architecture, which is often observed in nature. Employing the topedown approach, the virtual buckling stresses and corresponding strains for each cell wall at level n - 1 are calculated from those at level n; then, comparing these virtual buckling stresses of all cell walls, the real local buckling stress is deduced; also, the progressive failure of the hierarchical structure is studied. Finally, parametric analyses reveal influences of some key parameters on the local buckling stress and strength-to-density ratio; meanwhile the constitutive behaviors and energy-absorption properties, with increasing hierarchy n, are calculated. The results show the possibility to tailor the elastic buckling properties at each hierarchical level, and could thus have interesting applications, e.g., in the design of multiscale energy-absorption honeycomb light materials. {\textcopyright} 2011 Elsevier Masson SAS.},
author = {Chen, Qiang and Pugno, Nicola M.},
doi = {10.1016/j.euromechsol.2011.12.003},
file = {:home/t.kuipers/Downloads/1-s2.0-S0997753811001781-main.pdf:pdf},
isbn = {978-0-85709-710-1},
COMMENTEDissn = {09977538},
journal = {European Journal of Mechanics, A/Solids},
keywords = {Energy absorption,Hierarchical honeycomb,Local buckling stress,Progressive failure},
pages = {120--129},
publisher = {Elsevier Masson SAS},
title = {{In-plane elastic buckling of hierarchical honeycomb materials}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.euromechsol.2011.12.003},
volume = {34},
year = {2012}
}
@article{Chen2019,
author = {Chen, Wei and Dai, Ning and Wang, Jinqiang and Liu, Hao and Li, Dawei and Liu, Lele},
doi = {10.1115/1.4043559},
file = {:home/t.kuipers/Downloads/10.1115@1.4043559.pdf:pdf},
COMMENTEDissn = {0148-0731},
journal = {Journal of Biomechanical Engineering},
number = {c},
title = {{Personalized Design of Functional Gradient Bone Tissue Engineering Scaffold}},
COMMENTEDurl = {http://biomechanical.asmedigitalcollection.asme.org/article.aspx?doi=10.1115/1.4043559},
year = {2019}
}
@article{Chen2016,
author = {Chen, Weikai and Zhang, Xiaolong and Xin, Shiqing and Xia, Yang and Lefebvre, Sylvain and Wang, Wenping},
doi = {10.1145/2897824.2925911},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Chen et al. - 2016 - Synthesis of filigrees for digital fabrication.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {digital fabrication,filigree synthesis,hausdorff distance,medial axis},
month = {jul},
number = {4},
pages = {1--13},
publisher = {ACM},
title = {{Synthesis of filigrees for digital fabrication}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2897824.2925911},
volume = {35},
year = {2016}
}
@article{Chen2017,
abstract = {This paper focuses on the problem of generating a line drawing from a given image for fused deposition modeling. The abstracted line drawing, comprising of lines with a single color and thickness, would preserve both tone and edges of the input image. We first partition the image into sub-regions manually. The boundaries of the sub-regions are extracted as the feature lines of the image. Next, a proper number of points are randomly placed on the image plane with a density proportional to the darkness of the image. We use Lloyd's method to push the sampling points away from each other and the feature lines. The points within each sub-region are then connected by solving a travelling salesman problem (TSP). Finally, we further optimize the fairness and the spacing of the lines by minimizing a tailored objective function. A variety of experimental results are presented to show the effectiveness of our method for generating line drawings for 3D printing.},
author = {Chen, Zhonggui and Shen, Zifu and Guo, Jianzhi and Cao, Juan and Zeng, Xiaoming},
doi = {10.1016/j.cag.2017.05.019},
file = {:home/t.kuipers/Downloads/1-s2.0-S0097849317300687-main.pdf:pdf;:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Chen et al. - 2017 - Line drawing for 3D printing.pdf:pdf},
COMMENTEDissn = {00978493},
journal = {Computers and Graphics (Pergamon)},
keywords = {3D printing,Image stippling,Line drawing,TSP},
pages = {85--92},
publisher = {Elsevier},
title = {{Line drawing for 3D printing}},
volume = {66},
year = {2017}
}
@article{Cheng2019,
abstract = {Advances in additive manufacturing (AM) have drawn considerable interest due to its ability to produce geometrically complex structure, such as lattice materials. In this work, a novel methodology is proposed to design graded lattice structure through topology optimization under stress constraint, in order to generate lightweight lattice structure design with predictable yield performance. Instead of using the power law of material interpolation in the SIMP method, asymptotic homogenization method is employed to compute the effective elastic properties of lattice material in terms of design variable, i.e. relative density. For yield strength, a multiscale failure model is proposed to capture yield strength of microstructure with macroscopic stress. At macroscale, a modified Hill's yield criterion is employed to describe anisotropic yield strength of lattice material. The material constants in Hill's model are assumed to be a function of relative density, and thus a model is built up to formulate yield strength of lattice structure with macroscopic stress. The experimental verification on the printed samples demonstrates that both the homogenized elastic model and yield model can accurately describe the elasticity and plasticity of the lattice structure. Based on the proposed material interpolation for lattice structure, a lattice structure topology optimization framework is proposed for minimizing total weight of the structure under stress constraint. The sensitivity analysis is performed for the implementation of the optimization algorithm. Two three-dimensionally numerical examples are performed to demonstrate the effectiveness of the proposed optimization method, as well as accuracy of the proposed homogenization technique for graded lattice structure design. Experiment is conducted to systematically examine yielding of the optimally graded lattice structure design and compare its performance with a uniform structure. It is found that the proposed optimization framework is valid for the design examples examined and can significantly enhance mechanical performance of the structure (i.e. yield loading, stiffness, energy absorption, etc.)},
author = {Cheng, Lin and Bai, Jiaxi and To, Albert C.},
doi = {10.1016/j.cma.2018.10.010},
file = {:home/t.kuipers/Downloads/cheng2019.pdf:pdf},
COMMENTEDissn = {00457825},
journal = {Computer Methods in Applied Mechanics and Engineering},
keywords = {Additive manufacturing,Homogenization,Lattice structure topology optimization,Stress constraint},
pages = {334--359},
publisher = {Elsevier B.V.},
title = {{Functionally graded lattice structure topology optimization for the design of additive manufactured components with stress constraints}},
COMMENTEDurl = {https://doi.org/10.1016/j.cma.2018.10.010},
volume = {344},
year = {2019}
}
@article{Cheng2017,
abstract = {{\textcopyright} 2017 Emerald Publishing Limited. Purpose - The purpose of the paper is to propose a homogenization-based topology optimization method to optimize the design of variable-density cellular structure, in order to achieve lightweight design and overcome some of the manufacturability issues in additive manufacturing. Design/methodology/approach - First, homogenization is performed to capture the effective mechanical properties of cellular structures through the scaling law as a function their relative density. Second, the scaling law is used directly in the topology optimization algorithm to compute the optimal density distribution for the part being optimized. Third, a new technique is presented to reconstruct the computer-aided design (CAD) model of the optimal variable-density cellular structure. The proposed method is validated by comparing the results obtained through homogenized model, full-scale simulation and experimentally testing the optimized parts after being additive manufactured. Findings - The test examples demonstrate that the homogenization-based method is efficient, accurate and is able to produce manufacturable designs. Originality/value - The optimized designs in our examples also show significant increase in stiffness and strength when compared to the original designs with identical overall weight.},
author = {Cheng, Lin and Zhang, Pu and Biyikli, Emre and Bai, Jiaxi and Robbins, Joshua and To, Albert},
doi = {10.1108/RPJ-04-2016-0069},
file = {:home/t.kuipers/Downloads/2017RPJ.pdf:pdf},
COMMENTEDissn = {13552546},
journal = {Rapid Prototyping Journal},
keywords = {Additive manufacturing,Cellular structure,Homogenization,Reconstruction,Topology optimization},
number = {4},
pages = {660--677},
title = {{Efficient design optimization of variable-density cellular structures for additive manufacturing: Theory and experimental validation}},
volume = {23},
year = {2017}
}
@article{Chesser2019,
author = {Chesser, Phillip and Post, Brian and Roschli, Alex and Carnal, Charles and Lind, Randall and Borish, Michael and Love, Lonnie},
doi = {10.1016/j.addma.2019.05.020},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860418307000-main.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Big Area Additive Manufacturing,Feedforward control,Geometric tolerance,High quality,Multi-resolution printing,big area additive manufacturing,multi-resolution printing},
number = {September 2018},
pages = {445--455},
publisher = {Elsevier},
title = {{Extrusion Control for High Quality Printing on Big Area Additive Manufacturing (BAAM) Systems}},
COMMENTEDurl = {https://doi.org/10.1016/j.addma.2019.05.020},
volume = {28},
year = {2019}
}
@article{Cho2003851,
annote = {cited By (since 1996)18},
author = {Cho, W and Sachs, E M and Patrikalakis, N M and Troxel, D E},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448502001227-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {,Algorithms,Anisotropy,Computational geometry,Local composition control (LCC),Printing Machines,Printing machinery,Texture,Textures},
number = {9},
pages = {851--867},
title = {{A dithering algorithm for local composition control with three-dimensional printing}},
volume = {35},
year = {2003}
}
@article{Choi1997,
abstract = {In this paper, we present a new approximate algorithm for medial axis transform of a plane domain. The underlying philosophy of our approach is the localization idea based on the Domain Decomposition Lemma, which enables us to break up the complicated domain into smaller and simpler pieces. We then develop tree data structure and various operations on it to keep track of the information produced by the domain decomposition procedure. This strategy enables us to isolate various important points such as branch points and terminal points. Because our data structure guarantees the existence of such important points - in fact, our data structure is devised with this in mind - we can zoom in on those points. This makes our algorithm efficient. Our algorithm is a "from within" approach, whereas traditional methods use a "from-the-boundary" approach. This "from within" nature of our algorithm and the localization scheme help mitigate various instability phenomena, thereby making our algorithm reasonably robust. {\textcopyright} 1997 Academic Press.},
author = {Choi, Hyeong In and Choi, Sung Woo and Moon, Hwan Pyo and Wee, Nam Sook},
doi = {10.1006/gmip.1997.0444},
file = {:home/t.kuipers/Downloads/5b583303af0b4d60d356d08f8ed84e1babbc.pdf:pdf},
COMMENTEDissn = {10773169},
journal = {Graphical Models and Image Processing},
number = {6},
pages = {463--483},
title = {{New Algorithm for Medial Axis Transform of Plane Domain}},
volume = {59},
year = {1997}
}
@article{choy2017compressive,
abstract = {Additive manufacturing provides great geometrical freedom for fabricating structures with complex or customized architecture. One of the applications benefiting from this technology is the fabrication of functionally graded materials with high degree of control of internal architecture which can be strategic application in advanced energy absorption. This study aims to explore the mechanical properties of functionally graded lattice structures fabricated by an additive manufacturing technique namely, selective laser melting (SLM), with Ti-6Al-4V as the building material. Both cubic lattice and honeycomb lattice structures with varied strut diameter and density were designed and manufactured, and their physical characteristics, deformation behavior and compressive properties were investigated. The collapse of structure always started from least dense layer to the denser layers. In contrast, samples with uniform density showed abrupt shear failure with diagonal cracking across the whole structure. The plateau stress and specific energy absorption of density graded samples were higher than for uniform density samples for three out of four designs by up to 67{\%} and 72{\%}, respectively. In addition, density graded lattices showed distinct energy absorption behavior with cumulative energy absorption increasing as a power of strain function while uniform density lattices showed a near-linear relationship.},
author = {Choy, Sing Ying and Sun, Chen Nan and Leong, Kah Fai and Wei, Jun},
doi = {10.1016/j.matdes.2017.06.006},
file = {:home/t.kuipers/Downloads/1-s2.0-S0264127517305890-main.pdf:pdf},
isbn = {02641275},
COMMENTEDissn = {18734197},
journal = {Materials and Design},
keywords = {Additive manufacturing,Compression properties,Functionally graded material,Lattice structure,Selective laser melting},
number = {May},
pages = {112--120},
publisher = {Elsevier},
title = {{Compressive properties of functionally graded lattice structures manufactured by selective laser melting}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.matdes.2017.06.006},
volume = {131},
year = {2017}
}
@article{ISI:000392917400014,
author = {Clausen, Anders and Aage, Niels and Sigmund, Ole},
doi = {10.1016/J.ENG.2016.02.006},
COMMENTEDissn = {2095-8099},
journal = {ENGINEERING},
month = {jun},
number = {2},
pages = {250--257},
title = {{Exploiting Additive Manufacturing Infill in Topology Optimization for Improved Buckling Load}},
volume = {2},
year = {2016}
}
@article{Clausen2015,
abstract = {Topology optimized architectures are designed and printed with programmable Poisson's ratios ranging from -0.8 to 0.8 over large deformations of 20{\%} or more.},
author = {Clausen, Anders and Wang, Fengwen and Jensen, Jakob S. and Sigmund, Ole and Lewis, Jennifer A.},
doi = {10.1002/adma.201502485},
file = {:home/t.kuipers/Downloads/Clausen{\_}et{\_}al-2015-Advanced{\_}Materials.pdf:pdf},
COMMENTEDissn = {15214095},
journal = {Advanced Materials},
keywords = {3D printing,Poisson's ratio,large deformations,material design,topology optimization},
number = {37},
pages = {5523--5527},
title = {{Topology Optimized Architectures with Programmable Poisson's Ratio over Large Deformations}},
volume = {27},
year = {2015}
}
@article{Clijsters2013,
abstract = {Selective Laser Melting (SLM) is a layer wise production technique enabling the production of complex metallic parts. In the SLM process parts are built by selectively melting subsequent layers of powder by a laser beam. Nowadays during SLM fixed scan parameters are used (laser power, scan velocity and scan pattern) that should ensure the formation of a sufficiently large and stable melt pool fusing powder particles together. The stability of the melt pool formed during SLM should ensure adequate part accuracy, surface roughness and part density, and thus good mechanical properties. However, the local geometry of the part being build has a large influence on the thermal behavior in and around the melt pool and therefore on the quality of features, mainly when melting along thin walls, sharp corners or down facing layers (layers above powder) that largely influences the local thermal behavior. Detecting such features from the CAD model and using locally adapted scanning parameters for processing those features enables to optimize the quality and density of the part, independently of its local geometry. This paper studies strategies to build thin walls with correct dimensions using locally optimized scan parameters.},
author = {Clijsters, Stijn},
doi = {10.1007/978-94-011-4489-6_23},
file = {:home/t.kuipers/Downloads/34523562.pdf:pdf},
pages = {361--368},
title = {{Optimization of thin wall structures in SLM}},
COMMENTEDurl = {https://core.ac.uk/download/pdf/34523562.pdf},
year = {2013}
}
@incollection{coleman1986necking,
author = {Coleman, Bernard D},
booktitle = {The Breadth and Depth of Continuum Mechanics},
file = {:home/t.kuipers/Downloads/Coleman1983{\_}Article{\_}NeckingAndDrawingInPolymericFi.pdf:pdf},
pages = {19--41},
publisher = {Springer},
title = {{Necking and drawing in polymeric fibers under tension}},
year = {1986}
}
@article{corbett2012reprap,
author = {Corbett, James},
journal = {Final Year MEng Project, Department of Mechanical Engineering, Faculty of Engineering and Design, University of Bath, Bath},
title = {{Reprap colour mixing project}},
year = {2012}
}
@article{Cox1994CAD,
abstract = {Several methods have been developed for the computerized generation of space-filling curves, but these curves have never been used for NC tool-path generation. The paper discusses the application of space-filling curves as tool paths for sculptured-surface machining. Tool paths that are space-filling curves, single-direction conventional paths, and 2-direction conventional paths are compared. The efficiency ratings of the paths require further testing, but the preliminary conclusions are favourable for space-filling curves.},
annote = {Special Issue:NC machining and cutter-path generation},
author = {Cox, Jordan J and Takezaki, Yasuko and Ferguson, Helaman R P and Kohkonen, Kent E and Mulkay, Eric L},
doi = {https://doi.org/10.1016/0010-4485(94)90044-2},
COMMENTEDissn = {0010-4485},
journal = {Computer-Aided Design},
keywords = {NC tool paths,numerical control,sculptured surfaces,space-filling curves,surface finish,tool-path generation},
number = {3},
pages = {215--224},
title = {{Space-filling curves in tool-path applications}},
COMMENTEDurl = {http://www.sciencedirect.com/science/article/pii/0010448594900442},
volume = {26},
year = {1994}
}
@article{de2006advances,
author = {{De Beer}, N},
journal = {Journal for New Generation Sciences},
number = {1},
pages = {21--49},
publisher = {Central University of Technology, Free State},
title = {{Advances in three dimensional printing-state of the art and future perspectives}},
volume = {4},
year = {2006}
}
@article{Dey2003,
abstract = {Abstract The medial axis of a surface in 3D is the closure of all points that have two or more closest points on the surface. It is an essential geometric structure in a number of applications involving 3D geometric shapes. Since exact computation of the medial axis is difficult in general, efforts continue to improve their approximations. Voronoi diagrams turn out to be useful for this approximation. Although it is known that Voronoi vertices for a sample of points from a curve in 2D approximate its medial axis, a similar result does not hold in 3D. Recently, it has been discovered that only a subset of Voronoi vertices converge to the medial axis as sample density approaches infinity. However, most applications need a nondiscrete approximation as opposed to a discrete one. To date no known algorithm can compute this approximation straight from the Voronoi diagram with a guarantee of convergence. We present such an algorithm and its convergence analysis in this paper. One salient feature of the algorithm is that it is scale and density independent. Experimental results corroborate our theoretical claims.},
author = {Dey, Tamal K. and Zhao, Wulue},
doi = {10.1007/s00453-003-1049-y},
file = {:home/t.kuipers/Downloads/Dey-Zhao2004{\_}Article{\_}ApproximatingTheMedialAxisFrom.pdf:pdf},
COMMENTEDissn = {01784617},
journal = {Algorithmica (New York)},
keywords = {Delaunay triangulation,Geometric modeling,Medial axis,Samples,Voronoi diagram},
number = {1},
pages = {179--200},
title = {{Approximating the medial axis from the Voronoi diagram with a convergence guarantee}},
volume = {38},
year = {2003}
}
@article{Ding2014,
abstract = {Wire and arc additive manufacturing (WAAM) is a promising alternative to traditional subtractive manufacturing for fabricating large aerospace components that feature high buy-to-fly ratio. Since the WAAM process builds up a part with complex geometry through the deposition of weld beads on a layer-by-layer basis, it is important to model the geometry of a single weld bead as well as the multi-bead overlapping process in order to achieve high surface quality and dimensional accuracy of the fabricated parts. This study firstly builds models for a single weld bead through various curve fitting methods. The experimental results show that both parabola and cosine functions accurately represent the bead profile. The overlapping principle is then detailed to model the geometry of multiple beads overlapping together. The tangent overlapping model (TOM) is established and the concept of the critical centre distance for stable multi-bead overlapping processes is presented. The proposed TOM is shown to provide a much better approximation to the experimental measurements when compared with the traditional flat-top overlapping model (FOM). This is critical in process planning to achieve better geometry accuracy and material efficiency in additive manufacturing.},
author = {Ding, Donghong and Pan, Zengxi and Cuiuri, Dominic and Li, Huijun},
doi = {10.1007/s00170-014-5808-5},
file = {:home/t.kuipers/Downloads/Ding 2014 - A tool-path generation strategy for wire and arc additive manufacturing.pdf:pdf},
COMMENTEDissn = {14333015},
journal = {International Journal of Advanced Manufacturing Technology},
keywords = {Additive manufacturing,Arc welding,Geometry decomposition,Tool-path generation},
number = {1-4},
pages = {173--183},
title = {{A tool-path generation strategy for wire and arc additive manufacturing}},
volume = {73},
year = {2014}
}
@article{Ding2015a,
abstract = {This study presents a process planning system, which directly generates manufacturing code from CAD models for robotic wire and arc additive manufacturing (WAAM). A variety of modules are developed for this system with special considerations on slicing and path planning. Multi-direction slicing methodology is developed to allow the WAAM system to deposit material along multiple directions and eliminate the need for supporting structure. MAT-based path planning method is proposed for void-free deposition of layers with any complex geometry. The proposed automatic process planning system is an important tool for the development of mature WAAM technology.},
author = {Ding, Donghong and Pan, Zengxi and Cuiuri, Dominic and Li, Huijun},
doi = {10.1109/ICIEA.2015.7334441},
file = {:home/t.kuipers/Downloads/07334441.pdf:pdf},
isbn = {9781467373173},
journal = {Proceedings of the 2015 10th IEEE Conference on Industrial Electronics and Applications, ICIEA 2015},
keywords = {additive manufacturing,path planning,process planning,slicing,welding},
pages = {2000--2003},
publisher = {IEEE},
title = {{Process planning for robotic wire and arc additive manufacturing}},
volume = {D},
year = {2015}
}
@article{Ding2015,
abstract = {This paper presents a novel methodology to generate deposition paths for wire and arc additive manufacturing (WAAM). The medial axis transformation (MAT), which represents the skeleton of a given geometry, is firstly extracted to understand the geometry. Then a deposition path that is based on the MAT is efficiently generated. The resulting MAT-based path is able to entirely fill any given cross-sectional geometry without gaps. With the variation of step-over distance, material efficiency alters accordingly for both solid and thin-walled structures. It is found that thin-walled structures are more sensitive to step-over distance in terms of material efficiency. The optimal step-over distance corresponding to the maximum material efficiency can be achieved for various geometries, allowing the optimization of the deposition parameters. Five case studies of complex models including solid and thin-walled structures are used to test the developed methodology. Experimental comparison between the proposed MAT-based path patterns and the traditional contour path patterns demonstrate significant improved performance in terms of gap-free cross-sections. The proposed path planning strategy is shown to be particularly beneficial for WAAM of thin-walled structures.},
author = {Ding, Donghong and Pan, Zengxi and Cuiuri, Dominic and Li, Huijun},
doi = {10.1016/j.rcim.2015.01.003},
file = {:home/t.kuipers/Downloads/1-s2.0-S0736584515000162-main.pdf:pdf},
COMMENTEDissn = {07365845},
journal = {Robotics and Computer-Integrated Manufacturing},
keywords = {Additive manufacturing,Material efficiency,Medial axis transformation,Path planning,Thin-walled},
pages = {8--19},
publisher = {Elsevier},
title = {{A practical path planning methodology for wire and arc additive manufacturing of thin-walled structures}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.rcim.2015.01.003},
volume = {34},
year = {2015}
}
@article{Ding2016a,
abstract = {Wire-feed additive manufacturing technologies have made it possible to significantly reduce material waste and energy consumption for fabricating large aerospace metal components that feature high buy-to-fly ratios. This paper presents an innovative path planning strategy using medial axis transformation for the wire-feed additive manufacturing process. The proposed path planning strategy is able to improve geometrical accuracy and produce void-free deposition by continuously altering the deposition width of the wire-feed process to accommodate the component geometry, while simultaneously minimising the number of interruptions to the deposition process at the component boundary. As a result, both buy-to-fly ratio and energy consumption are improved through reducing material waste. The algorithm for generating the adaptive path is described and validated through application to various typical geometries. Buy-to-fly ratios are calculated for a number of thin-walled complex structures. Savings of more than 27{\%} in material usage are achieved using adaptive path planning, when compared with non-adaptive methods. The proposed method is tested experimentally through deposition of two metal components. The results demonstrate that the adaptive strategy is capable of generating void-free deposition with improved accuracy at the component boundary using the wire-feed additive manufacturing process.},
author = {Ding, Donghong and Pan, Zengxi and Cuiuri, Dominic and Li, Huijun and Larkin, Nathan},
doi = {10.1016/j.jclepro.2016.06.036},
file = {:home/t.kuipers/Downloads/1-s2.0-S0959652616307119-main.pdf:pdf},
COMMENTEDissn = {09596526},
journal = {Journal of Cleaner Production},
keywords = {Adaptive path planning,Additive manufacturing,Geometrical accuracy,Medial axis transformation,Wire},
pages = {942--952},
publisher = {Elsevier},
title = {{Adaptive path planning for wire-feed additive manufacturing using medial axis transformation}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.jclepro.2016.06.036},
volume = {133},
year = {2016}
}
@article{Ding2016,
abstract = {Wire and arc additive manufacturing (WAAM) is a promising alternative to traditional subtractive methods for fabricating large aerospace metal components that feature high buy-to-fly ratios. This study focuses on the development of an automated manufacturing system in order to free the operator from intervening in the analysis of the CAD model, planning the deposition path, and then manually setting the welding process parameters. Firstly, the relationship between single bead geometry and welding process parameters is established through an artificial neural network (ANN) model. Then, the adaptive medial axis transformation (MAT) algorithm for void-free deposition with high geometrical accuracy is introduced. The adaptive MAT path is implemented by using the single bead ANN model together with a previously developed multi-bead overlapping model. Finally, the adaptive MAT path planning strategy and the established bead models are tested through experimental deposition of two metal components. The results show that the developed bead model and adaptive MAT-based path are capable of producing depositions with high quality (void-free) and geometrical accuracy through automated selection of process variables for the WAAM process.},
author = {Ding, Donghong and Pan, Zengxi and Cuiuri, Dominic and Li, Huijun and {Van Duin}, Stephen and Larkin, Nathan},
doi = {10.1016/j.rcim.2015.12.004},
file = {:home/t.kuipers/Downloads/1-s2.0-S0736584515301629-main.pdf:pdf},
COMMENTEDissn = {07365845},
journal = {Robotics and Computer-Integrated Manufacturing},
keywords = {Additive manufacturing,Arc welding,Bead model,Medial axis transformation (MAT),Path planning},
pages = {32--42},
publisher = {Elsevier},
title = {{Bead modelling and implementation of adaptive MAT path in wire and arc additive manufacturing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.rcim.2015.12.004},
volume = {39},
year = {2016}
}
@inproceedings{Dinh2015,
address = {New York, New York, USA},
author = {Dinh, H. Quynh and Gelman, Filipp and Lefebvre, Sylvain and Claux, Fr{\'{e}}d{\'{e}}ric},
booktitle = {ACM SIGGRAPH 2015 Courses on - SIGGRAPH '15},
doi = {10.1145/2776880.2792702},
isbn = {9781450336345},
pages = {1--273},
publisher = {ACM Press},
title = {{Modeling and toolpath generation for consumer-level 3d printing}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2776880.2792702},
year = {2015}
}
@article{dumas2014bridging,
author = {Dumas, J{\'{e}}r{\'{e}}mie and Hergel, Jean and Lefebvre, Sylvain},
doi = {10.1145/2601097.2601153},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Dumas, Hergel, Lefebvre - 2014 - Bridging the gap.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,FDM,FFF,scaffoldings,supports},
month = {jul},
number = {4},
pages = {98},
publisher = {ACM},
title = {{Bridging the gap: automated steady scaffoldings for 3D printing}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2601097.2601153},
volume = {33},
year = {2014}
}
@article{Dumas2014,
author = {Dumas, J{\'{e}}r{\'{e}}mie and Hergel, Jean and Lefebvre, Sylvain},
doi = {10.1145/2601097.2601153},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Dumas, Hergel, Lefebvre - 2014 - Bridging the gap.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,FDM,FFF,scaffoldings,supports},
month = {jul},
number = {4},
pages = {1--10},
publisher = {ACM},
title = {{Bridging the gap}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2601097.2601153},
volume = {33},
year = {2014}
}
@article{dumas2015byexample,
abstract = {Several techniques exist to automatically synthesize a 2D image resembling an input exemplar texture. Most of the approaches op- timize a new image so that the color neighborhoods in the output closely match those in the input, across all scales. In this paper we revisit by-example texture synthesis in the context of additive man- ufacturing. Our goal is to generate not only colors, but also struc- ture along output surfaces: given an exemplar indicating 'solid' and 'empty' pixels, we generate a similar pattern along the output sur- face. The core challenge is to guarantee that the pattern is not only fully connected, but also structurally sound. To achieve this goal we propose a novel formulation for on-surface by-example texture synthesis that directly works in a voxel shell around the surface. It enables efficient local updates to the pattern, letting our structural optimizer perform changes that improve the overall rigidity of the pattern.We use this technique in an iterative scheme that jointly optimizes for appearance and structural sound- ness.We consider fabricability constraints and a user-provided de- scription of a force profile that the object has to resist. Our results fully exploit the capabilities of additive manufacturing by letting users design intricate structures along surfaces. The struc- tures are complex, yet they resemble input exemplars, resulting in a modeling tool accessible to casual users.},
annote = {From Duplicate 1 (By-Example Synthesis of Structurally Sound Patterns - Dumas, Jeremie; Lu, An; Lefebvre, Sylvain; Wu, Jun; Dick, Christian)

ACM SIGGRAPH Conference, Los Angeles, CA, AUG 09-13, 2015

From Duplicate 2 (By-example synthesis of structurally sound patterns - Dumas, J{\'{e}}r{\'{e}}mie; Lu, An; Lefebvre, Sylvain; Wu, Jun; M{\"{u}}nchen, T. U.; Dick, Christian; M{\"{u}}nchen, T. U.)

From Duplicate 2 (By-Example Synthesis of Structurally Sound Patterns - Dumas, Jeremie; Lu, An; Lefebvre, Sylvain; Wu, Jun; Dick, Christian)

ACM SIGGRAPH Conference, Los Angeles, CA, AUG 09-13, 2015},
author = {Dumas, J{\'{e}}r{\'{e}}mie and Lu, An and Lefebvre, Sylvain and Wu, Jun and M{\"{u}}nchen, T. U. and Dick, Christian and M{\"{u}}nchen, T. U.},
doi = {10.1145/2766984},
file = {:home/t.kuipers/Downloads/a137-dumas.pdf:pdf},
institution = {ACM SIGGRAPH},
isbn = {9781450333313},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
month = {aug},
number = {4},
pages = {137:1--137:12},
title = {{By-example synthesis of structurally sound patterns}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2809654.2766984},
volume = {34},
year = {2015}
}
@inproceedings{eiamsa2003toward,
  title={Toward automatic process planning of a multi-axis hybrid laser aided manufacturing system: skeleton-based offset edge generation},
  author={Eiamsa-ard, Kunnayut and Liou, Frank W and Landers, Robert G and Choset, Howie},
  booktitle={ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference},
  pages={227--235},
  year={2003},
  organization={American Society of Mechanical Engineers Digital Collection},
COMMENTEDauthor = {Eiamsa-ard, Kunnayut and Liou, F. W. and Landers, Robert G. and Choset, Howie},
COMMENTEDtitle = "{Toward Automatic Process Planning of a Multi-Axis Hybrid Laser Aided Manufacturing System: Skeleton-Based Offset Edge Generation}",
COMMENTEDvolume = {29th Design Automation Conference},
COMMENTEDseries = {IDETC-CIE},
COMMENTEDyear = {2008},
COMMENTEDmonth = {06},
doi = {10.1115/DETC2003/DAC-48726},
COMMENTEDurl = {https://doi.org/10.1115/DETC2003/DAC-48726},
COMMENTEDeprint = {https://asmedigitalcollection.asme.org/IDETC-CIE/proceedings-pdf/IDETC-CIE2003/37009/227/2594325/227\_1.pdf},
}
@article{Elber1991,
author = {Elber, Gershon and Cohen, Elaine},
file = {:home/t.kuipers/Downloads/elber1991.pdf:pdf},
journal = {International Journal of Computational Geometry {\&} Applications},
number = {1},
title = {{Error bounded variable distance offset operator for freeform curves and surfaces}},
volume = {1},
year = {1991}
}
@article{elber1991error,
author = {Elber, Gershon and Cohen, Elaine},
file = {:home/t.kuipers/Downloads/elber1991.pdf:pdf},
journal = {International Journal of Computational Geometry {\&} Applications},
number = {01},
pages = {67--78},
publisher = {World Scientific},
title = {{Error bounded variable distance offset operator for free form curves and surfaces}},
volume = {1},
year = {1991}
}
@article{elkhuizen2015reproducing,
abstract = {In the field of Fine Art reproduction, 3D scanning plus 3D printing, combined with dedicated software, now allows to capture and reproduce the color and texture of oil paintings. However, for life-like reproduction of the material appearance of such paintings, the typical gloss and translucency must also be included, which is currently not the case. The aim of this paper is to elaborate on the challenges and results of capturing and reproducing oil paint gloss (next to texture and color) using a scanning and printing system. A sample was hand-made using oil paint and acrylic varnish, and its gloss was then reproduced. A gloss map of the painted sample was acquired using a high end DLSR camera and a simple acquisition protocol. Next, Oc{\'{e}} High Resolution 3D printing technology was used to create samples with spatially varying gloss. For this, two different strategies were combined: (1) multilevel half-toning of the colors was used to reproduce matte color layers, and (2) varnish was half-toned on top in increasing coverage to recreate increasing gloss levels. This paper presents an overview of the state-of-the-art literature in gloss reproduction and perception, our process of reproduction as well as the visual evaluation of the quality of the created reproduction.},
author = {Elkhuizen, Willemijn S. and Lenseigne, Boris a. J. and Baar, Teun and Verhofstad, Wim and Tempelman, Erik and Geraedts, Jo M. P. and Dik, Joris},
doi = {10.1117/12.2082918},
file = {:home/t.kuipers/Downloads/93980W.pdf:pdf},
isbn = {9781628414882},
COMMENTEDissn = {1996756X},
journal = {SPIE-IS{\&}T Electronic Imaging},
keywords = {3d printing,3d scanning,fine art,gloss,oil painting,perception,reproduction,workflow},
number = {0},
pages = {93980W},
title = {{Reproducing oil paint gloss in print for the purpose of creating reproductions of Old Masters}},
COMMENTEDurl = {http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2082918},
volume = {9398},
year = {2015}
}
@article{Ertay2018,
abstract = {Additive manufacturing (AM) technologies are used in three dimensional (3D) printing of parts using thermo-plastic extruders, or laser and electron beam based metal deposition methods. This paper presents an integrated methodology for planning of tangential path velocity, material deposition rate and temperature control of the extruded material which is deposited along curved paths. The tangential velocity along the path is smoothed and optimized while respecting the heater's and extruder's capacities, as well as the feed drives' jerk, acceleration and velocity limits. The extrusion rate is controlled proportional to the tangential path velocity while keeping the temperature of the deposited thermo-plastic material at the desired temperature by adaptively controlling current supply to the heater. The experimentally proven algorithm leads to more uniform material deposition at sharp curvatures and resulting improved dimensional accuracy of printed parts. The proposed methodology can be extended to laser and electron beam based metal printing applications.},
author = {Ertay, Deniz Sera and Yuen, Alexander and Altintas, Yusuf},
doi = {10.1016/j.addma.2017.05.011},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860416303657-main.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Additive manufacturing (AM),Fused filament fabrication (FFF),Synchronized material deposition rate,Temperature control},
pages = {205--213},
publisher = {Elsevier B.V.},
title = {{Synchronized material deposition rate control with path velocity on fused filament fabrication machines}},
COMMENTEDurl = {https://doi.org/10.1016/j.addma.2017.05.011},
volume = {19},
year = {2018}
}
@article{Etienne2019,
author = {Etienne, Jimmy and Ray, Nicolas and Panozzo, Daniele and Hornus, Samuel and Wang, Charlie and Mart{\'{i}}nez, Jon{\`{a}}s and Mcmains, Sara and Alexa, Marc and Wyvill, Brian and Lefebvre, Sylvain and Etienne, Jimmy and Ray, Nicolas and Panozzo, Daniele and Hornus, Samuel and Wang, Charlie and Etienne, Jimmy and Lorraine, Universit{\'{e}} De and Wyvill, Brian},
file = {:home/t.kuipers/Downloads/CurviSlice{\_}tex.pdf:pdf},
title = {{CurviSlicer : Slightly curved slicing for 3-axis printers To cite this version : HAL Id : hal-02120033 CurviSlicer : Slightly curved slicing for 3-axis printers}},
year = {2019}
}
@article{Ezair2018,
abstract = {In additive manufacturing (AM), slicing is typically used to manufacture 3D models, one layer after another. Yet, in recent years quite a few hardware platforms were introduced toward the use of multi-axes AM with general 3D curves as print-paths. This paper presents algorithms for the generation of such general print-paths that can potentially be used to synthesize superior 3D models using AM. In slicing, a 3D model is decomposed into a series of parallel planar sections, which in turn are (usually) decomposed into a set of piecewise linear curves used as print-paths in the AM process. The methods we propose in this work ease this restriction, namely the print-paths are no longer limited to parallel planes. Like slicing, the methods we propose achieve a complete covering of a general volume with print-paths expressed as general curves. However, and unlike slicing, the created print-paths can conform better to the 3D model, its properties, and even user input. We expect that the added flexibility and freedom in the specification of AM print-paths, as opposed to limiting them to planar curves, will enable the synthesis of 3D models (using AM) with superior properties (such as mechanical strength and surface finish). As a proof of concept, we also present examples of 3D models manufactured with a low-end AM hardware and using the algorithms described in this paper.},
author = {Ezair, Ben and Fuhrmann, Saul and Elber, Gershon},
doi = {10.1016/j.cad.2018.02.006},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448518300812-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {3D-printing optimization,Additive manufacturing,Volumetric covering},
pages = {1--13},
publisher = {Elsevier},
title = {{Volumetric covering print-paths for additive manufacturing of 3D models}},
COMMENTEDurl = {https://doi.org/10.1016/j.cad.2018.02.006},
volume = {100},
year = {2018}
}
@article{Favre2018,
abstract = {This original work proposes to investigate the transposition of crystallography rules to cubic lattice architectured materials to generate new 3D porous structures. The application of symmetry operations provides a complete and convenient way to configure the lattice architecture with only two parameters. New lattice structures were created by slipping from the conventional Bravais lattice toward non-compact complex structures. The resulting stiffness of the porous materials was thoroughly evaluated for all the combinations of architecture parameters. This exhaustive study revealed attractive structures having high specific stiffness, up to twice as large as the usual octet-truss for a given relative density. It results in a relationship between effective Young modulus and relative density for any lattice structure. It also revealed the opportunity to generate auxetic structures at will, with a controlled Poisson ratio. The collection of the elastic properties for all the cubic structures into 3D maps provides a convenient tool for lattice materials design, for research, and for mechanical engineering. The resulting mechanical properties are highly variable according to architecture, and can be easily tailored for specific applications using the simple yet powerful formalism developed in this work.},
author = {Favre, Julien and Lohmuller, Paul and Piotrowski, Boris and Kenzari, Samuel and Laheurte, Pascal and Meraghni, Fodil},
doi = {10.1016/J.ADDMA.2018.02.020},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Favre et al. - 2018 - A continuous crystallographic approach to generate cubic lattices and its effect on relative stiffness of architec.pdf:pdf},
journal = {Additive Manufacturing},
month = {may},
pages = {359--368},
publisher = {Elsevier},
title = {{A continuous crystallographic approach to generate cubic lattices and its effect on relative stiffness of architectured materials}},
COMMENTEDurl = {https://www.sciencedirect.com/science/article/pii/S2214860418300174},
volume = {21},
year = {2018}
}
@article{ISI:000333728800003,
author = {Fee, Conan and Nawada, Suhas and Dimartino, Simone},
doi = {10.1016/j.chroma.2014.01.043},
COMMENTEDissn = {0021-9673},
journal = {JOURNAL OF CHROMATOGRAPHY A},
month = {mar},
pages = {18--24},
title = {{3D printed porous media columns with fine control of column packing morphology}},
volume = {1333},
year = {2014}
}
@inproceedings{floyd1976adaptive,
author = {Floyd, Robert W},
booktitle = {Proc. Soc. Inf. Disp.},
pages = {75--77},
title = {{An adaptive algorithm for spatial gray-scale}},
volume = {17},
year = {1976}
}
@article{fortune1986sascg,
author="Fortune, Steven",
title="A sweepline algorithm for Voronoi diagrams",
journal="Algorithmica",
year="1987",
month="Nov",
day="01",
volume="2",
number="1",
pages="153",
abstract="We introduce a geometric transformation that allows Voronoi diagrams to be computed using a sweepline technique. The transformation is used to obtain simple algorithms for computing the Voronoi diagram of point sites, of line segment sites, and of weighted point sites. All algorithms haveO(n logn) worst-case running time and useO(n) space.",
COMMENTEDissn="1432-0541",
doi="10.1007/BF01840357",
COMMENTEDurl="https://doi.org/10.1007/BF01840357"
}
@article{Foskey2003,
abstract = {Applications of of the medial axis have been limited because of its instability and algebraic complexity. In this paper, we use a simplification of the medial axis, the $\theta$-SMA, that is parameterized by a separation angle ($\theta$) formed by the vectors connecting a point on the medial axis to the closest points on the boundary. We present a formal characterization of the degree of simplification of the $\theta$-SMA as a function of 6, and we quantify the degree to which the simplified medial axis retains the features of the original polyhedron. We present a fast algorithm to compute an approximation of the $\theta$-SMA. It is based on a spatial subdivision scheme, and uses fast computation of a distance field and its gradient using graphics hardware. The complexity of the algorithm varies based on the error threshold that is used, and is a linear function of the input size. We have applied this algorithm to approximate the SMA of models with tens or hundreds of thousands of triangles. Its running time varies from a few seconds, for a model consisting of hundreds of triangles, to minutes for highly complex models.},
author = {Foskey, Mark and Lin, Ming C. and Manocha, Dinesh},
doi = {10.1115/1.1631582},
file = {:home/t.kuipers/Downloads/Efficient{\_}Computation{\_}of{\_}A{\_}Simplified{\_}Medial{\_}Axis.pdf:pdf},
isbn = {1581137060},
COMMENTEDissn = {15309827},
journal = {Journal of Computing and Information Science in Engineering},
keywords = {and many other applications,as a tool for,distance field,it is useful because,medial axis,motion,planning,shape analysis,surface reconstruction},
number = {4},
pages = {274},
title = {{Efficient Computation of A Simplified Medial Axis}},
volume = {3},
year = {2003}
}
@article{fournier1984,
abstract = {It' has long been known that the complexity of triangulation of simple polygons having an upper bound of 0 (n log n) but a lower bound higher than {\~{}}(n) has not been proved yet. We propose here an easily implemented route to the triangulation of simple polygons through the trapezoidization of simple polygons, which is currently done in O(n log n). Then the trapezoidized polygons are triangu- lated in O(n) time. Both of those steps can be performed on polygons with holes with the same complexity. We also show in this paper that a number of problems, such as the decomposition of simple polygons into convex, star, monotone, spiral, and trapezoidal polygons and the determination of edge- vertex visibility, are linearly equivalent to the triangulation problem and therefore share the same lower bound. It is hoped that this will simplify the task of reducing the gap between the lower and upper bound for these problems.},
author = {Fournier, A. and Montuno, D. Y.},
doi = {10.1145/357337.357341},
file = {:home/t.kuipers/Downloads/p153-fournier-triangulation.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
number = {2},
pages = {153--174},
title = {{Triangulating Simple Polygons and Equivalent Problems}},
volume = {3},
year = {1984}
}
@inproceedings{freudenberg2002real,
author = {Freudenberg, Bert and Masuch, Maic and Strothotte, Thomas},
booktitle = {Rendering Techniques},
file = {:home/t.kuipers/Downloads/Real-Time{\_}Halftoning{\_}A{\_}Primitive{\_}for{\_}Non-Photoreal.pdf:pdf},
pages = {227--232},
title = {{Real-time halftoning: a primitive for non-photorealistic shading}},
year = {2002}
}
@article{Gao2019,
author = {Gao, Jie and Xue, Huipeng and Gao, Liang and Luo, Zhen},
doi = {10.1016/j.cma.2019.04.021},
file = {:home/t.kuipers/Downloads/1-s2.0-S0045782519302245-main.pdf:pdf},
COMMENTEDissn = {0045-7825},
journal = {Computer Methods in Applied Mechanics and Engineering},
keywords = {auxetic metamaterials,homogenization,isogeometric analysis,topology optimization},
publisher = {Elsevier B.V.},
title = {{Topology optimization for auxetic metamaterials based on isogeometric analysis}},
COMMENTEDurl = {https://doi.org/10.1016/j.cma.2019.04.021},
year = {2019}
}
@article{Gao2015,
abstract = {Additive manufacturing (AM) is poised to bring about a revolution in the way products are designed, manufactured, and distributed to end users. This technology has gained significant academic as well as industry interest due to its ability to create complex geometries with customizable material properties. AM has also inspired the development of the maker movement by democratizing design and manufacturing. Due to the rapid proliferation of a wide variety of technologies associated with AM, there is a lack of a comprehensive set of design principles, manufacturing guidelines, and standardization of best practices. These challenges are compounded by the fact that advancements in multiple technologies (for example materials processing, topology optimization) generate a "positive feedback loop" effect in advancing AM. In order to advance research interest and investment in AM technologies, some fundamental questions and trends about the dependencies existing in these avenues need highlighting. The goal of our review paper is to organize this body of knowledge surrounding AM, and present current barriers, findings, and future trends significantly to the researchers. We also discuss fundamental attributes of AM processes, evolution of the AM industry, and the affordances enabled by the emergence of AM in a variety of areas such as geometry processing, material design, and education. We conclude our paper by pointing out future directions such as the "print-it-all" paradigm, that have the potential to re-imagine current research and spawn completely new avenues for exploration.},
author = {Gao, Wei and Zhang, Yunbo and Ramanujan, Devarajan and Ramani, Karthik and Chen, Yong and Williams, Christopher B. and Wang, Charlie C.L. and Shin, Yung C. and Zhang, Song and Zavattieri, Pablo D.},
doi = {10.1016/j.cad.2015.04.001},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448515000469-main.pdf:pdf},
isbn = {0010-4485},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {3D printing,Additive manufacturing,Intellectual property,Maker Movement,Open-source machine,Topology optimization},
month = {dec},
pages = {65--89},
pmid = {24918825},
publisher = {Elsevier},
title = {{The status, challenges, and future of additive manufacturing in engineering}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cad.2015.04.001 http://linkinghub.elsevier.com/retrieve/pii/S0010448515000469},
volume = {69},
year = {2015}
}
@article{Gardan2015,
abstract = {Rapid prototyping (RP) and more generally Additive Manufacturing (AM) enable the manufacture of complex geometries, which are very difficult to build with classical production. There are numerous technologies that are using different kind of material. For each of these, there are at least two materials: the production material and the support one. Support material is, in most cases, cleaned and becomes a manufacturing residue. Improve the material volume and the global mass of the product is an essential aim surrounding the integration of simulation in additive manufacturing process. Moreover the layer-by-layer technology of additive manufacturing allows the design of innovative objects and the use of topological optimization in this context can create a very interesting combination. The purpose of our paper is to present a methodology and a tool, which allow the use of topological optimization for the preparation of model for RP and AM.},
author = {Gardan, Nicolas and Schneider, Alexandre},
doi = {10.1016/j.jmsy.2014.07.003},
isbn = {0278-6125},
COMMENTEDissn = {02786125},
journal = {Journal of Manufacturing Systems},
keywords = {Additive manufacturing,Computer aided design (CAD),Computer aided engineering (CAE),Topological optimization},
pages = {417--425},
title = {{Topological optimization of internal patterns and support in additive manufacturing}},
volume = {37},
year = {2015}
}
@article{ISI:000387850900005,
author = {Gaynor, Andrew T and Guest, James K},
doi = {10.1007/s00158-016-1551-x},
COMMENTEDissn = {1615-147X},
journal = {STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION},
month = {nov},
number = {5, SI},
pages = {1157--1172},
title = {{Topology optimization considering overhang constraints: Eliminating sacrificial support material in additive manufacturing through design}},
volume = {54},
year = {2016}
}
@article{Gil-ureta2019,
archivePrefix = {arXiv},
arxivId = {arXiv:1904.12240v1},
author = {Gil-ureta, Francisca},
COMMENTEDeprint = {arXiv:1904.12240v1},
file = {:home/t.kuipers/Downloads/1904.12240.pdf:pdf},
number = {1},
title = {{Structurally optimized shells Input}},
volume = {1},
year = {2019}
}
@article{Gonzaga,
author = {Gonzaga, Sanderson and Federal, Oliveira Universidade and Kischinhevsky, Mauricio and Federal, Universidade and Methods, Efficient Numerical and Kischinhevsky, Mauricio},
file = {:home/t.kuipers/Downloads/Sierpinski-like{\_}Space-filling{\_}Curve{\_}for{\_}Total{\_}Orde.pdf:pdf},
number = {February 2015},
title = {{Sierp{\'{i}}nski-like Space-filling Curve for Total Ordering of Adaptive Triangular Discretized Domains}},
year = {2015}
}
@article{Gottschau2016,
abstract = {An {\$}r{\$}-gentiling is a dissection of a shape into {\$}r \backslashgeq 2{\$} parts which are all similar to the original shape. An {\$}r{\$}-reptiling is an {\$}r{\$}-gentiling of which all parts are mutually congruent. By applying gentilings recursively, together with a rule that defines an order on the parts, one may obtain an order in which to traverse all points within the original shape. We say such a traversal is a face-continuous space-filling curve if, at any level of recursion, the interior of the union of any set of consecutive parts is connected---that is, consecutive parts must always meet along an edge. Most famously, the isosceles right triangle admits a 2-reptiling, which forms the basis of the face-continuous Sierpinski space-filling curve; many other right triangles admit reptilings and gentilings that yield face-continuous space-filling curves as well. In this study we investigate what acute triangles admit non-trivial reptilings and gentilings, and whether these can form the basis for face-continuous space-filling curves. We derive several properties of reptilings and gentilings of acute (sometimes also obtuse) triangles, leading to the following conclusion: no face-continuous space-filling curve can be constructed on the basis of reptilings of acute triangles.},
archivePrefix = {arXiv},
arxivId = {1603.01382},
author = {Gottschau, Marinus and Haverkort, Herman and Matzke, Kilian},
COMMENTEDeprint = {1603.01382},
file = {:home/t.kuipers/Downloads/1603.01382.pdf:pdf},
pages = {1--22},
title = {{Reptilings and space-filling curves for acute triangles}},
COMMENTEDurl = {http://arxiv.org/abs/1603.01382},
year = {2016}
}
@article{Griffiths1994,
abstract = {An algorithm for generating a toolpath for a milling machine is described. The approach to its design was interdisciplinary. The algorithm contains ideas from computer graphics and mathematics, rather than mechanical engineering alone. An artefact described by any set of curved surfaces is carved out of a workpiece in two stages. Horizontal slices are removed to reveal the roughly cut artefact, and a final pass cuts the artefact to within a preset tolerance. The toolpath might seem to be needlessly convoluted, but it has substantial advantages over less sophisticated paths. Its local complexity adapts automatically to the local complexity of the artefact, so that more attention is concentrated on those parts of the artefact which require it. At the roughing out stage, the path efficiently skips over completely worked areas without retracing them with each new horizontal slice. The path minimizes the amount of tool movement which does not cut material, and minimizes the number of occassions on which the tool reenters the material. A prototype system has been developed to demonstrate that the new approach is viable. {\textcopyright} 1994.},
author = {Griffiths, J. G.},
doi = {10.1016/0010-4485(94)90098-1},
file = {:home/t.kuipers/Downloads/1-s2.0-0010448594900981-main.pdf:pdf},
isbn = {0010-4485},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {cutters,machining,toolpaths},
number = {11},
pages = {839--844},
title = {{Toolpath based on Hilbert's curve}},
volume = {26},
year = {1994}
}
@article{Groen2018,
archivePrefix = {arXiv},
arxivId = {arXiv:1808.04740v1},
author = {Groen, Jeroen P and Wu, Jun and Sigmund, Ole},
COMMENTEDeprint = {arXiv:1808.04740v1},
file = {:home/t.kuipers/Downloads/1808.04740.pdf:pdf},
keywords = {coated structures,high-resolution,homogenization,infill,topology optimization},
pages = {1--20},
title = {{Optimization and projection of coated structures with orthotropic infill material}},
year = {2018}
}
@article{Groen2018a,
abstract = {This paper presents a projection method to obtain high-resolution, manufacturable structures from efficient and coarse-scale homogenization-based topology optimiza-tion results. The presented approach bridges coarse and fine scale, such that the complex periodic microstructures can be represented by a smooth and continuous lattice on the fine mesh. A heuristic methodology allows control of the projected topology, such that a minimum length scale on both solid and void features is ensured in the final result. Numerical examples show excellent behavior of the method, where performances of the projected designs are almost equal to the homogenization-based solutions. A significant reduction in computational cost is observed compared to conventional topology optimization approaches.},
author = {Groen, Jeroen P. and Sigmund, Ole},
doi = {10.1002/nme.5575},
file = {:home/t.kuipers/Downloads/Groen{\_}et{\_}al-1148-International{\_}Journal{\_}for{\_}Numerical{\_}Methods{\_}in{\_}Engineering.pdf:pdf},
COMMENTEDissn = {10970207},
journal = {International Journal for Numerical Methods in Engineering},
keywords = {high-resolution,homogenization,manufacturing constraints,topology optimization},
number = {8},
pages = {1148--1163},
title = {{Homogenization-based topology optimization for high-resolution manufacturable microstructures}},
volume = {113},
year = {2018}
}
@article{ISI:000406570900002,
author = {Guo, Xu and Zhou, Jianhua and Zhang, Weisheng and Du, Zongliang and Liu, Chang and Liu, Ying},
doi = {10.1016/j.cma.2017.05.003},
COMMENTEDissn = {0045-7825},
journal = {COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING},
month = {aug},
pages = {27--63},
title = {{Self-supporting structure design in additive manufacturing through explicit topology optimization}},
volume = {323},
year = {2017}
}
@article{Gupta2019,
author = {Gupta, Ashish and Kurzeja, Kelsey and Rossignac, Jarek and Allen, George and Kumar, Pranav Srinivas and Musuvathy, Suraj},
doi = {10.1016/j.cad.2019.04.001},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448518303798-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
publisher = {Elsevier},
title = {{Programmed-Lattice Editor and accelerated processing of parametric program-representations of steady lattices}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S0010448518303798},
year = {2019}
}
@article{haghpanah2014buckling,
abstract = {One of Antwerp's most imposing buildings, now a Belgian national monument, the great domed Central Station recently had to sit on 148 high-pressure hydraulic jacks while tunneling engineers connected two lines of the city's new Metro network under a section of the building's foundations. It was a well-conceived operation carried out with considerable expertise, using the latest techniques and equipment.},
author = {{Haghpanah, Babak; Papadopoulos, Jim; Mousanezhad, Davood; Nayeb-Hashemi, Hamid; Vaziri}, Ashkan},
doi = {10.1098/rspa.2013.0856},
file = {:home/t.kuipers/Downloads/rspa20130856.pdf:pdf},
COMMENTEDissn = {14712946},
journal = {Hydraulic Pneumatic Mechanical Power},
number = {354},
pages = {154--156},
publisher = {The Royal Society},
title = {{Buckling of regular, chiral and hierarchical honeycombs under a general macroscopic stress state}},
volume = {30},
year = {2014}
}
@book{Hartmanis1973,
abstract = {Ketogenic diets (KDs), successfully used in the therapy of paediatric epilepsy for nearly a century, have recently shown beneficial effects also in cancer, obesity, diabetes, GLUT 1 deficiencies, hypoxia-ischemia, traumatic brain injuries, and neurodegeneration. The latter achievement designates aged individuals as optimal recipients, but concerns derive from possible age-dependent differences in KDs effectiveness. Indeed, the main factors influencing ketone bodies utilization by the brain (blood levels, transport mechanisms, catabolic enzymes) undergo developmental changes, although several reports indicate that KDs maintain some efficacy during adulthood and even during advanced aging. Encouraging results obtained in patients affected by age-related neurodegenerative diseases have prompted new interest on KDs' effect on the aging brain, also considering the poor efficacy of therapies currently used. However, recent morphological evidence in synapses of late-adult rats indicates that KDs consequences may be even opposite in different brain regions, likely depending on neuronal vulnerability to age. Thus, further studies are needed to design KDs specifically indicated for single neurodegenerative diseases, and to ameliorate the balance between beneficial and adverse effects in aged subjects. Here we review clinical and experimental data on KDs treatments, focusing on their possible use during pathological aging. Proposed mechanisms of action are also reported and discussed.},
author = {Hartmanis, J and Leeuwen, J Van},
booktitle = {Lecture Notes in Computer Science},
file = {:home/t.kuipers/Downloads/2004{\_}Book{\_}AlgorithmsESA2004.pdf:pdf},
isbn = {3540249796},
number = {3},
pages = {242},
title = {{Lecture Notes in Computer Science}},
COMMENTEDurl = {http://scholar.google.com/scholar?hl=en{\&}btnG=Search{\&}q=intitle:Lecture+Notes+in+Computer+Science{\#}2},
volume = {9},
year = {1973}
}
@article{Haverkort2010,
abstract = {This paper defines the Arrwwid number of a recursive tiling (or space-filling curve) as the smallest number w such that any ball Q can be covered by w tiles (or curve sections) with total volume O(vol(Q)). Recursive tilings and space-filling curves with low Arrwwid numbers can be applied to optimise disk, memory or server access patterns when processing sets of points in d-dimensional space. This paper presents recursive tilings and space-filling curves with optimal Arrwwid numbers. For d 3, we see that regular cube tilings and space-filling curves cannot have optimal Arrwwid number, and we see how to construct alternatives with better Arrwwid numbers.},
archivePrefix = {arXiv},
arxivId = {arXiv:1002.1843v1},
author = {Haverkort, Herman},
COMMENTEDeprint = {arXiv:1002.1843v1},
file = {:home/t.kuipers/Downloads/68-288-1-PB.pdf:pdf},
journal = {Arxiv preprint arXiv10021843},
number = {1},
pages = {1--28},
title = {{Recursive tilings and space-filling curves with little fragmentation}},
COMMENTEDurl = {http://arxiv.org/abs/1002.1843},
volume = {2},
year = {2010}
}
@article{Hebda2019,
abstract = {In recent years 3D printing has gained popularity amongst industry professionals and hobbyists alike, with many new types of Fused Filament Fabrication (FFF) apparatus types becoming available on the market. A massively overlooked component of FFF is the requirement for a simple method to calculate the geometries of polymer depositions extruded during the FFF process. Manufacturers have so far achieved adequate methods to calculate tool-paths through so called slicer software packages which calculate the required velocities of extrusion from prior knowledge and data. Presented here is a method for obtaining a series of equations for predicting height, width and cross-sectional area values for given processing parameters within the FFF process for initial laydown on to a glass surface.},
author = {Hebda, Michael and McIlroy, Claire and Whiteside, Ben and Caton-Rose, Fin and Coates, Phil},
doi = {10.1016/j.addma.2019.02.013},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860418308091-main.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Conservation of mass,Cross-sectional geometry,Fused filament fabrication},
number = {October 2018},
pages = {99--108},
publisher = {Elsevier},
title = {{A method for predicting geometric characteristics of polymer deposition during fused-filament-fabrication}},
COMMENTEDurl = {https://doi.org/10.1016/j.addma.2019.02.013},
volume = {27},
year = {2019}
}
@incollection{Hecht2001,
address = {San Francisco},
author = {Hecht, Eugene},
booktitle = {Optics},
chapter = {8},
edition = {4th Editio},
isbn = {978-0805385663},
publisher = {Addison-Wesley},
title = {{Chapter 8: Polarization}},
year = {2001}
}
@misc{heide2015method,
annote = {US Patent 8,983,643},
author = {Heide, Erik K},
publisher = {Google Patents},
title = {{Method for generating and building support structures with deposition-based digital manufacturing systems}},
year = {2015}
}
@article{Held2009,
abstract = {We introduce a new algorithm for generating a spiral tool path for high-speed machining of pockets without islands. The pocket may be an arbitrary simply-connected 2D shape bounded by straight-line segments and circular arcs. The tool path is generated by interpolating growing disks placed on the medial axis of the pocket. It starts inside the pocket and spirals out to the pocket boundary. The tool path is guaranteed to be free of self-intersections and allows machining of the pocket without tool retractions. The start point of the spiral may be chosen freely by the user anywhere within the pocket. Most importantly, the spiral tool path complies with a user-specified maximum cutting width. The output of our algorithm is a G1-continuous spiral path. However, in a post-processing step, a properly adapted variant of the recent "PowerApx" package [Heimlich M, Held M. Biarc approximation, simplification and smoothing of polygonal curves by means of Voronoi-based tolerance bands. International Journal of Computational Geometry {\&} Applications 2008;18(3):221-50] can be used to boost the tool path to C2-continuity. Our new algorithm was implemented and tested successfully on real-world data. We conclude our paper by an analysis of sample tool paths produced by our implementation. {\textcopyright} 2009 Elsevier Ltd. All rights reserved.},
author = {Held, Martin and Spielberger, Christian},
doi = {10.1016/j.cad.2009.04.002},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448509001031-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {HSM,Medial axis,Milling,Pocket machining,Smooth tool path,Spiral path,Voronoi diagram},
number = {7},
pages = {539--550},
publisher = {Elsevier},
title = {{A smooth spiral tool path for high speed machining of 2D pockets}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cad.2009.04.002},
volume = {41},
year = {2009}
}
@article{Heller2016,
abstract = {The viability of Fused Filament Fabrication (FFF) as an Additive Manufacturing (AM) method is improved by including discrete carbon fibers in the polymer feedstock. The resulting carbon fiber polymer composite enhances mechanical and thermal properties, where improvements are directly related to the orientation of the carbon fibers within the extruded polymer composite. Fiber orientation in the polymer melt is affected by the flow field which is defined by the melt flow geometry including flow in the nozzle convergence and extrudate swell. This paper presents a computational approach for modeling the polymer melt flow and the associated effects of nozzle geometry and extrudate swell on fiber orientation in the extruded polymer. The finite element method is used to evaluate Stokes flow in the axisymmetric flow field of an FFF nozzle. Fiber orientation tensors are calculated throughout the fluid domain using the Orthotropic Fitted Closure and the Folgar-Tucker isotropic fiber interaction model. The radial and axial modulus of the extruded polymer is then calculated from fiber orientation tensors within the composite at the nozzle exit. Fiber orientation along the extrudate axis is shown to increase due to elongation flow within the nozzle convergence zone and decrease in the extrudate swell such that the modulus of elasticity of the extruded polymer is moderately affected by extrudate swell and substantially affected by the nozzle geometry.},
author = {Heller, Blake P. and Smith, Douglas E. and Jack, David A.},
doi = {10.1016/J.ADDMA.2016.06.005},
file = {:home/t.kuipers/Downloads/Effects{\_}of{\_}extrude{\_}swell{\_}and{\_}nozzle{\_}geometry{\_}on{\_}fiber{\_}orientation.pdf:pdf},
COMMENTEDissn = {2214-8604},
journal = {Additive Manufacturing},
month = {oct},
pages = {252--264},
publisher = {Elsevier},
title = {{Effects of extrudate swell and nozzle geometry on fiber orientation in Fused Filament Fabrication nozzle flow}},
COMMENTEDurl = {https://www.sciencedirect.com/science/article/pii/S2214860416301166},
volume = {12},
year = {2016}
}
@inproceedings{Henle2016,
author = {Henle, Frederick},
file = {:home/t.kuipers/Downloads/Henle{\_}Fred-Space{\_}Filling{\_}Curves.pdf:pdf},
pages = {1--7},
title = {{Space-Filling Curves on Non-Periodic Tilings}},
volume = {12},
year = {2016}
}
@article{Hergel2015,
author = {Hergel, Jean and Lefebvre, Sylvain},
doi = {10.1111/cgf.12555},
COMMENTEDissn = {01677055},
journal = {Computer Graphics Forum},
month = {may},
number = {2},
pages = {229--238},
publisher = {Wiley/Blackwell (10.1111)},
title = {{3D Fabrication of 2D Mechanisms}},
COMMENTEDurl = {http://doi.wiley.com/10.1111/cgf.12555},
volume = {34},
year = {2015}
}
@article{Hergel2014,
abstract = {Fused Filament Fabrication is an additive manufacturing process by which a 3D object is created from plastic filament. The filament is pushed through a hot nozzle where it melts. The nozzle deposits plastic layer after layer to create the final object. This process has been popularized by the RepRap community. Several printers feature multiple extruders, allowing objects to be formed from multiple materials or colors. The extruders are mounted side by side on the printer carriage. However, the print quality suffers when objects with color patterns are printed - a disappointment for designers interested in 3D printing their colored digital models. The most severe issue is the oozing of plastic from the idle extruders: Plastics of different colors bleed onto each other giving the surface a smudged aspect, excess strings oozing from the extruder deposit on the surface, and holes appear due to this missing plastic. Fixing this issue is difficult: increasing the printing speed reduces oozing but also degrades surface quality - on large prints the required speed level become impractical. Adding a physical mechanism increases cost and print time as extruders travel to a cleaning station. Instead, we rely on software and exploit degrees of freedom of the printing process. We introduce three techniques that complement each other in improving the print quality significantly. We first reduce the impact of oozing plastic by choosing a better azimuth angle for the printed part. We build a disposable rampart in close proximity of the part, giving the extruders the opportunity to wipe oozing strings and refill with hot plastic. We finally introduce a toolpath planner avoiding and hiding most of the defects due to oozing, and seamlessly integrating the rampart. We demonstrate our technique on several challenging multiple color prints, and show that our tool path planner improves the surface finish of single color prints as well. {\textcopyright} 2014 The Author(s) Computer Graphics Forum {\textcopyright} 2014 The Eurographics Association and John Wiley {\&} Sons Ltd. Published by John Wiley {\&} Sons Ltd.},
author = {Hergel, Jean and Lefebvre, Sylvain},
doi = {10.1111/cgf.12318},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Hergel, Lefebvre - 2014 - Clean color Improving multi-filament 3D prints.pdf:pdf;:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Hergel, Lefebvre - 2014 - Clean color Improving multi-filament 3D prints(2).pdf:pdf},
isbn = {01677055},
COMMENTEDissn = {14678659},
journal = {Computer Graphics Forum},
month = {may},
number = {2},
pages = {469--478},
title = {{Clean color: Improving multi-filament 3D prints}},
COMMENTEDurl = {http://doi.wiley.com/10.1111/cgf.12318},
volume = {33},
year = {2014}
}
@article{hilbert1891ueber,
author = {Hilbert, David},
journal = {Mathematische Annalen},
number = {3},
pages = {459--460},
publisher = {Springer},
title = {{Ueber die stetige Abbildung einer Line auf ein Fl{\"{a}}chenst{\"{u}}ck}},
volume = {38},
year = {1891}
}
@article{ISI:000265654200008,
author = {Hiller, Jonathan and Lipson, Hod},
doi = {10.1108/13552540910943441},
COMMENTEDissn = {1355-2546},
journal = {RAPID PROTOTYPING JOURNAL},
number = {2},
pages = {137--149},
title = {{Design and analysis of digital materials for physical 3D voxel printing}},
volume = {15},
year = {2009}
}
@article{Hornus2017,
abstract = {Additive manufacturing technologies fabricate objects layer by layer, adding material on top of already solidified layers. A key challenge is to ensure that there is always something below the layer being fabricated: otherwise added material simply falls under the effect of gravity -- this is a critical issue with most technologies. 

This difficulty is typically treated differently for the interior and the exterior of an object: the exterior is supported through structures akin to scaffoldings that are removed afterwards, while the interior volume is filled with a sparse, self-supporting infill pattern. The infill acts as a support for the tops and also provides mechanical strength to the final print. However, as objects grow in size even sparse infills become prohibitively expensive in time and material usage, and if made too sparse they no longer provide the required support. This prevents printing large objects with empty interiors.

In this work we investigate how to compute as large as possible self-supporting empty cavities. Our technique is based on an iterated geometric carving algorithm, that is fast to compute and produces nested sets of inner walls. The walls have exactly the minimal printable thickness of the manufacturing process everywhere. Remarkably, our technique only manipulates two consecutive slices of the model at a time, sweeping through the model along the vertical direction, from top to bottom. 

We discuss an efficient, robust implementation in details, based on a filtered polygonal medial axis extraction and an exact polygon offsetting technique. 
Using our approach, we can print large parts on filament printers using as little as a single filament thickness, providing on order of magnitude reduction in print time and material use while $\backslash$textit{\{}guaranteeing{\}} printability.},
author = {Hornus, Samuel and Lefebvre, Sylvain},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Hornus, Lefebvre - 2017 - Iterative carving for self-supporting 3D printed cavities.pdf:pdf},
keywords = {FDM,additive manufacturing,cavity,cavit{\'{e}},fabrication additive,inner support,support},
month = {jul},
pages = {14},
publisher = {Inria Nancy - Grand Est},
title = {{Iterative carving for self-supporting 3D printed cavities}},
COMMENTEDurl = {https://hal.inria.fr/hal-01570330/},
year = {2017}
}
@article{Hornus2015,
abstract = {Additive manufacturing is a process by which a three dimensional object is 
created layer after layer, through selective deposition of material.
It often requires the automated generation of auxiliary shapes, to temporarily 
support the object, to protect its surface, or to carve inner cavities and 
reduce material usage.

In this context, we define a ``printable enclosure'' as a minimal volume
enclosing a given shape and whose boundary can be printed at the smallest 
possible thickness while ensuring proper bonding between layers.
Such an enclosure is well suited to serve as auxiliary structure for additive 
manufacturing: it is easy to print and require little material. In this
paper, we demonstrate its use on three different applications: enclosing a
print within protective walls that are close to the surface; generating large
inner cavities whose walls are printable, and finally modeling support 
structures that provide a dense support to the downward facing surfaces while 
vanishing as quickly as possible below the supported object.

We obtain the shape of an enclosure by considering constraints on its set of slices along 
horizontal planes. In practice, the set of slices is discrete and the 
constraints afford for an efficient sweep-like construction algorithm using 
morphological operations on the slices. We discuss the printability and 
optimality of the enclosures and their boundary walls.},
author = {Hornus, Samuel and Lefebvre, Sylvain and Dumas, J{\'{e}}r{\'{e}}mie and Claux, Fr{\'{e}}d{\'{e}}ric},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Hornus et al. - 2015 - Tight printable enclosures for additive manufacturing.pdf:pdf},
keywords = {additive manufacturing,enceinte,enclosure,fabrication additive,support},
pages = {22},
publisher = {Inria},
title = {{Tight printable enclosures for additive manufacturing}},
COMMENTEDurl = {https://hal.inria.fr/hal-01141706/},
year = {2015}
}
@article{Hornus2016b,
abstract = {Additive manufacturing is a process by which a three dimensional object is created layer after layer, through selective deposition of material. It often requires the automated generation of auxiliary shapes, to temporarily support the object, to protect its surface, or to carve inner cavities and reduce material usage. In this context, we define a printable enclosure as a minimal volume enclosing a given shape and whose boundary can be printed at the smallest possible thickness while ensuring proper bonding between layers. Such an enclosure is well suited to serve as auxiliary structure for additive manufacturing: it is easy to print and require little material. In this paper, we demonstrate its use on three different applications: enclosing a print within protective walls that are close to the surface; generating large inner cavities whose walls are printable, and finally modeling support structures that provide a dense support to the downward facing surfaces while vanishing as quickly as possible below the supported object. We obtain the shape of an enclosure by considering constraints on its set of slices along horizontal planes. In practice, the set of slices is discrete and the constraints afford for an efficient sweep-like construction algorithm using morphological operations on the slices. We discuss the printability and optimality of the enclosures and their boundary walls.},
author = {Hornus, Samuel and Lefebvre, Sylvain and Dumas, J{\'{e}}r{\'{e}}mie and Claux, Fr{\'{e}}d{\'{e}}ric},
doi = {10.2312/gdf.20161074},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Hornus et al. - 2016 - Tight printable enclosures and support structures for additive manufacturing.pdf:pdf;:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Hornus et al. - 2015 - Tight printable enclosures for additive manufacturing.pdf:pdf},
isbn = {978-3-03868-003-1},
journal = {Proceedings of the Eurographics Workshop on Graphics for Digital Fabrication},
keywords = {,3d printing,additive manufacturing,cavities,enceinte,enclosure,fabrication additive,support,support structure},
month = {may},
pages = {11--21},
publisher = {Eurographics Association},
title = {{Tight printable enclosures and support structures for additive manufacturing}},
COMMENTEDurl = {https://dl.acm.org/citation.cfm?id=3059594 https://hal.inria.fr/hal-01399931 https://hal.inria.fr/hal-01141706/},
year = {2016}
}
@inproceedings{hoskins2013continuous,
author = {Hoskins, Stephen and McCallion, Peter},
booktitle = {NIP {\&} Digital Fabrication Conference},
number = {1},
organization = {Society for Imaging Science and Technology},
pages = {244--248},
title = {{Continuous tone colour printing in two and a half dimensions through a combination of 19th century analogue methodologies and 3D printing}},
volume = {2013},
year = {2013}
}
@article{Hou2014,
abstract = {The work describes the manufacturing and testing of graded conventional/auxetic honeycomb cores. The graded honeycombs are manufactured using Kevlar woven fabric/914 epoxy prepreg using Kirigami techniques, which consist in a combination of Origami and ply-cut processes. The cores are used to manufacture sandwich panels for flatwise compression and edgewise loading. The compressive modulus and compressive strength of stabilized (sandwich) honeycombs are found to be higher than those of bare honeycombs, and with density-averaged properties enhanced compared to other sandwich panels offered in the market place. The modulus and strength of graded sandwich panel under quasi-static edgewise loading vary with different failure mode mechanisms, and offer also improvements towards available panels from open literature. Edgewise impact loading shows a strong directionality of the mechanical response. When the indenter impacts the auxetic portion of the graded core, the strong localization of the damage due to the negative Poisson's ratio effect contains significantly the maximum dynamic displacement of the sandwich panel. {\textcopyright} 2013 Elsevier Ltd. All rights reserved.},
author = {Hou, Y. and Neville, R. and Scarpa, F. and Remillat, C. and Gu, B. and Ruzzene, M.},
doi = {10.1016/j.compositesb.2013.10.084},
file = {:home/t.kuipers/Downloads/1-s2.0-S1359836813006598-main.pdf:pdf},
isbn = {1173315306},
COMMENTEDissn = {13598368},
journal = {Composites Part B: Engineering},
keywords = {A. Honeycomb,B. Impact behavior,B. Mechanical properties,E. Assembly},
pages = {33--42},
title = {{Graded conventional-auxetic Kirigami sandwich structures: Flatwise compression and edgewise loading}},
volume = {59},
year = {2014}
}
@misc{HP,
author = {HP},
title = {{HP Multi Jet Fusion technology}},
COMMENTEDurl = {h41367.www4.hpe.com/campaigns/ga/3dprinting/4AA5-5472ENW.pdf},
year = {2014}
}
@article{Huang2017,
abstract = {{\textcopyright} 2017 by ASME. High-speed machine tools typically provide high spindle speeds and feedrates to achieve an effective material removal rate (MRR). However, it is not possible to realize the full extent of their high-speed capabilities due to the sharp corners of toolpaths which are introduced by conventional machining strategies, such as contour- and direction-parallel toolpaths. To address this limitation, spiral toolpaths that can reduce the magnitude of sudden direction changes have been developed in previous researches. Nevertheless, for some pockets, the average radial cutting width is significantly decreased while the total length of the toolpath is significantly increased as compared to contour- and directionparallel toolpath. In this situation, spiral toolpath may take more machining time. To overcome these drawbacks, an aggressive spiral toolpath generation method based on the medial axis (MA) transformation is proposed in machining pocket without islands inside, which refers to no additional material inside the counter. The salient feature of this work is that it integrates the advantages of both conventional contour-parallel machining strategy and the existing spiral toolpath machining strategy. The cutting width at each MA point is determined based on the diameter of the locally inscribed circle (LIC) of the MA point and the topological structure of MA. A distance-constrained contour determination algorithm is utilized to calculate the toolpath for each pass. Finally, a circular arc transition strategy is used to transform all the isolated passes into a spiral toolpath. Experiments are conducted to show the effectiveness of the proposed method.},
author = {Huang, Nuodi and Lynn, Roby and Kurfess, Thomas},
doi = {10.1115/1.4035720},
file = {:home/t.kuipers/Downloads/manu{\_}139{\_}05{\_}051011.pdf:pdf},
COMMENTEDissn = {1087-1357},
journal = {Journal of Manufacturing Science and Engineering},
keywords = {envelope curve,medial axis,pocket machining,spiral toolpath},
number = {5},
COMMENTEDpages = {051011},
title = {{Aggressive Spiral Toolpaths for Pocket Machining Based on Medial Axis Transformation}},
volume = {139},
year = {2017}
}
@article{HUBER2013,
abstract = {This paper deals with the fast computation of straight skeletons of planar straight-line graphs (PSLGs) at an industrial-strength level. We discuss both the theoretical foun-dations of our algorithm and the engineering aspects of our implementation Bone. Our investigation starts with an analysis of the triangulation-based algorithm by Aichholzer and Aurenhammer and we prove the existence of flip-event-free Steiner triangulations. This result motivates a careful generalization of motorcycle graphs such that their inti-mate geometric connection to straight skeletons is maintained. Based on the generalized motorcycle graph, we devise a non-procedural characterization of straight skeletons of PSLGs and we discuss how to obtain a discretized version of a straight skeleton by means of graphics rendering. Most importantly, this generalization allows us to present a fast and easy-to-implement straight-skeleton algorithm. We implemented our algorithm in C ++ based on floating-point arithmetic. Extensive benchmarks with our code Bone demonstrate an O(n log n) time complexity and O(n) memory footprint on 22 300 datasets of diverse characteristics. This is a linear factor better than the implementation provided by CGAL 4.0, which shows an O(n 2 log n) time complexity and an O(n 2) memory footprint; the CGAL code has been the only fully-functional straight-skeleton code so far. In particular, on datasets with ten thousand vertices, Bone requires about 0.2–0.6 seconds instead of 4–7 minutes consumed by the CGAL code, and Bone uses only 20 MB heap memory instead of several gigabytes. We conclude our paper with a discussion of the engineering aspects and principles that make Bone reliable enough to compute the straight skeleton of datasets comprising a few million vertices on a desktop computer.},
author = {HUBER, STEFAN and HELD, MARTIN},
doi = {10.1142/s0218195912500124},
file = {:home/t.kuipers/Downloads/huber2012.pdf:pdf},
COMMENTEDissn = {0218-1959},
journal = {International Journal of Computational Geometry {\&} Applications},
number = {05},
pages = {471--498},
title = {{a Fast Straight-Skeleton Algorithm Based on Generalized Motorcycle Graphs}},
volume = {22},
year = {2013}
}
@inproceedings{iliescu2009z,
author = {Iliescu, Mihaiela and Nutu, Emil and Tabeshfar, Kamran and Ispas, Constantin},
booktitle = {Proceedings of the 2nd WSEAS International Conference on Sensors, and Signals and Visualization, Imaging and Simulation and Materials Science},
organization = {World Scientific and Engineering Academy and Society (WSEAS)},
pages = {148--153},
title = {{Z Printing Rapid Prototyping Technique and SolidWorks Simulation--Major Tools in New Product Design}},
year = {2009}
}
@article{im2002functional,
author = {Im, Y G and Chung, S I and Son, J H and Jung, Y D and Jo, J G and Jeong, H D},
file = {:home/t.kuipers/Downloads/1-s2.0-S0924013602008269-main.pdf:pdf},
journal = {Journal of materials processing technology},
pages = {372--377},
publisher = {Elsevier},
title = {{Functional prototype development: inner visible multi-color prototype fabrication process using stereo lithography}},
volume = {130},
year = {2002}
}
@article{Jadoon2018,
abstract = {In this paper, we present an easy, flexible and interactive tool for partitioning a 3D model, which is larger than 3D-printer's working volume, into printable parts in an intuitive way. Our presented tool is based on the elegant partitioning optimization framework Chopper. Our tool aims at improving Chopper by providing users three easy-to-use interactive operations: no-go region painting, cutting plane specification and components re-union. With these operations, we show that (1) exhaustive search in the BSP tree ---the most time-consuming step in Chopper ---can be avoided, (2) more flexible geometric configurations can be provided, (3) user's design intention is considered naturally and efficiently, and customized 3D partitioning results can be obtained. We test our tool on a wide range of 3D models and observe promising results. A preliminary user study also demonstrates its effectiveness and efficiency.},
author = {Jadoon, Aamir Khan and Wu, Chenming and Liu, Yong Jin and He, Ying and Wang, Charlie C.L.},
doi = {10.1109/MCG.2018.182130719},
file = {:home/t.kuipers/Downloads/08402193.pdf:pdf},
COMMENTEDissn = {02721716},
journal = {IEEE Computer Graphics and Applications},
keywords = {Choppers (circuits),Computational modeling,Linear programming,Printing,Solid modeling,Three-dimensional displays,Tools,computational geometry and object modeling,computer graphics,computing methodologies,curve, surface, solid, and object representations,graphics utilities,interaction techniques,methodology and techniques},
number = {August},
pages = {38--53},
publisher = {IEEE},
title = {{Interactive Partitioning of 3D Models into Printable Parts}},
volume = {38},
year = {2018}
}
@article{Jaiswal2019,
abstract = {The onset of affordable AM printers has democratized digital manufacturing and enabled rapid growth of the AM industry. The recent advancement of AM technology has allowed for fabrication of highly complex parts that were difficult to produce using traditional manufacturing techniques. However, designers and novice users of additive technologies often lack the awareness of manufacturing considerations leading to lower quality parts and print failures. Therefore, it is crucial to develop an automated system that can analyze and correct designs before they are sent for fabrication so that wasteful iterations of build–test–redesign can be minimized. This paper outlines fundamental geometric reasoning algorithms to enable 3D print quality assessment. The developed algorithms computationally recognize potential printing problems in a given 3D model and suggest automatic local geometric changes to the 3D model to rectify the identified printing problems. The potential problems are identified using variations of shape diameter function and morphological operations. Also, a physics-based mesh deformation scheme is developed to make localized corrections to slices for improving printability. The utility of the developed approach has been demonstrated on both 2D slice and 3D model level corrections.},
author = {Jaiswal, Prakhar and Rai, Rahul},
doi = {10.1016/j.cad.2018.12.001},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448518300678-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {Additive manufacturing,Manufacturability,Mathematical morphology,Model correction,Shape diameter function},
pages = {1--11},
publisher = {Elsevier},
title = {{A geometric reasoning approach for additive manufacturing print quality assessment and automated model correction}},
COMMENTEDurl = {https://doi.org/10.1016/j.cad.2018.12.001},
volume = {109},
year = {2019}
}
@article{Jarvis1976,
abstract = {Many displays are basically bilevel in nature with individual display cells, all of the same size, arranged in a rectangular array. We present a survey of processing techniques for presenting continuous tone still images on such displays. Four techniques are covered in detail while several others are covered briefly. All the techniques achieve the subjective effect of continuous tone by properly controlling only the spatial density of bilevel display states. The processing techniques consist of dividing an image into picture elements and comparing the intensity of each element with a threshold value. If the element intensity is greater than the threshold, the corresponding display cell is set to the bright state; otherwise, the cell is set to the dark state. In the ordered-dither technique, the threshold is spatially dependent, i.e., it is determined only by the coordinates of the element being processed. In the remaining three techniques, constrained average, dynamic threshold, and minimized average error, the threshold is determined by values of elements close to the one currently being processed. The latter three thus require more processing and more storage than the first, but allow some edge emphasis. Images processed by all the described techniques are exhibited. {\textcopyright} 1976 Academic Press, Inc.},
author = {Jarvis, J. F. and Judice, C. N. and Ninke, W. H.},
doi = {10.1016/S0146-664X(76)80003-2},
file = {:home/t.kuipers/Downloads/jarvis{\_}-{\_}a{\_}survey{\_}of{\_}techniques{\_}for{\_}the{\_}display{\_}of{\_}continuous{\_}tone{\_}pictures{\_}on{\_}bilevel{\_}displays.pdf:pdf},
COMMENTEDissn = {0146664X},
journal = {Computer Graphics and Image Processing},
number = {1},
pages = {13--40},
title = {{A survey of techniques for the display of continuous tone pictures on bilevel displays}},
volume = {5},
year = {1976}
}
@article{Jiang2019,
abstract = {ABSTRACTAdditive manufacturing (AM) is becoming increasingly popular because of its unique advantages. However, AM still suffers from support material waste during the fabrication process when overhanging features exist. Plenty of research has been carried out for minimising support usage. However, former studies only focused on the optimisation for a single part fabrication. In this paper, a four-step strategy of multi-part production for reducing support consumption in AM is proposed. When printing a group of parts in the same build vat or chamber, the proposed strategy optimises the print orientation for each part, combines every two parts based on the geometries, proposes several possible multi-part combinations, and then selects the optimal part positions for fabrication. Two case studies are carried out for verification. The results show that the four-step strategy can significantly reduce the support waste and total fabrication time.},
author = {Jiang, Jingchao and Xu, Xun and Stringer, Jonathan},
doi = {10.1080/17452759.2019.1585555},
file = {:home/t.kuipers/Downloads/publishedversion.pdf:pdf},
COMMENTEDissn = {17452767},
journal = {Virtual and Physical Prototyping},
keywords = {Additive manufacturing,multi-part production,support waste},
number = {0},
pages = {1--10},
publisher = {Taylor {\&} Francis},
title = {{Optimisation of multi-part production in additive manufacturing for reducing support waste}},
COMMENTEDurl = {https://doi.org/10.1080/17452759.2019.1585555},
volume = {0},
year = {2019}
}
@inproceedings{Jin2013adaptive,
author = {Jin, Yu An and He, Yong and Fu, Jian Zhong},
title = {An Adaptive Tool Path Generation for Fused Deposition Modeling},
year = {2013},
month = {Sept},
volume = {819},
pages = {7--12},
booktitle = {Advanced Materials Research},
doi = {10.4028/www.scientific.net/amr.819.7},
keywords = {Tool Path Generation, FDM, Adaptive Slicing, Tool Path Adjustment}
}
@article{Jin2017JMS,
abstract = {The emergence of Additive Manufacturing (AM) technologies brings in the reduction of material consumption in terms of avoiding the repeated fabrication of dies as well as comparatively high material efficiency. However, despite of widespread application and evident advantages over conventional manufacturing techniques, AM still suffers from long lead time and redundant material usage when fabricating large-volume solid objects. This fact would definitely restrict the diffusion of AM technology. Based on this, a design strategy is proposed in this paper from the perspective of process planning focusing on the material consumption in additive manufacturing of relatively large-volume solid parts. Instead of processing the digital models directly, the sliced data of digital models is adopted for the design and optimization, and finally outputting the paths driving the AM machine to realize the practical fabrication. The sliced contours of the model are obtained based on a given layer thickness at first. Subsequently, the areas to be filled on each layer are determined according to the input contours and the self-supporting capability of the material. The interior regions confined by the generated internal contours do not need to be filled necessarily because they have no effect on the parts' geometry and the materials can be saved accordingly. At last, a skeleton-based path planning method is utilized to address the long and narrow geometry to improve the deposition performance and surface quality. Several tests are used to verify the proposed strategy and the results show its effectiveness and feasibility in reducing the material consumption, enabling AM to be a more environmental friendly and sustainable manufacturing method.},
author = {Jin, Yuan and Du, Jianke and He, Yong},
doi = {10.1016/j.jmsy.2017.05.003},
file = {:home/t.kuipers/Downloads/1-s2.0-S0278612517300924-main.pdf:pdf},
COMMENTEDissn = {02786125},
journal = {Journal of Manufacturing Systems},
keywords = {Additive manufacturing,Material consumption,Self-support,Skeleton-based path,Sliced data},
pages = {65--78},
publisher = {The Society of Manufacturing Engineers},
title = {{Optimization of process planning for reducing material consumption in additive manufacturing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.jmsy.2017.05.003},
volume = {44},
year = {2017}
}
@article{Jin2017a,
abstract = {Extrusion-based layered deposition is one of the widely used additive manufacturing (AM) technologies due to its flexibility and capability in producing prototypes without geometrical complexity limitations. One of the most important steps in determining the part quality and build time is the path planning, where the trajectory for guiding the extruder is defined by various aspects prior to actual deposition. In this paper, a novel methodology is presented to generate the deposition path for the extrusion-based AM of thin-walled parts, which is difficult to obtain desirable deposition quality using general filling paths. A wavy path pattern is adopted to fill the long and narrow cross-sections that are obtained from the slicing procedure of the thin-walled parts. This novel filling pattern can bring in better deposition results and has more excellence in enhancing the efficiency. The algorithms are proposed for the generation of wavy paths at first. Then, several implementations and optimisation methods are proposed to address some issues and extend its application. Finally, two cases are used to verify the developed methodology, and the comparison analysis demonstrates its evident advantages over traditional filling path in the fabrication efficiency for the extrusion-based additive fabrication of thin-walled objects. {\textcopyright} 2017 Informa UK Limited, trading as Taylor {\&} Francis Group.},
author = {Jin, Yuan and He, Yong and Du, Jianke},
doi = {10.1080/0951192X.2017.1307526},
file = {:home/t.kuipers/Downloads/jin2017(1).pdf:pdf},
COMMENTEDissn = {13623052},
journal = {International Journal of Computer Integrated Manufacturing},
keywords = {extrusion-based additive manufacturing,path planning,thin-walled parts,wavy path},
number = {12},
pages = {1301--1315},
publisher = {Taylor {\&} Francis},
title = {{A novel path planning methodology for extrusion-based additive manufacturing of thin-walled parts}},
COMMENTEDurl = {http://dx.doi.org/10.1080/0951192X.2017.1307526},
volume = {30},
year = {2017}
}
@article{Jin2017RCIM,
abstract = {Notwithstanding the widespread use and large number of advantages over traditional subtractive manufacturing techniques, the application of additive manufacturing technologies is currently limited by the undesirable fabricating efficiency, which has attracted attentions from a wide range of areas, such as fabrication method, material improvement, and algorithm optimization. As a critical step in the process planning of additive manufacturing, path planning plays a significant role in affecting the build time by means of determining the paths for the printing head's movement. So a novel path filling pattern for the deposition of extrusion–based additive manufacturing is developed in this paper, mainly to avoid the retraction during the deposition process, and hence the time moving along these retracting paths can be saved and the discontinuous deposition can be avoided as well. On the basis of analysis and discussion of the reason behind the occurrence of retraction in the deposition process, a path planning strategy called “go and back” is presented to avoid the retraction issue. The “go and back” strategy can be adopted to generate a continuous extruder path for simple areas with the start point being connected to the end point. So a sliced layer can be decomposed into several simple areas and the sub-paths for each area are generated based on the proposed strategy. All of these obtainable sub-paths can be connected into a continuous path with proper selection of the start point. By doing this, separated sub-paths are joined with each other to decrease the number of the startup and shutdown process for the extruder, which is beneficial for the enhancement of the deposition quality and the efficiency. Additionally, some methodologies are proposed to further optimize the generated non-retraction paths. At last, several cases are used to test and verify the developed methodology and the comparisons with conventional path filling patterns are conducted. The results show that the proposed approach can effectively reduce the retraction motions and is especially beneficial for the high efficient additive manufacturing without compromise on the part resistance.},
author = {Jin, Yuan and He, Yong and Fu, Guoqiang and Zhang, Aibing and Du, Jianke},
doi = {10.1016/j.rcim.2017.03.008},
file = {:home/t.kuipers/Downloads/jin2017.pdf:pdf},
isbn = {0736-5845},
COMMENTEDissn = {07365845},
journal = {Robotics and Computer-Integrated Manufacturing},
keywords = {Additive manufacturing,Fabrication efficiency,Non-retraction,Optimization method,Path planning},
  volume={48},
  pages={132--144},
  year={2017},
publisher = {Elsevier},
title = {{A non-retraction path planning approach for extrusion-based additive manufacturing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.rcim.2017.03.008}
}
@article{joan1999computing,
author = {{Joan Arinyo}, Robert and {P{\'{e}}rez Vidal}, Llu$\backslash$'$\backslash$is Llu{\$}\backslash{\$}'{\$}\backslash{\$}is and {Vilaplana Pasto}, Josep and Joan-Arinyo, R and P{\'{e}}rez, L and Vilaplana, J and {Joan Arinyo}, Robert and {P{\'{e}}rez Vidal}, Llu$\backslash$'$\backslash$is Llu{\$}\backslash{\$}'{\$}\backslash{\$}is and {Vilaplana Pasto}, Josep},
file = {:home/t.kuipers/Downloads/R99-8.pdf:pdf;:home/t.kuipers/Downloads/R99-8.ps:ps},
pages = {1--13},
title = {{Computing the medial axis transform of polygonal domains by tracing paths}},
COMMENTEDurl = {http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.41.3080},
year = {1999}
}
@misc{johnson2014clipper,
author = {Johnson, Angus},
title = {{Clipper 6.4.2 - an open source freeware library for clipping and offsetting lines and polygons}},
year = {2017},
version = {6.4.2}
}
@article{Johnson2018,
abstract = {Additive Manufacturing (AM) professionals often throw around the notion that complexity is free. Indeed, complexity is much easier and potentially cheaper to achieve through AM than through traditional manufacturing, but it is not free. Upon attempting to manufacture complex designs, it is quickly found that certain features, or topologies, are more manufacturable than others, with sacrificial support material required for many complex designs. This will significantly increase machining costs. Topology Optimization (TO) is a freeform computational design methodology which is ideal for designing lightweight structures through a combination of modeling and rigorous optimization. While AM can realize many complex topologies, there still remain AM manufacturing limitations (such as overhangs), which require customized TO design algorithms beyond freeform TO. In this work, a projection-based TO methodology is presented to design for 3D self-supporting structures – i.e. structures that do not require sacrificial support material. The foundation of the presented methodology is a 2D overhang projection framework. In addition to expanding the methodology to three dimensions, the algorithm is drastically improved through (1) adopting a new overhang mapping scheme which allows for exact specification of allowable overhang angle, and (2) implementing an adjoint approach to sensitivity calculations to speed up calculation drastically and to allow for scalability. Using several examples, it is shown that the presented methodology generates self-supporting structures (given a prescribed printable overhang angle) which are entirely manufacturable without any added sacrificial support material. Upon printing a couple topologies with mixed success, further customization of the algorithm is proposed for situations where multiple directional-dependent overhang angles are possible in a single AM system.},
author = {Johnson, Terrence E. and Gaynor, Andrew T.},
doi = {10.1016/j.addma.2018.06.011},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860417303846-main.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Anchors,Design for additive manufacturing,Overhang features,Projection methods,Self-supporting,design for additive manufacturing},
number = {June},
pages = {0--1},
publisher = {Elsevier},
title = {{Three-dimensional Projection-based Topology Optimization for Prescribed-angle Self-Supporting Additively Manufactured Structures}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S2214860417303846},
year = {2018}
}
@article{Kadkhodapour2016,
author = {Kadkhodapour, J},
doi = {10.1016/j.jmbbm.2016.05.027},
file = {:home/t.kuipers/Downloads/afshar2016.pdf:pdf},
COMMENTEDissn = {1751-6161},
journal = {Journal of the Mechanical Behavior of Biomedical Materials},
keywords = {Additive manufacturing,Failure mechanism,Graded porous structures,Minimal surfaces},
publisher = {Elsevier},
title = {{Author ' s Accepted Manuscript}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.jmbbm.2016.05.027},
year = {2016}
}
@inproceedings{kao1998optimal,
author = {Kao, Ju-hsien and Prinz, Fritz B},
booktitle = {Proceedings of DETC},
file = {:home/t.kuipers/Downloads/10.1.1.12.860.pdf:pdf},
organization = {Citeseer},
pages = {13--16},
title = {{Optimal motion planning for deposition in layered manufacturing}},
volume = {98},
year = {1998}
}
@article{ISI:000379835700005,
abstract = {Purpose In Additive manufacturing process, the physical properties of the products made by fractal toolpaths are better as compared to those made by conventional toolpaths. Also it is desirable to minimise the number of tool retractions. This work describes three different methods to generate fractal-based CNC toolpath for area filling of a closed curve with minimum or zero tool retractions. Design/methodology/approach This work describes three different methods to generate fractal-based CNC toolpath for area filling of a closed curve with minimum or zero tool retractions. In first method a large fractal square is placed over the outer boundary and then rest of the unwanted curve is trimmed out. To reduce the number of retractions, ends of the trimmed toolpath are connected in such a way that overlapping within the existing toolpath is avoided. In second method the trimming of the fractal is similar to the first method but the ends of trimmed toolpath are connected such that the overlapping is found at the boundaries only. The toolpath in third method is a combination of fractal and zigzag curves. This toolpath is capable of filling a given connected area in a single pass without any tool retraction and toolpath overlap within a tolerance value equal to stepover of the toolpath. Findings The generated toolpath has several applications in Additive Manufacturing and constant Z-height surface finishing. Experiments have been performed to verify the toolpath by depositing material by Hybrid Layered Manufacturing process. Research limitations/implications Third toolpath method is suitable for the Hybrid Layered Manufacturing process only because the toolpath overlapping tolerance may not be enough for other Additive Manufacturing processes. Originality/value Development of a CNC toolpath for Additive Manufacturing Specifically Hybrid Layered Manufacturing which can completely fill any arbitrary connected area in single pass while maintaining a constant stepover.},
author = {Kapil, Sajan and Joshi, Prathamesh and Yagani, Hari Vithasth and Rana, Dhirendra and Kulkarni, Pravin Milind and Kumar, Ranjeet and Karunakaran, K.P.},
doi = {10.1108/RPJ-03-2015-0034},
isbn = {1355-2546},
COMMENTEDissn = {1355-2546},
journal = {Rapid Prototyping Journal},
number = {4},
pages = {660--675},
title = {{Optimal space filling for additive manufacturing}},
COMMENTEDurl = {http://www.emeraldinsight.com/doi/10.1108/RPJ-03-2015-0034},
volume = {22},
year = {2016}
}
@article{Kaplan2005a,
abstract = {I Bosch and Herman recently described how to use the traveling salesman{\$}\backslashbackslash{\{}\backslash{\$}{\}}nproblem (TSP) to construct a continuous line drawing based on a user-supplied{\$}\backslashbackslash{\{}\backslash{\$}{\}}nimage. They create a distribution of cities that approximates the{\$}\backslashbackslash{\{}\backslash{\$}{\}}ndarkness of the source image, and pass the cities to a heuristic{\$}\backslashbackslash{\{}\backslash{\$}{\}}nTSP solver. We discuss their method and present alternative algorithms{\$}\backslashbackslash{\{}\backslash{\$}{\}}nfor city distribution that yield more attractive line drawings.},
author = {Kaplan, Craig S and Bosch, Robert},
file = {:home/t.kuipers/Downloads/kaplan{\_}bridges2005b.pdf:pdf},
journal = {Proceedings of Bridges 2005, Mathematical Connections in Art, Music and Science},
number = {Section 3},
title = {{TSP Art}},
COMMENTEDurl = {http://www.cgl.uwaterloo.ca/{\%}7B{\%}7B{~}{\%}7D{\%}7Dcsk/projects/tsp/ http://www.cgl.uwaterloo.ca/{\%}7B{~}{\%}7Dcsk/projects/tsp/ http://www.cgl.uwaterloo.ca/{~}csk/projects/tsp/},
year = {2005}
}
@article{Khoda2013,
abstract = {A novel tissue scaffold design technique has been proposed with controllable heterogeneous architecture design suitable for additive manufacturing processes. The proposed layer-based design uses a bi-layer pattern of radial and spiral layers consecutively to generate functionally gradient porosity, which follows the geometry of the scaffold. The proposed approach constructs the medial region from the medial axis of each corresponding layer, which represents the geometric internal feature or the spine. The radial layers of the scaffold are then generated by connecting the boundaries of the medial region and the layer's outer contour. To avoid the twisting of the internal channels, reorientation and relaxation techniques are introduced to establish the point matching of ruling lines. An optimization algorithm is developed to construct sub-regions from these ruling lines. Gradient porosity is changed between the medial region and the layer's outer contour. Iso-porosity regions are determined by dividing the sub-regions peripherally into pore cells and consecutive iso-porosity curves are generated using the iso-points from those pore cells. The combination of consecutive layers generates the pore cells with desired pore sizes. To ensure the fabrication of the designed scaffolds, the generated contours are optimized for a continuous, interconnected, and smooth deposition path-planning. A continuous zig-zag pattern deposition path crossing through the medial region is used for the initial layer and a biarc fitted iso-porosity curve is generated for the consecutive layer with C1 continuity. The proposed methodologies can generate the structure with gradient (linear or non-linear), variational or constant porosity that can provide localized control of variational porosity along the scaffold architecture. The designed porous structures can be fabricated using additive manufacturing processes. {\textcopyright} 2013 Elsevier Ltd. All rights reserved.},
annote = {sparse microstructures based on MAT},
author = {Khoda, A. K.M. and Ozbolat, Ibrahim T. and Koc, Bahattin},
doi = {10.1016/j.cad.2013.07.003},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448513001279-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {Additive manufacturing,Biarc fitting,Continuous path planning,Gradient porosity,Medial axis,Scaffold architecture},
number = {12},
pages = {1507--1523},
publisher = {Elsevier},
title = {{Designing heterogeneous porous tissue scaffolds for additive manufacturing processes}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cad.2013.07.003},
volume = {45},
year = {2013}
}
@article{ISI:000398243900009,
abstract = {Hierarchical structures, also known as fractal structures, exhibit advantageous material properties, such as water- and oil-repellency as well as other useful optical characteristics, owing to its self similarity. Various methods have been developed for producing hierarchical geometrical structures. Recently, fractal structures have been manufactured using a 3D printing technique that involves computer aided design data. In this study, we confirmed the accuracy of geometrical structures when Koch curve-like fractal structures with zero to three generations were printed using a 3D printer. The fractal dimension was analyzed using a box-counting method. This analysis indicated that the fractal dimension of the third generation hierarchical structure was approximately the same as that of the ideal Koch curve. These findings demonstrate that the design and production of fractal structures can be controlled using a 3D printer. Although the interior angle deviated from the ideal value, the side length could be precisely controlled. {\textcopyright} 2017 by Japan Oil Chemists' Society.},
author = {Kikegawa, Kana and Takamatsu, Kyuuichirou and Kawakami, Masaru and Furukawa, Hidemitsu and Mayama, Hiroyuki and Nonomura, Yoshimune},
doi = {10.5650/jos.ess16151},
COMMENTEDissn = {1345-8957},
journal = {Journal of Oleo Science},
month = {apr},
number = {4},
pages = {383--389},
title = {{Evaluation of 3D Printer Accuracy in Producing Fractal Structure}},
COMMENTEDurl = {https://www.jstage.jst.go.jp/article/jos/66/4/66{\_}ess16151/{\_}article},
volume = {66},
year = {2017}
}
@article{Kim2018,
abstract = {The FDM (Fused Deposition Modeling) technology is widely used due to its low process cost and good mechanical properties. However, fabricated parts have relatively inferior surface roughness compared to liquid material type process such as SL (Stereolithography). In this research, effects of fabrication parameters such as the gap between nozzle and substrate, inflow speed of filament material and heating moving speed of nozzle on the FDM-fabricated line figuration was investigated experimentally. The extruded line figurations such as width, thickness and cross-sectional shapes were examined. An empirical formula of the line fabrication for fabrication parameters was made based on the experimental results. Moreover, effect of line fabrication distance on the surface roughness was studied.},
author = {Kim, Min Kyung and Lee, In Hwan and Kim, Ho-Chan},
doi = {10.1007/s12541-018-0016-0},
COMMENTEDissn = {2005-4602},
journal = {International Journal of Precision Engineering and Manufacturing},
month = {jan},
number = {1},
pages = {137--142},
title = {{Effect of fabrication parameters on surface roughness of FDM parts}},
COMMENTEDurl = {https://doi.org/10.1007/s12541-018-0016-0},
volume = {19},
year = {2018}
}
@article{ISI:000410686100163,
annote = {5th International Conference on Materials Processing and
Characterization (ICMPC), GRIET, Hyderabad, INDIA, MAR 12-13, 2016},
author = {Krishna, L Siva Rama and Mahesh, Natrajan and Sateesh, N},
COMMENTEDissn = {2214-7853},
journal = {MATERIALS TODAY-PROCEEDINGS},
number = {2, A},
pages = {1414--1422},
title = {{Topology optimization using solid isotropic material with penalization technique for additive manufacturing}},
volume = {4},
year = {2017}
}
@article{Kuffner2009,
author = {Kuffner, James J and Lavalle, Steven M},
file = {:home/t.kuipers/Downloads/KufLav{\_}space{\_}filling{\_}trees{\_}TR2009.pdf:pdf},
number = {Figure 3},
title = {{Space-Filling Trees}},
year = {2009}
}
@article{Kuipers2018,
abstract = {{\textcopyright} 2018 Elsevier Ltd This work presents a halftoning technique to manufacture 3D objects with the appearance of continuous grayscale imagery for Fused Deposition Modeling (FDM) printers. While droplet-based dithering is a common halftoning technique, this is not applicable to FDM printing, since FDM builds up objects by extruding material in semi-continuous paths. The line-based halftoning principle called ‘hatching' is applied to the line patterns naturally occurring in FDM prints, which are built up in a layer-by-layer fashion. The proposed halftoning technique is not limited by the challenges existing techniques face; existing FDM coloring techniques greatly influence the surface geometry and deteriorate with surface slopes deviating from vertical or greatly influence the basic parameters of the printing process and thereby the structural properties of the resulting product. Furthermore, the proposed technique has little effect on printing time. Experiments on a dual-nozzle FDM printer show promising results. Future work is required to calibrate the perceived tone.},
author = {Kuipers, T. and Elkhuizen, W. and Verlinden, J. and Doubrovski, E.},
doi = {10.1016/j.cag.2018.04.006},
file = {:home/t.kuipers/Downloads/1-s2.0-S0097849318300578-main(1).pdf:pdf},
COMMENTEDissn = {00978493},
  journal={Computers \& Graphics},
keywords = {3D printing,Color,Fused deposition modeling,Grayscale,Halftone,Hatching},
title = {{Hatching for 3D prints: Line-based halftoning for dual extrusion fused deposition modeling}},
volume = {74},
  pages={23--32},
  publisher={Elsevier},
year = {2018}
}
@inproceedings{kuipers20173d,
abstract = {{\textcopyright} 2017 Copyright held by the owner/author(s). This work presents halftoning techniques to manufacture 3D objects with the appearance of full grayscale imagery for Fused Deposition Modeling (FDM) printers. While droplet-based dithering is a common halftoning technique, this is not applicable to FDM printing, since FDM builds up objects by extruding material in semi-continuous paths. A set of three methods is presented which apply a linear halftoning principle called 'hatching' to horizontal, vertical and diagonal surfaces. These methods are better suited to FDM compared to other halftoning methods: their applicability stands irrespective of the geometry and surface slope and the perceived tone is less sensitive to the viewing angle. Furthermore, the methods have little effect on printing time. Experiments on a dual-nozzle FDM printer show promising results. Future work is required to optimize the interaction between the presented methods.},
author = {Kuipers, Tim and Doubrovski, Eugeni and Verlinden, Jouke},
booktitle = {Proceedings of the 1st Annual ACM Symposium on Computational Fabrication},
doi = {10.1145/3083157.3083163},
file = {:home/t.kuipers/Downloads/a2-kuipers.pdf:pdf},
isbn = {9781450349994},
keywords = {,3D printing,Color,Dithering,Dual extrusion,Engraving,FDM,Grayscale,Halftone,Hatching,Linear,Monochrome,Tone},
organization = {ACM},
pages = {2},
title = {{3D hatching: linear halftoning for dual extrusion fused deposition modeling}},
year = {2017}
}
@article{KUIPERS2019CAD,
abstract = {The fabrication flexibility of 3D printing has sparked a lot of interest in designing structures with spatially graded material properties. In this paper, we propose a new type of density graded structure that is particularly designed for 3D printing systems based on filament extrusion. In order to ensure high-quality fabrication results, extrusion-based 3D printing requires not only that the structures are self-supporting, but also that extrusion toolpaths are continuous and free of self-overlap. The structure proposed in this paper, called CrossFill, complies with these requirements. In particular, CrossFill is a self-supporting foam structure, for which each layer is fabricated by a single, continuous and overlap-free path of material extrusion. Our method for generating CrossFill is based on a space-filling surface that employs spatially varying subdivision levels. Dithering of the subdivision levels is performed to accurately reproduce a prescribed density distribution. We demonstrate the effectiveness of CrossFill on a number of experimental tests and applications.},
author = {Kuipers, Tim and Wu, Jun and Wang, Charlie C L},
doi = {10.1016/j.cad.2019.05.003},
file = {:home/t.kuipers/Documents/PhD/Fractal Dithering project/paper/FINAL{\_}postprint.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {Continuous material extrusion,Functionally graded material,Fused deposition modeling,Graded density,Space-filling surface},
pages = {37--50},
publisher = {Elsevier},
title = {{CrossFill: Foam Structures with Graded Density for Continuous Material Extrusion}},
COMMENTEDurl = {http://www.sciencedirect.com/science/article/pii/S0010448519301800 https://doi.org/10.1016/j.cad.2019.05.003},
volume = {114},
year = {2019}
}
@article{kumar2009fractal,
abstract = {The present work describes an approach for layered manufacturing (LM) of porous objects using an appropriate modelling scheme, a pre-processing algorithm for slicing and a raster tool path generation based on the porosity information. Initially an overall framework of modelling and data transfer that includes controlled porosity information apart from the external geometry of porous objects and its transfer for LM is presented. A novel raster path generation methodology using space-filling fractal curves for LM of porous models is presented later. Specifically, the geometry and space-filling character-istics of fractal curves are studied for application to raster tool path generation in LM. Finally, boundary-constrained raster patterns are generated based on the surface geometry. The resulting data can be translated into a machine language file that can be imported by an LM system. Case studies are presented to illustrate the efficacy of this approach.},
author = {Kumar, Gurunathan Saravana and Pandithevan, Ponnusamy and Ambatti, Appa Rao},
doi = {10.1080/17452750802688215},
file = {:home/t.kuipers/Downloads/reprint{\_}vpp09{\_}frtp.pdf:pdf},
COMMENTEDissn = {17452759},
journal = {Virtual and Physical Prototyping},
keywords = {Fractal curves,Layered manufacturing,Porous objects,Raster tool paths,fractal curves,layered manufacturing,porous objects,raster tool paths},
month = {jun},
number = {2},
pages = {91--104},
publisher = {Taylor {\&} Francis Group},
title = {{Fractal raster tool paths for layered manufacturing of porous objects}},
COMMENTEDurl = {http://www.tandfonline.com/doi/abs/10.1080/17452750802688215},
volume = {4},
year = {2009}
}
@article{ISI:000379254200014,
author = {Kunin, Valentin and Yang, Shu and Cho, Yigil and Deymier, Pierre and Srolovitz, David J},
doi = {10.1016/j.eml.2015.12.003},
COMMENTEDissn = {2352-4316},
journal = {EXTREME MECHANICS LETTERS},
month = {mar},
pages = {103--114},
title = {{Static and dynamic elastic properties of fractal-cut materials}},
volume = {6},
year = {2016}
}
@article{ISI:000398114200009,
author = {Langelaar, Matthijs},
doi = {10.1007/s00158-016-1522-2},
COMMENTEDissn = {1615-147X},
journal = {STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION},
month = {mar},
number = {3},
pages = {871--883},
title = {{An additive manufacturing filter for topology optimization of print-ready designs}},
volume = {55},
year = {2017}
}
@article{Langelaar2016a,
abstract = {The potential of topology optimization to amplify the benefits of additive manufacturing (AM), by fully exploiting the vast design space that AM allows, is widely recognized. However, existing topology optimization approaches do not consider AM-specific limitations during the design process, resulting in designs that are not self-supporting. This leads to additional effort and costs in post-processing and use of sacrificial support structures. To overcome this difficulty, this paper presents a topology optimization formulation that includes a simplified AM fabrication model implemented as a layerwise filtering procedure. Unprintable geometries are effectively excluded from the design space, resulting in fully self-supporting optimized designs. The procedure is demonstrated on numerical examples involving compliance minimization, eigenfrequency maximization and compliant mechanism design. Despite the applied restrictions, in suitable orientations fully printable AM-restrained designs matched the performance of reference designs obtained by conventional topology optimization.},
author = {Langelaar, Matthijs},
doi = {10.1016/j.addma.2016.06.010},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860418301519-main.pdf:pdf;:home/t.kuipers/Downloads/topo.pdf:pdf},
isbn = {2214-8604},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {,Additive manufacturing,Manufacturing restrictions,Overhang angle,Self-supporting designs,Topology optimization},
number = {April},
pages = {60--70},
publisher = {Elsevier},
title = {{Topology optimization of 3D self-supporting structures for additive manufacturing}},
COMMENTEDurl = {https://doi.org/10.1016/j.addma.2018.04.016 http://dx.doi.org/10.1016/j.addma.2016.06.010},
volume = {12},
year = {2016}
}
@article{langlois2018,
author = {Langlois, Timothy and Shamir, Ariel and Dror, Daniel and Matusik, Wojciech and Levin, David I. W.},
doi = {10.1145/2980179.2982436},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Langlois et al. - 2016 - Stochastic structural analysis for context-aware design and fabrication.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {FEM,computational design,structural analysis},
month = {nov},
number = {6},
pages = {1--13},
publisher = {ACM},
title = {{Stochastic structural analysis for context-aware design and fabrication}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2980179.2982436},
volume = {35},
year = {2016}
}
@inproceedings{ISI:000388377100941,
abstract = {In this paper we present a novel design tool for the generation of graded dielectric structures via additive manufacturing. Space filling curves are utilized to create tool paths ideal for the additive manufacturing (AM) processes. Fused deposition modeling (FDM) was utilized to print spatially varying structures resulting in a spatially varying relative permittivity. A wide range of varying fill fractions were printed and evaluated; the simulated and measured results displayed good agreement. To verify that the design tool can be applied to practical structures a gradient index flat lens was designed, printed, and tested. {\textcopyright} 2016 IEEE.},
annote = {IEEE-Antennas-and-Propagation-Society International Symposium, Fajardo,
PR, JUN 26-JUL 01, 2016},
author = {Larimore, Zachary J. and Mirotznik, Mark S. and Parsons, Paul E.},
booktitle = {2016 IEEE Antennas and Propagation Society International Symposium, APSURSI 2016 - Proceedings},
doi = {10.1109/APS.2016.7696675},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Larimore, Mirotznik, Parsons - 2016 - Space Filling Curves for Additive Manufacturing of Spatially Graded Dielectric Structures.pdf:pdf},
isbn = {9781509028863},
COMMENTEDissn = {1522-3965},
keywords = {3D Printing,Additive Manufacturing,Graded Dielectrics},
pages = {1937--1938},
series = {IEEE Antennas and Propagation Society International Symposium},
title = {{Space filling curves for additive manufacturing of spatially graded dielectric structures}},
year = {2016}
}
@article{lavin2004claude,
author = {Lavin, Irving},
title = {{Claude Mellan's Holy Face}},
year = {2004}
}
@article{ISI:000275544100008,
author = {Le, Chau and Norato, Julian and Bruns, Tyler and Ha, Christopher and Tortorelli, Daniel},
doi = {10.1007/s00158-009-0440-y},
COMMENTEDissn = {1615-147X},
journal = {STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION},
month = {apr},
number = {4},
pages = {605--620},
title = {{Stress-based topology optimization for continua}},
volume = {41},
year = {2010}
}
@incollection{Leary2013,
abstract = {Support material is often utilised in asdditive manufacture to enable geometries that are not otherwise self-supporting. Despite the associated opportunities for innovation, the use of support material also introduces a series of limitations: additional material cost, cost of removal of support material, potential contamination of biocompatible materials, and entrapment of support material within cellular structures. This work presents a strategy for minimising the use of support material by comparing the geometric limits of an additive manufacture process to the build angles that exist within a proposed geometry. This method generates a feasibility map of the feasible build orientations for a proposed geometry with a given process. The method is applied to polyhedra that are suitable for close packing to identify space-filling tessellated structures that can be selfsupporting. The integrity of an FDM process is quantified, and using the associated feasibility map, self-supporting polyhedra are manufactured. These polyhedra are integrated with non-trivial geometries to achieve a reduction in consumed material of approximately 50{\%}. {\textcopyright} (2013) Trans Tech Publications, Switzerland.},
author = {Leary, Martin and Babaee, Mohammad and Brandt, Milan and Subic, Aleksandar},
booktitle = {Advanced Materials Research},
doi = {10.4028/www.scientific.net/AMR.633.148},
editor = {{Subic, A}},
file = {:home/t.kuipers/Downloads/AMR.633.148.pdf:pdf;:home/t.kuipers/Downloads/AMR.633.148(1).pdf:pdf},
isbn = {3037855851},
COMMENTEDissn = {1662-8985},
keywords = {,abstract,additive manufacture,are,close packing,deposition modelling,despite the associated opportunities,digital manufacture,for innovation,fused,not otherwise self-supporting,optimisation,rapid prototyping,self-tessellating structures,support material is often,the use of,to enable geometries that,utilised in additive manufacture},
pages = {148--168},
series = {Advanced Materials Research},
title = {{Feasible Build Orientations for Self-Supporting Fused Deposition Manufacture: A Novel Approach to Space-Filling Tesselated Geometries}},
COMMENTEDurl = {http://www.scientific.net/AMR.633.148},
volume = {633},
year = {2013}
}
@article{lee1982medial,
abstract = {The medial axis transformation is a means first proposed by Blum to describe a shape. In this paper we present a 0(n log n) algorithm for computing the medial axis of a planar shape represented by an n-edge simple polygon. The algorithm is an improvement over most previously known results interms of both efficiency and exactness and has been implemented in Fortran. Some computer-plotted output of the program are also shown in the paper.},
annote = {From Duplicate 2 (Medial axis transformation of a planar shape - Lee, Der-Tsai T)

From Duplicate 1 (Medial axis transformation of a planar shape - Lee, Der-Tsai T)

From Duplicate 1 (Medial Axis Transformation of - Lee, D T)

n log n algorithm

From Duplicate 2 (Medial axis transformation of a planar shape - Lee, Der-Tsai T)

From Duplicate 2 (Medial Axis Transformation of - Lee, D T)

n log n algorithm},
author = {Lee, Der-Tsai T.},
doi = {10.1109/TPAMI.1982.4767267},
file = {:home/t.kuipers/Downloads/Medial{\_}Axis{\_}Transformation{\_}of{\_}a{\_}Planar{\_}Shape.pdf:pdf;:home/t.kuipers/Downloads/04767267.pdf:pdf},
COMMENTEDissn = {01628828},
journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
keywords = {Analysis of algorithm,Voronoi diagram,computational complexity,continuous skeleton,divide-and-conquer,medical axis transformation,simple polygon},
number = {4},
pages = {363--369},
publisher = {IEEE},
title = {{Medial Axis Transformation of a Planar Shape}},
volume = {PAMI-4},
year = {1982}
}
@article{Lee,
author = {Lee, In-kwon and Kim, Myung-soo and Elber, Gershon},
file = {:home/t.kuipers/Downloads/Planar{\_}curve{\_}offset{\_}based{\_}on{\_}circle{\_}appr.pdf:pdf},
keywords = {b,convolution,curve approximation,hodograph,nc machining,offset},
number = {8},
pages = {617--630},
title = {{Based on Circle Approximation}},
volume = {28}
}
@article{lee1996planar,
author = {Lee, In-Kwon and Kim, Myung-Soo and Elber, Gershon},
file = {:home/t.kuipers/Downloads/Planar{\_}curve{\_}offset{\_}based{\_}on{\_}circle{\_}appr.pdf:pdf},
journal = {Computer-Aided Design},
keywords = {,b,convolution,curve approximation,hodograph,nc machining,offset},
number = {8},
pages = {617--630},
title = {{Planar curve offset based on circle approximation}},
volume = {28},
year = {1996}
}
@article{Lefebvre,
author = {Lefebvre, S and (AEFA'13), LIN Grand-Est - Forum on Additive Manufacturing and undefined 2013},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Lefebvre, (AEFA'13), 2013 - Unknown - IceSL A GPU accelerated CSG modeler and slicer.pdf:pdf},
journal = {Citeseer},
title = {{IceSL: A GPU accelerated CSG modeler and slicer}},
COMMENTEDurl = {http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.680.4008{\&}rep=rep1{\&}type=pdf}
}
@inproceedings{ISI:000337900800086,
annote = {6th International Conference on Advanced Research in Virtual and
Physical Prototyping (VRatP), Leiria, PORTUGAL, OCT 01-05, 2013},
author = {Lei, Ningrong and Moon, Seung Ki and Bi, Guijun},
booktitle = {HIGH VALUE MANUFACTURING: ADVANCED RESEARCH IN VIRTUAL AND RAPID PROTOTYPING},
editor = {{Bartolo, PJD and DeLemos, ACS and Pereira, AMH and Mateus, AJD and Ramos, C and DosSantos, C and Oliveira, D and Pinto, E and Craveiro, F and Bartolo, HMCDTG and Almeia, HD and Sousa, I and Matias, JM and Durao, L and Gaspar, M and Alves, NMF and Carreira}},
isbn = {978-1-315-81741-5},
pages = {505--510},
title = {{Additive manufacturing and topology optimization to support product family design}},
year = {2014}
}
@article{Leung2019,
author = {Leung, Yuen-Shan and Kwok, Tsz-Ho and Mao, Huachao and Chen, Yong},
doi = {10.1016/j.cad.2019.05.031},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448519302155-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
publisher = {Elsevier},
title = {{Digital Material Design Using Tensor-Based Error Diffusion for Additive Manufacturing}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S0010448519302155},
year = {2019}
}
@article{Li2019,
author = {Li, Dawei and Dai, Ning and Tang, Yunlong and Dong, Guoying and Zhao, Yaoyao Fiona},
doi = {10.1115/1.4042617},
file = {:home/t.kuipers/Downloads/md{\_}141{\_}7{\_}071402.pdf:pdf},
keywords = {computational design,functionally graded cellular structures,generative design,surface,triply periodic level},
number = {July},
title = {{Design and Optimization of Graded Cellular Structures With Triply Periodic Level Surface-Based Topological Shapes}},
volume = {141},
year = {2019}
}
@article{Li2018,
abstract = {Lightweight cellular structure generation and topology optimization are common design methodologies in additive manufacturing. In this work, we present a novel optimization strategy for designing functionally graded cellular structures with desired mechanical properties. This approach is mainly by generating variable-density gyroid structure and then performing graded structure optimization. Firstly, the geometric properties of the original gyroid structures are analyzed, and the continuity and connectivity of the structures are optimized by adding a penalty function. Then, a homogenization method is used to obtain mechanical properties of gyroid-based cellular structures through a scaling law as a function of their relative densities. Secondly, the scaling law is added directly into the structure optimization algorithm to compute the optimal density distribution in part being optimized. Thirdly, the density mapping and interpolation approach are used to map the output of structure optimization into the parametric gyroid structure which results in an optimum lightweight lattice structure with uniformly varying densities across the design space. Lastly, the effectiveness and robustness of the optimized results are analyzed through finite element analysis and experiments.},
author = {Li, Dawei and Liao, Wenhe and Dai, Ning and Dong, Guoying and Tang, Yunlong and Xie, Yi Min},
doi = {10.1016/j.cad.2018.06.003},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448518300381-main.pdf:pdf;:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Li et al. - 2018 - Optimal design and modeling of gyroid-based functionally graded cellular structures for additive manufacturing.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {,Cellular structure,Functionally Graded materials,Gyroid structure,Structure optimization},
month = {jul},
pages = {87--99},
publisher = {Elsevier},
title = {{Optimal design and modeling of gyroid-based functionally graded cellular structures for additive manufacturing}},
COMMENTEDurl = {https://doi.org/10.1016/j.cad.2018.06.003 https://www.sciencedirect.com/science/article/pii/S0010448518300381},
volume = {104},
year = {2018}
}
@article{Lieneke2016,
abstract = {Additive manufacturing creates parts in layers without using formative tools. Compared to established manufacturing processes, additive manufacturing offers many advantages. However, only a few research institutions and technology-leading companies use additive manufacturing for end-use part production because relevant challenges have not been sufficiently researched yet. Missing restrictions become apparent in the available geometrical accuracy. The objective of this investigation was the experimental determination of dimensional tolerances using standard parameters. To this end, a methodical procedure was set up. Based on experimentally determined deviations, dimensional tolerances were derived.},
author = {Lieneke, Tobias and Denzer, Vera and Adam, Guido A.O. and Zimmer, Detmar},
doi = {10.1016/j.procir.2016.02.361},
file = {:home/t.kuipers/Downloads/1-s2.0-S2212827116007447-main.pdf:pdf},
isbn = {4952516032},
COMMENTEDissn = {22128271},
journal = {Procedia CIRP},
keywords = {Additive manufacturing,Fused Deposition Modeling,dimensional tolerances,geometrical accuracy,geometrical deviations,methodical procedure},
pages = {286--291},
publisher = {Elsevier B.V.},
title = {{Dimensional Tolerances for Additive Manufacturing: Experimental Investigation for Fused Deposition Modeling}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.procir.2016.02.361},
volume = {43},
year = {2016}
}
@article{limmahakhun2017stiffness,
abstract = {The use of cobalt chromium (CoCr) in orthopaedic joint replacement shields the peri-implant bone stress, contributing to a premature loosening of the implants. In order to reduce the need for revision surgeries, light weight implants with tailored functionalities need to be developed. In this study, the compressive mechanical properties of laser-melted CoCr cellular structures with a pillar octahedral architecture [0° ± 45°] were investigated. Four types of graded cellular structures, based on grading orientations along radial and longitudinal planes, were manufactured using selective laser melting techniques. The cellular structures in this study have the mechanical properties (E = 2.3–3.1 GPa, $\sigma$ = 113–523 MPa) compatible with bone structures. Grading a porosity of the CoCr cellular structures provides a greater stress transfer to the proximal peri-implant area. The axially graded cellular structures demonstrated significant reduction of the peri-implant stress shielding. Incorporation of CoCr graded cellular structures into a structure like femoral stems is expected to have the potential to reduce the revision surgeries.},
author = {Limmahakhun, Sakkadech and Oloyede, Adekunle and Sitthiseripratip, Kriskrai and Xiao, Yin and Yan, Cheng},
doi = {10.1016/j.matdes.2016.11.090},
file = {:home/t.kuipers/Downloads/1-s2.0-S0264127516314915-main.pdf:pdf},
COMMENTEDissn = {18734197},
journal = {Materials and Design},
keywords = {Cobalt chromium,Functionally graded cellular structures,Mechanical properties,Selective laser melting,Stress shielding},
pages = {633--641},
publisher = {Elsevier B.V.},
title = {{Stiffness and strength tailoring of cobalt chromium graded cellular structures for stress-shielding reduction}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.matdes.2016.11.090},
volume = {114},
year = {2017}
}
@article{ISI:000342225700009,
author = {Lin, Erica and Li, Yaning and Weaver, James C and Ortiz, Christine and Boyce, Mary C},
doi = {10.1557/jmr.2014.175},
file = {:home/t.kuipers/Downloads/tunability-and-enhancement-of-mechanical-behavior-with-additively-manufactured-bio-inspired-hierarchical-suture-interfaces.pdf:pdf},
COMMENTEDissn = {0884-2914},
journal = {JOURNAL OF MATERIALS RESEARCH},
month = {sep},
number = {17, SI},
pages = {1867--1875},
title = {{Tunability and enhancement of mechanical behavior with additively manufactured bio-inspired hierarchical suture interfaces}},
volume = {29},
year = {2014}
}
@article{Liu2019a,
abstract = {As foams having hierarchical mechanical properties, functionally graded porous materials (FGPMs) can satisfy multifold functional constraints whilst minimizing weight. In this paper, a novel method is proposed for goal-driven design and fabrication of open-cell FGPMs with tailored elasticity distributions. To achieve the continuity in both structural geometry and mechanical properties, irregularly smooth porous structures, which have naturally realistic appearance, are designed by combining 3D Voronoi diagrams and skeleton-based implicit surfaces. A procedural modeling method integrating additive manufacturing (AM) is developed for avoiding the FGPM full representations which consume tremendous computational memory. For easily mapping the graded porous structures to yield tailored elasticity distributions, a mapping model from the elasticity distribution to the density field is formulated. The method is experimentally and numerically validated. Additionally, the compression tests showed the superior mechanical performance compared to straight-beam-based foams, and the stiffness and strength of the foam are found to be improved as a result of FGPMs. This research opens up a new route of tailoring the novel foams.},
annote = {doesn't consider overhang},
author = {Liu, Bin and Chen, Huihui and Cao, Wei},
doi = {10.1016/j.ijmecsci.2019.05.002},
file = {:home/t.kuipers/Downloads/1-s2.0-S0020740318322446-main.pdf:pdf},
COMMENTEDissn = {00207403},
journal = {International Journal of Mechanical Sciences},
keywords = {Additive manufacturing,Functionally graded materials,Integrated design,Porous structures,Tailored elasticity},
number = {May},
pages = {457--470},
publisher = {Elsevier},
title = {{A novel method for tailoring elasticity distributions of functionally graded porous materials}},
volume = {157-158},
year = {2019}
}
@article{Liu2017,
abstract = {{\textcopyright} 2017 by ASME. In the present work, a new approach for designing graded lattice structures is developed under the moving morphable components/voids (MMC/MMV) topology optimization framework. The essential idea is to make a coordinate perturbation to the topology description functions (TDF) that are employed for the description of component/void geometries in the design domain. Then, the optimal graded structure design can be obtained by optimizing the coefficients in the perturbed basis functions. Our numerical examples show that the proposed approach enables a concurrent optimization of both the primitive cell and the graded material distribution in a straightforward and computationally effective way. Moreover, the proposed approach also shows its potential in finding the optimal configuration of complex graded lattice structures with a very small number of design variables employed under various loading conditions and coordinate systems.},
author = {Liu, Chang and Du, Zongliang and Zhang, Weisheng and Zhu, Yichao and Guo, Xu},
doi = {10.1115/1.4036941},
file = {:home/t.kuipers/Downloads/liu2017.pdf:pdf},
COMMENTEDissn = {0021-8936},
journal = {Journal of Applied Mechanics},
keywords = {additive manufacture,graded lattice structure,mmc,mmv,morphable components,moving,topology optimization,voids},
number = {8},
pages = {081008},
title = {{Additive Manufacturing-Oriented Design of Graded Lattice Structures Through Explicit Topology Optimization}},
volume = {84},
year = {2017}
}
@article{ISI:000408076400003,
author = {Liu, Jikai and To, Albert C},
doi = {10.1016/j.cad.2017.05.003},
COMMENTEDissn = {0010-4485},
journal = {COMPUTER-AIDED DESIGN},
month = {oct},
pages = {27--45},
title = {{Deposition path planning-integrated structural topology optimization for 3D additive manufacturing subject to self-support constraint}},
volume = {91},
year = {2017}
}
@article{Liu2019,
abstract = {PurposeThe purpose of this paper is to explore the possibility of combining additive manufacturing (AM) with topology optimization to generate support structures for addressing the challenging overhang problem. The overhang problem is considered as a constraint, and a novel algorithm based on continuum topology optimization is proposed. Design/methodology/approachA mathematical model is formulated, and the overhang constraint is embedded implicitly through a Heaviside function projection. The algorithm is based on the Solid Isotropic Material Penalization (SIMP) method, and the optimization problem is solved through sensitivity analysis. FindingsThe overhang problem of the support structures is fixed. The optimal topology of the support structures is developed from a mechanical perspective and remains stable as the material volume of support structures changes, which allows engineers to adjust the material volume to save cost and printing time and meanwhile ensure sufficient stiffness of the support struc...},
author = {Liu, Yang and Li, Zuyu and Wei, Peng and Chen, Shikui},
doi = {10.1108/RPJ-10-2017-0213},
file = {:home/t.kuipers/Downloads/liu2018.pdf:pdf},
COMMENTEDissn = {13552546},
journal = {Rapid Prototyping Journal},
keywords = {Additive manufacturing,Overhang features,Support structures,Topology optimization},
number = {2},
pages = {232--246},
title = {{Generating support structures for additive manufacturing with continuum topology optimization methods}},
volume = {25},
year = {2019}
}
@article{Livesu2017CGF,
abstract = {Abstract Due to the wide diffusion of 3D printing technologies, geometric algorithms for Additive Manufacturing are being invented at an impressive speed. Each single step along the processing pipeline that prepares the 3D model for fabrication can now count on dozens of methods, that analyse and optimize geometry and machine instructions for various objectives. This report provides a classification of this huge state of the art, and elicits the relation between each single algorithm and a list of desirable objectives during model preparation – a process globally refereed to as Process Planning. The objectives themselves are listed and discussed, along with possible needs for tradeoffs. Additive Manufacturing technologies are broadly categorized to explicitly relate classes of devices and supported features. Finally, this report offers an analysis of the state of the art while discussing open and challenging problems from both an academic and an industrial perspective.},
archivePrefix = {arXiv},
arxivId = {1705.03811},
author = {Livesu, Marco and Ellero, Stefano and Mart{\'{i}}nez, Jon{\`{a}}s and Lefebvre, Sylvain and Attene, Marco},
doi = {10.1111/cgf.13147},
COMMENTEDeprint = {1705.03811},
file = {:home/t.kuipers/Downloads/v36i2pp537-564.pdf:pdf;:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Livesu et al. - 2017 - From 3D models to 3D prints an overview of the processing pipeline.pdf:pdf;:home/t.kuipers/Downloads/cgf.13147.pdf:pdf},
institution = {Wiley Online Library},
COMMENTEDissn = {14678659},
journal = {Computer Graphics Forum},
keywords = {Categories and Subject Descriptors (according to A,I.3.5 Computer Graphics: Computational Geometry a,I.3.5 [Computer Graphics]: Computational Geometry,J.6 Computer-Aided Engineering: Computer-aided ma,J.6 [Computer-Aided Engineering]: Computer-aided m,J.6 [Computer‐Aided Engineering]: Computer‐aided m,and systems,languages},
month = {may},
number = {2},
pages = {537--564},
publisher = {Wiley/Blackwell (10.1111)},
title = {{From 3D models to 3D prints: an overview of the processing pipeline}},
COMMENTEDurl = {https://onlinelibrary.wiley.com/doi/abs/10.1111/cgf.13147 http://doi.wiley.com/10.1111/cgf.13147},
volume = {36},
year = {2017}
}
@incollection{ISI:000336003900139,
author = {Lohtander, Mika and Valkeapaa, Simo and Varis, Juha},
booktitle = {ADVANCED DESIGN AND MANUFACTURE V},
doi = {10.4028/www.scientific.net/KEM.572.605},
editor = {{Su, D and Zhu, S}},
COMMENTEDissn = {1013-9826},
pages = {605--608},
series = {Key Engineering Materials},
title = {{The Capability of the Laser Based Additive Manufacturing Process in the Manufacture of Fractal Like Heat Transfer Devices}},
volume = {572},
year = {2014}
}
@incollection{Lou1998,
annote = {issues: going 3D, symmetry
take into account constraints of printer, in this case SLA. (support material removal, voxels have to be connected)},
author = {Lou, Qun and Stucki, Peter},
booktitle = {Electronic Publishing, Artistic Imaging, and Digital Typography},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Lou, Stucki - 1998 - Fundamentals of 3D Halftoning.pdf:pdf},
keywords = {2d and 3d halftoning,3d filtering,3d fractals,3d ordered dithering and,addi-,binary volume elements or,error-diffusion,porous media,spheres,stereolithography,super-,tive fabrication techniques,vels},
pages = {224--239},
publisher = {Springer Berlin Heidelberg},
title = {{Fundamentals of 3D Halftoning}},
year = {1998}
}
@article{lu2018,
author = {Lu, Lin and Chen, Baoquan and Sharf, Andrei and Zhao, Haisen and Wei, Yuan and Fan, Qingnan and Chen, Xuelin and Savoye, Yann and Tu, Changhe and Cohen-Or, Daniel},
doi = {10.1145/2601097.2601168},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Lu et al. - 2014 - Build-to-last.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing technologies,porous structure design,solid object hollowing,volume-voronoi shape},
month = {jul},
number = {4},
pages = {1--10},
publisher = {ACM},
title = {{Build-to-Last: Strength to Weight 3D Printed Objects}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2601097.2601168},
volume = {33},
year = {2014}
}
@article{Luu2019,
abstract = {In the competition for the volumetric representation most suitable for functionally graded materials in additively manufactured (AM) objects, volumetric subdivision schemes, such as Catmull–Clark (CC) solids, are widely neglected. Although they show appealing properties, efficient implementations of some fundamental algorithms are still missing. In this paper, we present a fast algorithm for direct slicing of CC-solids generating bitmaps printable by multi-material AM machines. Our method optimizes runtime by exploiting constant time limit evaluation and other structural characteristics of CC-solids. We compare our algorithm with the state of the art in trivariate trimmed spline representations and show that our algorithm has similar runtime behavior as slicing trivariate splines, fully supporting the benefits of CC-solids.},
author = {Luu, Thu Huong and Altenhofen, Christian and Ewald, Tobias and Stork, Andr{\'{e}} and Fellner, Dieter},
doi = {10.1016/j.cag.2019.05.023},
file = {:home/t.kuipers/Downloads/1-s2.0-S0097849319300846-main.pdf:pdf},
COMMENTEDissn = {00978493},
journal = {Computers and Graphics (Pergamon)},
keywords = {Additive manufacturing,Catmull–Clark solids,Functionally graded materials,Slicing,Subdivision volumes},
pages = {295--303},
publisher = {Elsevier},
title = {{Efficient slicing of Catmull–Clark solids for 3D printed objects with functionally graded material}},
COMMENTEDurl = {https://doi.org/10.1016/j.cag.2019.05.023},
volume = {82},
year = {2019}
}
@article{Mahmoud2017,
abstract = {A major advantage of additive manufacturing (AM) technologies is the ability to print customized products, which makes these technologies well suited for the orthopedic implants industry. Another advantage is the design freedom provided by AM technologies to enhance the performance of orthopedic implants. This paper presents a state-of-the-art overview of the use of AM technologies to produce orthopedic implants from lattice structures and functionally graded materials. It discusses how both techniques can improve the implants' performance significantly, from a mechanical and biological point of view. The characterization of lattice structures and the most recent finite element analysis models are explored. Additionally, recent case studies that use functionally graded materials in biomedical implants are surveyed. Finally, this paper reviews the challenges faced by these two applications and suggests future research directions required to improve their use in orthopedic implants.},
author = {Mahmoud, Dalia and Elbestawi, Mohamed},
doi = {10.3390/jmmp1020013},
file = {:home/t.kuipers/Downloads/jmmp-01-00013.pdf:pdf},
isbn = {2504-4494},
COMMENTEDissn = {2504-4494},
journal = {Journal of Manufacturing and Materials Processing},
keywords = {additive manufacturing,finite element modelling,functionally graded material,lattice structures,orthopedic implants},
number = {2},
pages = {13},
title = {{Lattice Structures and Functionally Graded Materials Applications in Additive Manufacturing of Orthopedic Implants: A Review}},
COMMENTEDurl = {http://www.mdpi.com/2504-4494/1/2/13},
volume = {1},
year = {2017}
}
@article{Mao2019,
abstract = {Adaptive slicing is an important computational task required in the layer-based manufacturing process. Its purpose is to find an optimal trade-off between the fabrication time (number of layers) and the surface quality (geometric deviation error). Most of the traditional adaptive slicing algorithms are computationally expensive or only based on local evaluation of errors. To tackle these problems, we introduce a method to efficiently generate slicing plans by a new metric profile that can characterize the distribution of deviation errors along the building direction. By generalizing the conventional error metrics, the proposed metric profile is a density function of deviation errors, which measures the global deviation errors rather than the in-plane local geometry errors used in most prior methods. Slicing can be efficiently evaluated based on metric profiles in contrast to the expensive computation on models in boundary-representation. An efficient algorithm based on dynamic programming is proposed to find the best slicing plan. Our adaptive slicing method can also be applied to models with weighted features and can serve as the inner loop to search the best building direction. The performance of our approach is demonstrated by experimental tests on different examples.},
author = {Mao, Huachao and Kwok, Tsz Ho and Chen, Yong and Wang, Charlie C.L.},
doi = {10.1016/j.cad.2018.09.006},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448518301763-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {Adaptive slicing,Additive manufacturing,Geometric profile,Sampling},
pages = {89--101},
publisher = {Elsevier},
title = {{Adaptive slicing based on efficient profile analysis}},
COMMENTEDurl = {https://doi.org/10.1016/j.cad.2018.09.006},
volume = {107},
year = {2019}
}
@article{Marinov2019,
author = {Marinov, Martin and Amagliani, Marco and Barback, Tristan and Flower, Jean and Barley, Stephen and Furuta, Suguru and Charrot, Peter and Henley, Iain and Santhanam, Nanda and Finnigan, G. Thomas and Meshkat, Siavash and Hallet, Justin and Sapun, Maciej and Wolski, Pawel},
doi = {10.1016/j.cad.2019.05.016},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448519301873-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
pages = {194--205},
publisher = {Elsevier},
title = {{Generative design conversion to editable and watertight boundary representation}},
COMMENTEDurl = {https://doi.org/10.1016/j.cad.2019.05.016},
volume = {115},
year = {2019}
}
@article{Martinez2016,
abstract = {Figure 1: Our method procedurally generates structures with graded material elasticities, which can be directly fabricated. Here the user paints elasticity on a 3D model to create a flexible figurine. Model: Moomin (thing:1173447) by Jeroentjj. Abstract Microstructures at the scale of tens of microns change the physical properties of objects, making them lighter or more flexible. While traditionally difficult to produce, additive manufacturing now lets us physically realize such microstruc-tures at low cost. In this paper we propose to study procedural, aperiodic microstructures inspired by Voronoi open-cell foams. The absence of regularity affords for a simple approach to grade the foam geometry — and thus its mechanical properties — within a target object and its surface. Rather than requiring a global optimization process, the microstructures are di-rectly generated to exhibit a specified elastic behavior. The implicit evaluation is akin to procedural textures in com-puter graphics, and locally adapts to follow the elasticity field. This allows very detailed structures to be generated in large objects without having to explicitly produce a full representation — mesh or voxels — of the complete object: the structures are added on the fly, just before each object slice is manufactured. We study the elastic behavior of the microstructures and pro-vide a complete description of the procedure generating them. We explain how to determine the geometric parameters of the microstructures from a target elasticity, and evaluate the result on printed samples. Finally, we apply our approach to the fabrication of objects with spatially varying elasticity, in-cluding the implicit modeling of a frame following the object surface and seamlessly connecting to the microstructures.},
author = {Mart{\'{i}}nez, Jon{\`{a}}s and Dumas, J{\'{e}}r{\'{e}}mie and Lefebvre, Sylvain},
doi = {10.1145/2897824.2925922},
file = {:home/t.kuipers/Downloads/MDL16.pdf:pdf},
isbn = {9781450342797},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3d printing,additive manufacturing,computing methodologies,concepts,material design,procedu-,ral modeling,shape mod-},
number = {4},
pages = {1--12},
title = {{Procedural voronoi foams for additive manufacturing}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2897824.2925922},
volume = {35},
year = {2016}
}
@article{Martinez2015,
author = {Mart{\'{i}}nez, Jon{\`{a}}s and Dumas, J{\'{e}}r{\'{e}}mie and Lefebvre, Sylvain and Wei, Li-Yi},
doi = {10.1145/2816795.2818101},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Mart{\'{i}}nez et al. - 2015 - Structure and appearance optimization for controllable shape design.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {manufacturing,modeling,texture synthesis,topology optimization},
month = {oct},
number = {6},
pages = {1--11},
publisher = {ACM},
title = {{Structure and appearance optimization for controllable shape design}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2816795.2818101},
volume = {34},
year = {2015}
}
@article{Hornus2018,
author = {Mart{\'{i}}nez, Jon{\`{a}}s and Hornus, Samuel and Song, Haichuan and Lefebvre, Sylvain},
doi = {10.1145/3197517.3201343},
file = {:home/t.kuipers/Downloads/polyvoro.pdf:pdf},
journal = {ACM Transactions on Graphics},
keywords = {,3D printing,Microstructure,Polyhedral distance,Shape modeling,Voronoi diagram,additive manufacturing,fused deposition modeling},
month = {aug},
number = {4},
pages = {15},
publisher = {Association for Computing Machinery},
series = {Proceedings of SIGGRAPH 2018},
title = {{Polyhedral Voronoi diagrams for additive manufacturing}},
COMMENTEDurl = {https://hal.inria.fr/hal-01697103},
volume = {37},
year = {2018}
}
@article{Martinez2017,
author = {Mart{\'{i}}nez, Jon{\`{a}}s and Song, Haichuan and Dumas, J{\'{e}}r{\'{e}}mie and Lefebvre, Sylvain},
doi = {10.1145/3072959.3073638},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Mart{\'{i}}nez et al. - 2017 - Orthotropic iki -nearest foams for additive manufacturing.pdf:pdf;:home/t.kuipers/Downloads/MSDL17.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,additive manufacturing,material design,metamaterials,procedural modeling},
month = {jul},
number = {4},
pages = {1--12},
publisher = {ACM},
title = {{Orthotropic k-nearest foams for additive manufacturing}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=3072959.3073638},
volume = {36},
year = {2017}
}
@article{Maskery2018,
author = {Maskery, I and Sturm, L and Aremu, A O and Panesar, A and Williams, C B and Tuck, C J and Wildman, R D and Ashcroft, I A and Hague, R J M},
doi = {10.1016/j.polymer.2017.11.049},
file = {:home/t.kuipers/Downloads/Insights{\_}into{\_}the{\_}mechanical{\_}properties{\_}of{\_}several{\_}triply{\_}periodic{\_}minimal{\_}surface{\_}lattice{\_}structures{\_}made{\_}by{\_}polymer{\_}additive{\_}manufacturing.pdf:pdf},
COMMENTEDissn = {0032-3861},
journal = {Polymer},
keywords = {additive manufacturing,selective laser sintering},
pages = {62--71},
publisher = {Elsevier},
title = {{Insights into the mechanical properties of several triply periodic minimal surface lattice structures made by polymer additive manufacturing}},
COMMENTEDurl = {https://doi.org/10.1016/j.polymer.2017.11.049},
volume = {152},
year = {2018}
}
@article{Massarwi2019,
abstract = {3D objects, modeled using Computer Aided Geometric Design (CAGD) tools, are traditionally represented using a boundary representation (B-rep), and typically use spline functions to parameterize these boundary surfaces. However, recent development in physical analysis, in isogeometric analysis (IGA) in specific, necessitates a volumetric parametrization of the interior of the object. IGA is performed directly by integrating over the spline spaces of the volumetric spline representation of the object. Typically, tensor-product B-spline trivariates are used to parameterize the volumetric domain. A general 3D object, that can be modeled in contemporary B-rep CAD tools, is typically represented using trimmed B-spline surfaces. In order to capture the generality of the contemporary B-rep modeling space, while supporting IGA needs, Massarwi and Elber (2016) proposed the use of trimmed trivariates volumetric elements. However, the use of trimmed geometry makes the integration process more difficult since integration over trimmed B-spline basis functions is a highly challenging task Xu et al. (2017). In this work, we propose an algorithm that precisely decomposes a trimmed B-spline trivariate into a set of (singular only on the boundary) tensor-product B-spline trivariates, that can be utilized to simplify the integration process, in IGA. The trimmed B-spline trivariate is first subdivided into a set of trimmed B{\'{e}}zier trivariates, at all its internal knots. Then, each trimmed B{\'{e}}zier trivariate, is decomposed into a set of mutually exclusive tensor-product B-spline trivariates, that precisely cover the entire trimmed domain. This process, denoted untrimming, can be performed in either the Euclidean space or the parametric space of the trivariate. We present examples of the algorithm on complex trimmed trivariates' based geometry, and we demonstrate the effectiveness of the method by applying IGA over the (untrimmed) results.},
archivePrefix = {arXiv},
arxivId = {arXiv:1903.08907v1},
author = {Massarwi, Fady and Antolin, Pablo and Elber, Gershon},
doi = {10.1016/j.cagd.2019.04.005},
COMMENTEDeprint = {arXiv:1903.08907v1},
file = {:home/t.kuipers/Downloads/1903.08907.pdf:pdf},
COMMENTEDissn = {01678396},
journal = {Computer Aided Geometric Design},
keywords = {Heterogeneous materials,IGA,Isogeometric analysis,V-model,V-rep,Volumetric representations},
number = {1},
pages = {1--15},
title = {{Volumetric untrimming: Precise decomposition of trimmed trivariates into tensor products}},
volume = {71},
year = {2019}
}
@article{massarwi2018hierarchical,
abstract = {This paper proposes new methods and algorithms for the construction of micro-structures that leads to a high degree of precision and water-tight models. That proposed approach involves the tiling of the domain of a deformation map using copies of a tile. The resulting tiling is functionally composed into the deformation map to obtain freeform micro-structures. Such a decoupling of the micro and macro structures allows a simplified control over design parameters. Herein, we present several extensions to this micro-structure construction scheme, comprising bivariate and trivariate tiles, implicit and parametric, including with potential discontinuities. We present support for fractal-like micro-structures, with self-similarity, allow the encoding of volumetric properties and hence heterogeneity, support for shelling and capping boundary operations, random tiling and bifurcation tiling, and support for degree reduction of the result. We verify the robustness of our approach by subjecting some of our heterogeneous micro-structures to isogeometric analysis. Finally, a variety of results from an implementation of our algorithms are also presented.},
author = {Massarwi, Fady and Machchhar, Jinesh and Antolin, Pablo and Elber, Gershon},
doi = {10.1016/j.cad.2018.04.017},
file = {:home/t.kuipers/Downloads/MicroStructures.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {,Bifurcation tiling,Functional composition,Hierarchical tiling,Micro-structure,Random tiling},
pages = {148--159},
publisher = {Elsevier},
title = {{Hierarchical, random and bifurcation tiling with heterogeneity in micro-structures construction via functional composition}},
COMMENTEDurl = {https://doi.org/10.1016/j.cad.2018.04.017},
volume = {102},
year = {2018}
}
@inproceedings{Mcmains2000DETC,
author = {McMains, Sara and Smith, Jordan and Wang, Jianlin and Sequin, Carlo and Carlo, S},
booktitle = {ASME Design Engineering Technical Conference, Baltimore, Maryland},
file = {:home/t.kuipers/Downloads/10.1.1.2.1578.pdf:pdf},
organization = {Citeseer},
title = {{Layered manufacturing of thin-walled parts}},
year = {2000}
}
@article{ISI:000402937200003,
author = {McMillan, Matthew Leslie and Jurg, Marten and Leary, Martin and Brandt, Milan},
doi = {10.1108/RPJ-01-2016-0014},
COMMENTEDissn = {1355-2546},
journal = {RAPID PROTOTYPING JOURNAL},
number = {3},
pages = {486--494},
title = {{Programmatic generation of computationally efficient lattice structures for additive manufacture}},
volume = {23},
year = {2017}
}
@article{Mcor2013,
annote = {(accessed April, 2017)},
author = {Mcor},
title = {{How Paper-based 3D Printing Works: The Technology and Advantages}},
COMMENTEDurl = {http://mcortechnologies.com/wp-content/uploads/2013/04/MCOR-WP-19032013-EU{\_}low.pdf},
year = {2013}
}
@misc{mellan,
author = {Mellan, Claude},
publisher = {Rijksmuseum},
title = {{The Sudarium}},
COMMENTEDurl = {http://hdl.handle.net/10934/RM0001.collect.152641},
year = {1649}
}
@article{Methods2019,
author = {Methods, Comput and Mech, Appl and Wu, Zijun and Xia, Liang and Wang, Shuting and Shi, Tielin},
doi = {10.1016/j.cma.2018.11.003},
file = {:home/t.kuipers/Downloads/1-s2.0-S0045782518305589-main.pdf:pdf},
COMMENTEDissn = {0045-7825},
journal = {Computer Methods in Applied Mechanics and Engineering},
keywords = {arsp,lattice structures,multi-scale,substructuring,surrogate,topology optimization},
pages = {602--617},
publisher = {Elsevier B.V.},
title = {{Topology optimization of hierarchical lattice structures with substructuring}},
COMMENTEDurl = {https://doi.org/10.1016/j.cma.2018.11.003},
volume = {345},
year = {2019}
}
@article{Methods2019,
author = {Methods, Comput and Mech, Appl and Wu, Zijun and Xia, Liang and Wang, Shuting and Shi, Tielin},
doi = {10.1016/j.cma.2018.11.003},
file = {:home/t.kuipers/Downloads/1-s2.0-S0045782518305589-main.pdf:pdf},
COMMENTEDissn = {0045-7825},
journal = {Computer Methods in Applied Mechanics and Engineering},
keywords = {arsp,lattice structures,multi-scale,substructuring,surrogate,topology optimization},
pages = {602--617},
publisher = {Elsevier B.V.},
title = {{ScienceDirect Topology optimization of hierarchical lattice structures with substructuring}},
COMMENTEDurl = {https://doi.org/10.1016/j.cma.2018.11.003},
volume = {345},
year = {2019}
}
@article{Langelaar2016,
abstract = {In this paper, we formulate the generation of support structures for additive manufacturing as a topology optimization problem. Compared with usual geometric considerations based support structure design, this formulation affords mechanistic meaning to the computed support structures. Moreover, our study reveals that the topology optimization formulation generally leads to self-supporting designs without extraneous self-supporting constraints. We show the generality of the procedure by computing supports for a variety of parts in both two and three dimensions, including a complex model of the mascot of the University of Wisconsin-Madison. The resulting support structures have been 3D printed, demonstrating that the computed designs can successfully be used as supports},
author = {Mezzadri, Franceso Francesco and Bouriakov, Vladimir and Qian, Xiaoping},
doi = {10.1016/j.addma.2016.06.010},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860416301294-main.pdf:pdf;:home/t.kuipers/Downloads/topo1.pdf:pdf;:home/t.kuipers/Downloads/1-s2.0-S2214860416301294-main.pdf:pdf},
isbn = {2214-8604},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {,Additive manufacturing,Support structure,Topology optimization},
number = {March},
pages = {666--682},
publisher = {Elsevier},
title = {{Topology optimization of self-supporting support structures for additive manufacturing}},
COMMENTEDurl = {https://doi.org/10.1016/j.addma.2018.04.016},
volume = {21},
year = {2018}
}
@misc{monolith2018,
author = {{Michalatos, Panagiotis (Harvard Graduate School of Design)}, Andrew O. Payne (Autodesk)},
title = {{Autodesk Monolith}},
COMMENTEDurl = {http://www.monolith.zone/},
year = {2018}
}
@article{mills2003polymer,
abstract = {Three areas, where polymer foam products are used in personal protection, are reviewed to contrast the foam micromechanisms and the use of Finite Element Analysis (FEA) for engineering design. For flexible open-cell foams used for seating cushions, the main deformation mechanism is cell edge bending; regular cell models can predict much of the compressive response. Hyperelastic FEA models can then predict the forces for foam indentation. For flexible closed-cell foams used in shoe midsoles, cell air compression dominates the response; diffusive air loss leads to foam deterioration with use. Hyperelastic FEA models can predict the interaction between the foam and the heelpad. Finally, for rigid closed-cell foams used in helmets, the permanent stretching and wrinkling of cell faces dominates the response. Crushable foam FEA models, which consider the yield surface and hardening, predict different responses for impacts on the road and on a kerbstone. {\textcopyright} 2003 Elsevier Ltd. All rights reserved.},
author = {Mills, N. J. and Fitzgerald, C. and Gilchrist, A. and Verdejo, R.},
doi = {10.1016/S0266-3538(03)00272-0},
file = {:home/t.kuipers/Downloads/1-s2.0-S0266353803002720-main.pdf:pdf},
isbn = {0266-3538},
COMMENTEDissn = {02663538},
journal = {Composites Science and Technology},
number = {16},
pages = {2389--2400},
publisher = {Elsevier},
title = {{Polymer foams for personal protection: Cushions, shoes and helmets}},
volume = {63},
year = {2003}
}
@misc{Millsaps2016,
annote = {(accessed April, 2017)},
author = {Millsaps, Bridget Butler},
title = {{Lunavast Craftehbot 3D Printer Kit}},
COMMENTEDurl = {https://3dprint.com/114671/lunavast-craftehbot-3d-printer/},
year = {2016}
}
@article{ISI:000388048800001,
author = {Mirzendehdel, Amir M and Suresh, Krishnan},
doi = {10.1016/j.cad.2016.08.006},
COMMENTEDissn = {0010-4485},
journal = {COMPUTER-AIDED DESIGN},
month = {dec},
pages = {1--13},
title = {{Support structure constrained topology optimization for additive manufacturing}},
volume = {81},
year = {2016}
}
@article{Moesen2011,
abstract = {Today's software for laser-based additive manufacturing compensates for the finite dimensions of the laser spot by insetting the contours of a solid part. However, features having smaller dimensions are removed by this operation, which may significantly alter the structure of thin-walled parts. To avoid potential production errors, this work describes in detail an algorithmic framework that makes beam compensation more reliable by computing laser scan paths for thin features. The geometry of the features can be adjusted by the scan paths by means of five intuitive parameters, which are illustrated with examples. Benchmarks show that the scan path generation comes at a reasonable cost without altering the computational complexity of the overall beam compensation framework. The framework was applied to Selective Laser Melting (SLM) to demonstrate that it can significantly improve the robustness of additive manufacturing. Besides robustness, the framework is expected to allow further improvements to the accuracy of additive manufacturing by enabling a geometry-dependent determination of the laser parameters. {\textcopyright} 2011 Elsevier Ltd. All rights reserved.},
author = {Moesen, Maarten and Craeghs, Tom and Kruth, Jean Pierre and Schrooten, Jan},
doi = {10.1016/j.cad.2011.03.004},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448511000650-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {Beam compensation,Laser-based additive manufacturing,Medial axis transform,Polygon offsetting,Tissue engineering scaffold},
number = {8},
pages = {876--888},
publisher = {Elsevier},
title = {{Robust beam compensation for laser-based additive manufacturing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cad.2011.03.004},
volume = {43},
year = {2011}
}
@article{Mohsenizadeh2018,
abstract = {Recent developments in architectural design and additive manufacturing (AM) techniques have led to advances in the design and fabrication of metamaterials. We demonstrate that by precisely designing the architecture of a lattice structure and implementing the accurate and cost-effective capabilities of polymer-based AM, it is possible to create lightweight and strong structures that are highly energy absorbing, able to recover their shape after extreme deformation, and have a high strength-over-weight ratio. Largescale AM lattices with various densities of unit cells were fabricated from two different polymers. The densities of the structures ranged from 66 kg/m3 to 192 kg/m3. Compression experiments established the scaling of their strength and stiffness with their relative density and revealed that the structures were able to recover their original shape after a compression up to 70{\%} strain. The energy absorption efficiency of the structures was 11{\%} higher than Duocel{\textregistered} aluminum foam and comparable to that of aluminum honeycomb, expanded polystyrene (EPS) foams, and Skydex twin hemispheres. These unconventional mechanical properties substantiate the potential of architectural design along with additive manufacturing in various applications, not only at laboratory scale, but also at industrial level.},
author = {Mohsenizadeh, Mehrdad and Gasbarri, Federico and Munther, Michael and Beheshti, Ali and Davami, Keivan},
doi = {10.1016/j.matdes.2017.11.037},
file = {:home/t.kuipers/Downloads/1-s2.0-S0264127517310687-main.pdf:pdf},
COMMENTEDissn = {18734197},
journal = {Materials and Design},
keywords = {3D printing,Additive manufacturing,Energy absorption,Metamaterials,Shape-recovering},
pages = {521--530},
publisher = {Elsevier},
title = {{Additively-manufactured lightweight Metamaterials for energy absorption}},
COMMENTEDurl = {https://doi.org/10.1016/j.matdes.2017.11.037},
volume = {139},
year = {2018}
}
@article{Morovi2019,
author = {Morovi, Peter},
file = {:home/t.kuipers/Downloads/10.1007@s00158-019-02240-8.pdf:pdf},
keywords = {3d-printing,additive manufacturing,color,halftoning,materials,multi-material fabrication,structure},
title = {{Co-optimization of color and mechanical properties by volumetric voxel control}},
year = {2019}
}
@article{Morovic2017,
author = {Morovic, Peter},
file = {:home/t.kuipers/Downloads/cic25{\_}hans3d{\_}20170710{\_}final{\_}NEW.pdf:pdf},
COMMENTEDissn = {21692629},
number = {September},
title = {{HANS3D : A Multi-Material , Volumetric , Voxel- By-Voxel Content Processing Pipeline for Color and Beyond HANS3D : A Multi-Material , Volumetric , Voxel-By-Voxel Content Processing Pipeline for Color and Beyond}},
year = {2017}
}
@article{morton1966computer,
author = {Morton, Guy M},
file = {:home/t.kuipers/Downloads/Morton1966.pdf:pdf},
pages = {302},
publisher = {International Business Machines Company New York},
title = {{A computer oriented geodetic data base and a new technique in file sequencing}},
year = {1966}
}
@article{N.Turner2014,
abstract = {Purpose - The purpose of this paper is to systematically and critically review the literature related to process design and modeling of fused deposition modeling (FDM) and similar extrusion-based additive manufacturing (AM) or rapid prototyping processes. Design/methodology/approach - A systematic review of the literature focusing on process design and mathematical process modeling was carried out. Findings - FDM and similar processes are among the most widely used rapid prototyping processes with growing application in finished part manufacturing. Key elements of the typical processes, including the material feed mechanism, liquefier and print nozzle; the build surface and environment; and approaches to part finishing are described. Approaches to estimating the motor torque and power required to achieve a desired filament feed rate are presented. Models of required heat flux, shear on the melt and pressure drop in the liquefier are reviewed. On leaving the print nozzle, die swelling and bead cooling are considered. Approaches to modeling the spread of a deposited road of material and the bonding of polymer roads to one another are also reviewed. Originality/value - To date, no other systematic review of process design and modeling research related to melt extrusion AM has been published. Understanding and improving process models will be key to improving system process controls, as well as enabling the development of advanced engineering material feedstocks for FDM processes.},
author = {{N. Turner}, Brian and Strong, Robert and {A. Gold}, Scott},
doi = {10.1108/RPJ-01-2013-0012},
file = {:home/t.kuipers/Downloads/ca88a4a39d828979b80603743e1831e31b99.pdf:pdf},
isbn = {1355-2546},
COMMENTEDissn = {1355-2546},
journal = {Rapid Prototyping Journal},
keywords = {,bead spreading,fdm,fused deposition modeling,liquefier dynamics,melt extrusion manufacturing,paper type literature review,process modeling},
number = {3},
pages = {192--204},
title = {{A review of melt extrusion additive manufacturing processes: I. Process design and modeling}},
COMMENTEDurl = {http://www.emeraldinsight.com/doi/10.1108/RPJ-01-2013-0012},
volume = {20},
year = {2014}
}
@article{nachtigall2018,
abstract = {In this case study three designers supported by multiple stakeholders created a pair of fully personalized printed high heel shoes in a period of two months for a single user. The shoes are made with soft and flexible materials for dynamic fit and use. The shoes are not only uniquely formed to the user's feet but the geometry of the material is designed to support and flex with the movement of each foot. These shoes utilize a 4D printing approach in the way they are made to fit the user while they move and change. Designing a shoe to such a degree represents a form of Ultra Personalization. This case study of an ultra personalized approach addresses the negotiation of key design considerations: aesthetics, comfort, robustness, balance and temperature. The findings inform digital fabrication design, software, and tools for designers.},
author = {Nachtigall, Troy Robert and Tomico, Oscar and Wakkary, Ron and Wensveen, Stephan and van Dongen, Pauline and {Tentoff van Norten}, Leonie},
doi = {10.1145/3170427.3174369},
file = {:home/t.kuipers/Downloads/nachtigall2018.pdf:pdf},
isbn = {9781450356213},
journal = {Extended Abstracts of the 2018 CHI Conference on Human Factors in Computing Systems - CHI '18},
pages = {1--9},
title = {{Towards Ultra Personalized 4D Printed Shoes}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=3170427.3174369},
year = {2018}
}
@article{nair2017hilbert,
abstract = {The paper presents a systematic strategy for implementing Hilbert's space filling curve for use in online exploration tasks and addresses its application in scenarios wherein the space to be searched obstacles (or holes) whose locations are not known a priori. Using the self-similarity and locality preserving properties of Hilbert's space filling curve, a set of evasive maneuvers are prescribed and characterized for online implementation. Application of these maneuvers in the case of non-uniform coverage of spaces and for obstacles of varying sizes is also presented. The results are validated with representative simulations demonstrating the deployment of the approach.},
archivePrefix = {arXiv},
arxivId = {1709.02938},
author = {Nair, Siddharth H. and Sinha, Arpita and Vachhani, Leena},
COMMENTEDeprint = {1709.02938},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Nair, Sinha, Vachhani - 2017 - Hilbert's Space-filling Curve for Regions with Holes.pdf:pdf},
isbn = {9781509028726},
journal = {arXiv preprint arXiv:1709.02938},
title = {{Hilbert's Space-filling Curve for Regions with Holes}},
COMMENTEDurl = {http://arxiv.org/abs/1709.02938},
year = {2017}
}
@article{Nelaturi2014,
abstract = {Additive manufacturing, or 3D printing, is the process of building three-dimensional solid shapes by accumulating material laid out in sectional layers. Additive manufacturing has been recognized for enabling production of complex custom parts that are difficult to manufacture otherwise. However, the dependence on build orientation and physical limitations of printing processes invariably lead to geometric deviations between manufactured and designed shapes that are usually evaluated after manufacture. In this paper, we formalize the measurement of such deviations in terms of a printability map that simulates the printing process and partitions each printed layer into disjoint regions with distinct local measures of size. We show that manufacturing capabilities, such as printing resolution, and material specific design recommendations, such as minimal feature sizes, may be coupled in the printability map to evaluate expected deviations before manufacture. Furthermore, we demonstrate how partitions with size measures below required resolutions may be modified using properties of the medial axis transform and use the corrected printability map to construct a representation of the manufactured model. We conclude by discussing several applications of the printability map for additive manufacturing.},
author = {Nelaturi, Saigopal and Kim, Walter and Kurtoglu, Tolga},
doi = {10.1115/1.4029374},
file = {:home/t.kuipers/Downloads/manu{\_}137{\_}02{\_}021015.pdf:pdf},
COMMENTEDissn = {1087-1357},
journal = {Journal of Manufacturing Science and Engineering},
number = {2},
pages = {021015},
title = {{Manufacturability Feedback and Model Correction for Additive Manufacturing}},
volume = {137},
year = {2014}
}
@article{Ngo2018,
abstract = {Freedom of design, mass customisation, waste minimisation and the ability to manufacture complex structures, as well as fast prototyping, are the main benefits of additive manufacturing (AM) or 3D printing. A comprehensive review of the main 3D printing methods, materials and their development in trending applications was carried out. In particular, the revolutionary applications of AM in biomedical, aerospace, buildings and protective structures were discussed. The current state of materials development, including metal alloys, polymer composites, ceramics and concrete, was presented. In addition, this paper discussed the main processing challenges with void formation, anisotropic behaviour, the limitation of computer design and layer-by-layer appearance. Overall, this paper gives an overview of 3D printing, including a survey on its benefits and drawbacks as a benchmark for future research and development.},
author = {Ngo, Tuan D. and Kashani, Alireza and Imbalzano, Gabriele and Nguyen, Kate T.Q. and Hui, David},
doi = {10.1016/j.compositesb.2018.02.012},
file = {:home/t.kuipers/Downloads/1-s2.0-S1359836817342944-main.pdf:pdf},
COMMENTEDissn = {13598368},
journal = {Composites Part B: Engineering},
keywords = {3D printing,Additive manufacturing,Aerospace,Biomaterials,Buildings,Ceramics,Composites,Concrete,Metal alloys,additive manufacturing,protective structures},
number = {December 2017},
pages = {172--196},
publisher = {Elsevier},
title = {{Additive manufacturing (3D printing): A review of materials, methods, applications and challenges}},
COMMENTEDurl = {http://linkinghub.elsevier.com/retrieve/pii/S1359836817342944},
volume = {143},
year = {2018}
}
@article{Nyman2015,
author = {Nyman, Asger and B{\ae}rentzen, J Andreas and Nobel-j{\o}rgensen, Morten and Aage, Niels and Sigmund, Ole},
doi = {10.1016/j.cag.2014.09.021},
file = {:home/t.kuipers/Downloads/1-s2.0-S0097849314001095-main.pdf:pdf},
COMMENTEDissn = {0097-8493},
journal = {Computers and Graphics},
keywords = {Deformable simplicial complex method,Shape optimization,Structural design,Topology optimization,topology optimization},
pages = {25--35},
publisher = {Elsevier},
title = {{Computers {\&} Graphics Combined shape and topology optimization of 3D structures}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cag.2014.09.021},
volume = {46},
year = {2015}
}
@article{Oftadeh2014,
abstract = {Hexagonal honeycomb structures are known for their high strength and low weight.We construct a new class of fractal-appearing cellular metamaterials by replacing each three-edge vertex of a base hexagonal network with a smaller hexagon and iterating this process. The mechanical properties of the structure after different orders of the iteration are optimized. We find that the optimal structure (with highest in-plane stiffness for a given weight ratio) is self-similar but requires higher order hierarchy as the density vanishes. These results offer insights into howincorporating hierarchy in the material structure can create low-density metamaterials with desired properties and function.},
author = {Oftadeh, Ramin and Haghpanah, Babak and Vella, Dominic and Boudaoud, Arezki and Vaziri, Ashkan},
doi = {10.1103/PhysRevLett.113.104301},
file = {:home/t.kuipers/Downloads/PhysRevLett.113.104301.pdf:pdf},
isbn = {0031-9007$\backslash$r1079-7114},
COMMENTEDissn = {10797114},
journal = {Physical Review Letters},
number = {10},
pages = {1--5},
pmid = {25238362},
title = {{Optimal fractal-like hierarchical honeycombs}},
volume = {113},
year = {2014}
}
@article{Panesar2014,
abstract = {See, stats, and : https : / / www . researchgate . net / publication / 299976766 Design 3D Conference READS 5 5 , including : Ajit University 11 SEE Ian University 213 , 247 SEE Ricky University 102 , 073 SEE Richard . M . Hague University 120 , 346 SEE All - text , letting . Available : Ajit Retrieved : 05 Abstract An optimization based design methodology for the additive manufacture of multi - functional parts (for example , a structure with embedded electronic / electrical systems and associated conductive paths) is presented . This work introduces a coupled optimization strategy where Topology Optimization (TO) is combined with an automated placement and routing approach that enables determination of an efficient internal system configuration . This permits the effect of the incorporation of the internal system on the structural response of the part to be taken into account and therefore enables the overall optimization of the structure - system unit . An example test case is included in the paper to evaluate the optimization strategy and demonstrate the methods effectiveness . The capability of this method allows the exploitation of the manufacturing capability under development within the Additive Manufacturing (AM) community to produce 3D internal systems within complex structures .},
author = {Panesar, A and Brackett, D and Ashcroft, I and Wildman, R and Hague, R},
file = {:home/t.kuipers/Downloads/05ca2d55c077b19c6681a8db700009dc3e46.pdf:pdf},
journal = {25th Interational Solid Freeform Fabrication Symposium},
pages = {1179--1193},
title = {{Design Optimization Strategy for Multifunctional 3D Printing}},
year = {2014}
}
@article{Panesar2018,
abstract = {A number of strategies that enable lattice structures to be derived from Topology Optimisation (TO) results suitable for Additive Manufacturing (AM) are presented. The proposed strategies are evaluated for mechanical performance and assessed for AM specific design related manufacturing considerations. From a manufacturing stand-point, support structure requirement decreases with increased extent of latticing, whereas the design-to-manufacture discrepancies and the processing efforts, both in terms of memory requirements and time, increase. Results from Finite Element (FE) analysis for the two loading scenarios considered: intended loading, and variability in loading, provide insight into the solution optimality and robustness of the design strategies. Lattice strategies that capitalised on TO results were found to be considerably (∼40–50{\%}) superior in terms of specific stiffness when compared to the structures where this was not the case. The Graded strategy was found to be the most desirable from both the design and manufacturing perspective. The presented pros-and-cons for the various proposed design strategies aim to provide insight into their suitability in meeting the challenges faced by the AM design community.},
author = {Panesar, Ajit and Abdi, Meisam and Hickman, Duncan and Ashcroft, Ian},
doi = {10.1016/j.addma.2017.11.008},
file = {:home/t.kuipers/Downloads/Strategies{\_}for{\_}functionally{\_}graded{\_}lattice{\_}structures{\_}derived{\_}using{\_}topology{\_}optimisation{\_}for{\_}Additive{\_}Manufacturing.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Design for additive manufacturing,Finite element analysis,Functional grading,Lattice structures,Topology optimisation},
pages = {81--94},
publisher = {Elsevier B.V.},
title = {{Strategies for functionally graded lattice structures derived using topology optimisation for Additive Manufacturing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.addma.2017.11.008},
volume = {19},
year = {2018}
}
@article{panetta2018,
author = {Panetta, Julian and Rahimian, Abtin and Zorin, Denis},
doi = {10.1145/3072959.3073649},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Panetta, Rahimian, Zorin - 2017 - Worst-case stress relief for microstructures.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {additive fabrication,deformable objects,goal-based material design,homogenization,microstructures,shape optimization,stress minimization},
month = {jul},
number = {4},
pages = {1--16},
publisher = {ACM},
title = {{Worst-case stress relief for microstructures}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=3072959.3073649},
volume = {36},
year = {2017}
}
@article{panetta2015,
author = {Panetta, Julian and Zhou, Qingnan and Malomo, Luigi and Pietroni, Nico and Cignoni, Paolo and Zorin, Denis},
doi = {10.1145/2766937},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Panetta et al. - 2015 - Elastic textures for additive fabrication.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {additive fabrication,deformable objects,goal-based material design,homogenization,microstructures,shape optimization},
month = {jul},
number = {4},
pages = {135:1--135:12},
publisher = {ACM},
title = {{Elastic textures for additive fabrication}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2809654.2766937},
volume = {34},
year = {2015}
}
@inproceedings{ISI:000380549300072,
annote = {Conference on Computer-Aided Architectural Design Research in Asia
(CAADRIA), Korea Society of Modern Hanok, Daegu, SOUTH KOREA, MAY 20-23,
2015},
author = {Park, Daekwon and Lee, Juhun and Romo, Alejandra},
booktitle = {Proceedings of the 20th International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2015): EMERGING EXPERIENCES IN THE PAST, PRESENT AND FUTURE OF DIGITAL ARCHITECTURE},
editor = {{Ikeda, Y and Herr, CM and Holzer, D and Kaijima, S and Kim, MJ and Schnabel, MA}},
isbn = {978-988-19026-6-5},
pages = {735--744},
title = {{POISSON'S RATIO MATERIAL DISTRIBUTIONS Variable Poisson's ratio material systems for adaptive building applications}},
year = {2015}
}
@article{Patton2019,
author = {Patton, Michael V. and Ryan, Pat and Calascione, Thomas and Fischer, Nathan and Morgenstern, Andrew and Stenger, Nathan and Nelson-Cheeseman, Brittany B.},
doi = {10.1016/j.addma.2019.03.026},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860418309758-main.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
publisher = {Elsevier B.V.},
title = {{Manipulating Magnetic Anisotropy in Fused Filament Fabricated Parts via Macroscopic Shape, Mesoscopic Infill Orientation, and Infill Percentage}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S2214860418309758},
year = {2019}
}
@inproceedings{pele2008linear,
author = {Pele, Ofir and Werman, Michael},
booktitle = {European conference on computer vision},
file = {:home/t.kuipers/Downloads/ECCV2008.pdf:pdf},
organization = {Springer},
pages = {495--508},
title = {{A linear time histogram metric for improved sift matching}},
year = {2008}
}
@inproceedings{pele2009fast,
author = {Pele, Ofir and Werman, Michael},
booktitle = {ICCV},
file = {:home/t.kuipers/Downloads/ICCV2009.pdf:pdf},
pages = {460--467},
title = {{Fast and robust Earth Mover's Distances.}},
volume = {9},
year = {2009}
}
@article{192468,
author = {Peleg, S and Werman, M and Rom, H},
doi = {10.1109/34.192468},
file = {:home/t.kuipers/Downloads/00192468.pdf:pdf},
isbn = {0162882818910},
COMMENTEDissn = {0162-8828},
journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
keywords = {,Application software,Computer graphics,Computer vision,Image analysis,Image coding,Image resolution,Read only memory,Signal resolution,Spatial resolution,Tail,computer vision,graph theory,gray-level requantization,gray-tone image,half-tone image,resolution change,spatial resampling},
month = {jul},
number = {7},
pages = {739--742},
publisher = {IEEE},
title = {{A unified approach to the change of resolution: space and gray-level}},
volume = {11},
year = {1989}
}
@article{Peng2019,
author = {Peng, Hao and Lu, Lin and Liu, Lin and Sharf, Andrei and Chen, Baoquan},
doi = {10.1016/j.cad.2019.05.029},
file = {:home/t.kuipers/Downloads/1-s2.0-S001044851930212X-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {3d printing,3d qr code,ambient occlusion,arbitrary surface},
publisher = {Elsevier},
title = {{Fabricating QR codes on 3D objects using self-shadows}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S001044851930212X},
year = {2019}
}
@inproceedings{ISI:000393363400010,
annote = {ASME International Design Engineering Technical Conferences and
Computers and Information in Engineering Conference (IDETC/CIE),
Charlotte, NC, AUG 21-24, 2016},
author = {Pham, Trung and Hoyle, Christopher and Zhang, Yue and Nguyen, Tam},
booktitle = {PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE, 2016, VOL 2B},
isbn = {978-0-7918-5011-4},
pages = {117--124},
title = {{TOPOLOGY OPTIMIZATION OF HYPERELASTIC CONTINUA}},
year = {2016}
}
@article{Platzman1989,
author = {Platzman, Loren K. and Bartholdi, John J.},
doi = {10.1145/76359.76361},
file = {:home/t.kuipers/Downloads/p719-platzman.pdf:pdf},
COMMENTEDissn = {00045411},
journal = {Journal of the ACM},
number = {4},
pages = {719--737},
title = {{Spacefilling curves and the planar travelling salesman problem}},
COMMENTEDurl = {http://portal.acm.org/citation.cfm?doid=76359.76361},
volume = {36},
year = {1989}
}
@article{polya1913uber,
author = {Polya, George},
journal = {Bull. Acad. Sci. Cracovie (Sci. math. et nat. S{\'{e}}rie A)},
pages = {305--313},
title = {{Uber eine Peanosche kurve}},
year = {1913}
}
@inproceedings{poynton2004color,
author = {Poynton, Charles and Johnson, Garrett},
booktitle = {ACM SIGGRAPH 2004 Course Notes},
organization = {ACM},
pages = {3},
title = {{Color science and color appearance models for CG, HDTV, and D-CINEMA}},
year = {2004}
}
@article{Prasad1997,
author = {Prasad, Lakshman},
file = {:home/t.kuipers/Downloads/ea7506b8dff95867a00eb639be2b82ce4208.pdf:pdf},
title = {{Morphological Analysis of Shapes 1 Introduction 2 Multiscale Discretization of the Boundary of a Shape}},
year = {1997}
}
@inproceedings{praun2001real,
author = {Praun, Emil and Hoppe, Hugues and Webb, Matthew and Finkelstein, Adam},
booktitle = {Proceedings of the 28th annual conference on Computer graphics and interactive techniques},
file = {:home/t.kuipers/Downloads/p581-praun.pdf:pdf},
organization = {ACM},
pages = {581},
title = {{Real-time hatching}},
year = {2001}
}
@article{Prevost2013,
author = {Pr{\'{e}}vost, Romain and Whiting, Emily and Lefebvre, Sylvain and Sorkine-Hornung, Olga},
doi = {10.1145/2461912.2461957},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Pr{\'{e}}vost et al. - 2013 - Make it stand.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,interactive shape modeling,optimization,static equilibrium,structural stability},
month = {jul},
number = {4},
pages = {1},
publisher = {ACM},
title = {{Make it stand}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2461912.2461957},
volume = {32},
year = {2013}
}
@article{ISI:000403486200003,
author = {Qian, Xiaoping},
doi = {10.1002/nme.5461},
COMMENTEDissn = {0029-5981},
journal = {INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING},
month = {jul},
number = {3},
pages = {247--272},
title = {{Undercut and overhang angle control in topology optimization: A density gradient based integral approach}},
volume = {111},
year = {2017}
}
@misc{slic3r,
author = {{Ranellucci, Alessandro}},
title = {{Slic3r}},
COMMENTEDurl = {http://slic3r.org/},
year = {2015}
}
@article{ISI:000401817300007,
author = {Ranjan, Rajit and Samant, Rutuja and Anand, Sam},
doi = {10.1115/1.4035216},
COMMENTEDissn = {1087-1357},
journal = {JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME},
month = {jun},
number = {6},
title = {{Integration of Design for Manufacturing Methods With Topology Optimization in Additive Manufacturing}},
volume = {139},
year = {2017}
}
@inproceedings{ReddyK.2016,
abstract = {Topology optimization is finding renewed interest thanks to additive manufacturing-a technology that is well-suited to fabricate the complex organic shapes and structures that often arise from topology optimization. This paper reviews the current state of topology optimization software through the redesign of a real aerospace mounting plate, focusing on manufacturing considerations that are important for additive manufacturing (AM). Twenty different commercial and educational software tools are investigated and categorized based on their capabilities. Two representative software tools are then demonstrated with well-known examples to compare user interfaces and outputs, and one is chosen to perform the mounting plate case study. We find that all of the commercially available topology optimization software packages offer similar capabilities and considerably more functionality than educational software, but only a few niche products can be tailored to specific applications and manufacturing processes. Current commercial software does not provide adequate manufacturing constraints to remove the need for manual interpretation of results for additive manufacture. A case study involving optimization of an industry-relevant component for AM is used to provide in-depth understanding of both topology optimization and manufacturing considerations in AM. Shortcomings in the existing software tools are presented, and future requirements to take advantage of the increasing AM capabilities, particularly in metals, are discussed. {\textcopyright} Copyright 2016 by ASME.},
author = {{Reddy K.}, Sai Nithin and Ferguson, Ian and Frecker, Mary and Simpson, Timothy W. and Dickman, Corey J.},
booktitle = {Volume 2A: 42nd Design Automation Conference},
doi = {10.1115/DETC2016-59718},
isbn = {978-0-7918-5010-7},
title = {{Topology Optimization Software for Additive Manufacturing: A Review of Current Capabilities and a Real-World Example}},
year = {2016}
}
@inproceedings{ISI:000393362900030,
annote = {ASME International Design Engineering Technical Conferences and
Computers and Information in Engineering Conference (IDETC/CIE),
Charlotte, NC, AUG 21-24, 2016},
author = {Reddy, Sai Nithin K and Maranan, Vincent and Simpson, Timothy W and Palmer, Todd and Dickman, Corey J},
booktitle = {PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE, 2016, VOL 2A},
isbn = {978-0-7918-5010-7},
title = {{APPLICATION OF TOPOLOGY OPTIMIZATION AND DESIGN FOR ADDITIVE MANUFACTURING GUIDELINES ON AN AUTOMOTIVE COMPONENT}},
year = {2016}
}
@inproceedings{reiner2014dual,
author = {Reiner, Tim and Carr, Nathan and M{\v{e}}ch, Radom{\$}\backslash{\$}'{\$}\backslash{\$}ir Radom{\$}\backslash{\$}'{\$}\backslash{\$}ir Radomir and {\v{S}}t'ava, Ondrej Ond{\$}\backslash{\$}vrej Ond{\$}\backslash{\$}vrej and Dachsbacher, Carsten and Miller, Gavin},
booktitle = {Computer Graphics Forum},
file = {:home/t.kuipers/Downloads/DualColorMixing.pdf:pdf},
pages = {479--486},
title = {{Dual-color mixing for fused deposition modeling printers}},
volume = {33},
year = {2014}
}
@article{Reiner2016,
abstract = {We introduce an interactive sculpting approach that enables modeling of support-free objects: objects which do not require any
support structures during 3D printing. We propose three operators – trim, preserve, grow – to maintain the support-free property
during interactive modeling. These operators let us define brushes that perform either in an unconstrained manner (adapting
the shape to the brush effect), or selectively discard changes inside the brush volume. Our technique can be applied to many
modeling operations and we demonstrate it on brushes for adding or removing matter. We describe an efficient implementation of
a voxel-based modeling tool that produces only support-free shapes, and show example shapes modeled within minutes},
author = {Reiner, Tim and Lefebvre, Sylvain},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Reiner, Lefebvre - 2016 - Interactive Modeling of Support-free Shapes for Fabrication.pdf:pdf},
month = {may},
title = {{Interactive Modeling of Support-free Shapes for Fabrication}},
COMMENTEDurl = {https://hal.inria.fr/hal-01401470/},
year = {2016}
}
@article{ISI:000260967400002,
annote = {7th World Congress on Structural and Multidisciplinary Optimization,
COEX, Seoul, SOUTH KOREA, MAY 21-25, 2007},
author = {Rozvany, G I N},
doi = {10.1007/s00158-007-0217-0},
COMMENTEDissn = {1615-147X},
journal = {STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION},
month = {jan},
number = {3},
pages = {217--237},
title = {{A critical review of established methods of structural topology optimization}},
volume = {37},
year = {2009}
}
@inproceedings{ruan2002automatic,
author = {Ruan, Jianzhong and Eiamsa-ard, Kunnayut and Zhang, Jun and Liou, Frank W},
booktitle = {ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference},
file = {:home/t.kuipers/Downloads/ruan2002.pdf:pdf},
organization = {American Society of Mechanical Engineers},
pages = {965--971},
title = {{Automatic process planning of a multi-axis hybrid manufacturing system}},
year = {2002}
}
@inproceedings{710701,
author = {Rubner, Yossi and Tomasi, Carlo and Guibas, Leonidas J},
booktitle = {Sixth International Conference on Computer Vision (IEEE Cat. No.98CH36271)},
doi = {10.1109/ICCV.1998.710701},
file = {:home/t.kuipers/Downloads/00710701.pdf:pdf},
keywords = {,Application software,Computer displays,Computer science,Frequency,Geoscience,Histograms,Image databases,Image retrieval,Navigation,Psychology,color,distributions,easy-to-compute lower bounds,image colour analysis,image databases,image texture,linear optimization,multi-dimensional scaling displays,partial matching,texture,transportation problem,visual databases},
month = {jan},
pages = {59--66},
title = {{A metric for distributions with applications to image databases}},
year = {1998}
}
@misc{Saadlaoui2017,
abstract = {Additive manufacturing methods provide an increasingly popular industrial means of producing complex mechanical parts when classical methods are not suitable. The main advantage of these methods is the great freedom they give designers. At the same time, theoretical and numerical topology optimization tools can be used to simulate structures with complex shapes which exactly meet the mechanical constraints while requiring as little material as possible. Combining topology optimization and additive production procedures therefore seems to be a promising approach for obtaining optimized mechanical parts. Nonetheless structures obtained via topology optimization are composed of parts of composite densities which can not produced via additive manufacturing. Only numerical structures made of full or empty spaces only can be produced by additive methods. This can be obtained at the end of computational optimization through a penalization step which gives the composite densities from 0 to 1 the values 0 or 1. This means that the final part is different from the best solution predicted by topology optimization calculations. It therefore seemed to be worth checking the validity of an engineering approach in which additive methods are used to manufacture structures based on the use of industrial topology optimization codes. Here the authors propose to study, in the case of a simple mechanical problem, that of a metal cube subjected to a given pressure, three procedures, which differed in terms of the code and type of topology optimization calculations performed and the level of penalization applied. The three structures thus obtained were then produced using additive methods. Since all three structures proved to be mechanically resistant, the three procedures used can be said to be valid. However, one of them yielded better compromise between the mechanical strength and the amount of material saved.},
author = {Saadlaoui, Yassine and Milan, Jean Louis and Rossi, Jean Marie and Chabrand, Patrick},
booktitle = {Journal of Manufacturing Systems},
doi = {10.1016/j.jmsy.2017.03.006},
COMMENTEDissn = {02786125},
title = {{Topology optimization and additive manufacturing: Comparison of conception methods using industrial codes}},
volume = {43},
year = {2017}
}
@book{sagan2012space,
author = {Sagan, Hans},
publisher = {Springer Science {\&} Business Media},
title = {{Space-filling curves}},
year = {2012}
}
@article{schumacher2015,
abstract = {We propose a method for fabricating deformable objects with spa- tially varying elasticity using 3D printing. Using a single, relatively stiff printer material, our method designs an assembly of small- scale microstructures that have the effect of a softer material at the object scale, with properties depending on the microstructure used in each part of the object. We build on work in the area of meta- materials, using numerical optimization to design tiled microstruc- tures with desired properties, but with the key difference that our method designs families of related structures that can be interpo- lated to smoothly vary the material properties over a wide range. To create an object with spatially varying elastic properties, we tile the object's interior with microstructures drawn from these families, generating a different microstructure for each cell using an efficient algorithm to select compatible structures for neighboring cells. We show results computed for both 2D and 3D objects, validating sev- eral 2D and 3D printed structures using standard material tests as well as demonstrating various example applications.},
author = {Schumacher, Christian and Bickel, Bernd and Rys, Jan and Marschner, Steve and Daraio, Chiara and Gross, Markus},
doi = {10.1145/2766926},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Schumacher et al. - 2015 - Microstructures to control elasticity in 3D printing.pdf:pdf},
isbn = {9781450333313},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,fabrication,topology optimization},
month = {jul},
number = {4},
pages = {136:1--136:13},
publisher = {ACM},
title = {{Microstructures to control elasticity in 3D printing}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2809654.2766926},
volume = {34},
year = {2015}
}
@article{seong2006trimming,
abstract = {A robust and efficient algorithm for trimming both local and global self-intersections in offset curves and surfaces is presented. Our scheme is based on the derivation of a rational distance map between the original curve or surface and its offset. By solving a bivariate polynomial equation for an offset curve or a system of three polynomial equations for an offset surface, all local and global self-intersection regions in offset curves or surfaces can be detected. The zero-set of polynomial equation(s) corresponds to the self-intersection regions. These regions are trimmed by projecting the zero-set into an appropriate parameter space. The projection operation simplifies the analysis of the zero-set, which makes the proposed algorithm numerically stable and efficient. Furthermore, in a post-processing step, a numerical marching method is employed, which provides a highly precise scheme for self-intersection elimination in both offset curves and surfaces. The effectiveness of our approach is demonstrated using several experimental results. {\textcopyright} 2005 Elsevier Ltd. All rights reserved.},
author = {Seong, Joon Kyung and Elber, Gershon and Kim, Myung Soo},
doi = {10.1016/j.cad.2005.08.002},
file = {:home/t.kuipers/Downloads/Elber-1-s2.0-S0010448505001491-main.pdf:pdf},
isbn = {0010-4485},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {Distance map,Global self-intersection,Local self-intersection,Offset curve,Offset surface,Zero-set computation},
number = {3},
pages = {183--193},
title = {{Trimming local and global self-intersections in offset curves/surfaces using distance maps}},
volume = {38},
year = {2006}
}
@article{Serdeczny2019,
author = {Serdeczny, Marcin P. and Comminal, Rapha{\"{e}}l and Pedersen, David B. and Spangenberg, Jon},
doi = {10.1016/j.addma.2019.05.024},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860418309217-main.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Fused deposition modeling,Material extrusion additive manufacturing,Mesostructure,Numerical simulations,Porosity,fused deposition modeling,material extrusion additive manufacturing,numerical simulations},
number = {November 2018},
pages = {419--429},
publisher = {Elsevier},
title = {{Numerical simulations of the mesostructure formation in material extrusion additive manufacturing}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S2214860418309217},
volume = {28},
year = {2019}
}
@inproceedings{Shaikh2016,
  title={Hilbert curve based toolpath for FDM process},
  author={Shaikh, Saquib and Kumar, Narendra and Jain, Prashant K and Tandon, Puneet},
  booktitle={CAD/CAM, Robotics and Factories of the Future},
  pages={751--759},
  year={2016},
  publisher={Springer},
doi = {10.1007/978-81-322-2740-3_72},
COMMENTEDeditor = {{Mandal, DK and Syan}, CS},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Shaikh et al. - 2016 - Hilbert Curve Based Toolpath for FDM Process.pdf:pdf},
COMMENTEDisbn = {2195-4356},
COMMENTEDissn = {2195-4356},
series = {Lecture Notes in Mechanical Engineering},
title = {{Hilbert Curve Based Toolpath for FDM Process}},
COMMENTEDurl = {http://link.springer.com/10.1007/978-81-322-2740-3{\_}72},
year = {2016}
}
@article{Shi2018,
abstract = {In the field of bone defect repair, gradient porous scaffolds have received increased attention because they provide a better environment for promoting tissue regeneration. In this study, we propose an effective method to generate bionic porous scaffolds based on the TPMS (triply periodic minimal surface) and SF (sigmoid function) methods. First, cortical bone morphological features (e.g., pore size and distribution) were determined for several regions of a rabbit femoral bone by analyzing CT-scans. A finite element method was used to evaluate the mechanical properties of the bone at these respective areas. These results were used to place different TPMS substructures into one scaffold domain with smooth transitions. The geometrical parameters of the scaffolds were optimized to match the elastic properties of a human bone. With this proposed method, a functional gradient porous scaffold could be designed and produced by an additive manufacturing method.},
author = {Shi, Jianping and Zhu, Liya and Li, Lan and Li, Zongan and Yang, Jiquan and Wang, Xingsong},
doi = {10.1038/s41598-018-25750-9},
file = {:home/t.kuipers/Downloads/A{\_}TPMS-based{\_}method{\_}for{\_}modeling{\_}porous{\_}scaffolds{\_}.pdf:pdf},
COMMENTEDissn = {20452322},
journal = {Scientific Reports},
number = {1},
publisher = {Springer US},
title = {{A TPMS-based method for modeling porous scaffolds for bionic bone tissue engineering}},
COMMENTEDurl = {http://dx.doi.org/10.1038/s41598-018-25750-9},
volume = {8},
year = {2018}
}
@article{sierpinski,
author = {Sierpi{\'{n}}ski, Wac{\l}aw Franciszek},
journal = {Bulletin de l'Acad{\'{e}}mie des Sciences de Cracovie - S{\'{e}}rie A},
pages = {pp. 463--478},
title = {{Sur une nouvelle courbe continue qui remplit toute une aire plane}},
year = {1912}
}
@article{sigmund1995tailoring,
abstract = {This paper describes a method to design the periodic microstructure of a material to obtain prescribed constitutive properties. The microstructure is modelled as a truss or thin frame structure in 2 and 3 dimensions. The problem of finding the simplest possible microstructure with the prescribed elastic properties can be called an inverse homogenization problem, and is formulated as an optimization problem of finding a microstructure with the lowest possible weight which fulfils the specified behavioral requirements. A full ground structure known from topology optimization of trusses is used as starting guess for the optimization algorithm. This implies that the optimal microstructure of a base cell is found from a truss or frame structure with 120 possible members in the 2-dimensional case and 2016 possible members in the 3-dimensional case. The material parameters are found by a numerical homogenization method, using Finite-Elements to model the representative base cell, and the optimization problem is solved by an optimality criteria method. Numerical examples in two and three dimensions show that it is possible to design materials with many different properties using base cells modelled as truss or frame works. Hereunder is shown that it is possible to tailor extreme materials, such as isotropic materials with Poisson's ratio close to - 1, 0 and 0.5, by the proposed method. Some of the proposed materials have been tested as macro models which demonstrate the expected behaviour. {\textcopyright} 1995.},
author = {Sigmund, Ole},
doi = {10.1016/0167-6636(94)00069-7},
file = {:home/t.kuipers/Downloads/1-s2.0-0167663694000697-main.pdf:pdf},
isbn = {0167-6636},
COMMENTEDissn = {01676636},
journal = {Mechanics of Materials},
keywords = {Extreme materials,Homogenization,Inverse problems,Material design,Micromechanics,Negative Poisson's ratio,Topology optimization},
number = {4},
pages = {351--368},
pmid = {24375708},
title = {{Tailoring materials with prescribed elastic properties}},
volume = {20},
year = {1995}
}
@article{Sitharam2018,
abstract = {State-of-the-art representations of volumetric multi-scale shape and structure can be classified into three broad categories: continuous, continuous-from-discrete, and discrete representations. We propose modeling micro-structure with a class of discrete Corner-Sharing Tetrahedra (CoSTs). CoSTs can represent bar-joint, tensegrity, line-incidence, and similar constraint systems that capture local physical constraints and global multi-scale properties for design and analysis. The paper develops a palette of simple geometry processing operations on CoSTs including graph manipulation, hierarchical refinement, randomization, and generating associated continuous representations.},
archivePrefix = {arXiv},
arxivId = {1806.05528},
author = {Sitharam, Meera and Youngquist, Jeremy and Nolan, Maxwell and Peters, J{\"{o}}rg},
COMMENTEDeprint = {1806.05528},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Sitharam et al. - 2018 - Corner-Sharing Tetrahedra for Modeling Micro-Structure.pdf:pdf},
title = {{Corner-Sharing Tetrahedra for Modeling Micro-Structure}},
year = {2018}
}
@book{snow2001plant,
author = {Snow, Dennis A},
file = {:home/t.kuipers/Downloads/sciencedirect-topic-illuminance.pdf:pdf},
publisher = {Elsevier},
title = {{Plant engineer's reference book}},
year = {2001}
}
@article{Song2017a,
abstract = {Layered manufacturing inherently suffers from staircase defects along surfaces that are gently slopped with respect to the build direction. Reducing the slice thickness improves the situation but never resolves it completely as flat layers remain a poor approximation of the true surface in these regions. In addition, reducing the slice thickness largely increases the print time. In this work we focus on a simple yet effective technique to improve the print accuracy for layered manufacturing by filament deposition. Our method works with standard three-axis 3D filament printers (e.g. the typical, widely available 3D printers), using standard extrusion nozzles. It better reproduces the geometry of sloped surfaces without increasing the print time. Our key idea is to perform a local anti-aliasing, working at a sub-layer accuracy to produce slightly curved deposition paths and reduce approximation errors. This is inspired by Computer Graphics anti-aliasing techniques which consider sub-pixel precision to treat aliasing effects. We show that the necessary deviation in height compared to standard slicing is bounded by half the layer thickness. Therefore, the height changes remain small and plastic deposition remains reliable. We further split and order paths to minimize defects due to the extruder nozzle shape, avoiding any change to the existing hardware. We apply and analyze our approach on 3D printed examples, showing that our technique greatly improves surface accuracy and silhouette quality while keeping the print time nearly identical.},
author = {Song, Hai-Chuan and Ray, Nicolas and Sokolov, Dmitry and Lefebvre, Sylvain},
doi = {10.1016/J.CAD.2017.04.001},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Song et al. - 2017 - Anti-aliasing for fused filament deposition.pdf:pdf},
COMMENTEDissn = {0010-4485},
journal = {Computer-Aided Design},
month = {aug},
pages = {25--34},
publisher = {Elsevier},
title = {{Anti-aliasing for fused filament deposition}},
COMMENTEDurl = {https://www.sciencedirect.com/science/article/pii/S0010448517300465},
volume = {89},
year = {2017}
}
@article{Song2017,
abstract = {Filament fused fabrication is the method of choice for printing 3D models at low cost, and is the de-facto standard for hobbyists, makers and schools. Unfortunately, filament printers cannot truly reproduce colored objects. The best current techniques rely on a form of dithering exploiting occlusion, that was only demonstrated for shades of two base colors and that behaves differently depending on surface slope. We explore a novel approach for 3D printing colored objects, capable of creating controlled gradients of varying sharpness. Our technique exploits off-the-shelves nozzles that are designed to mix multiple filaments in a small melting chamber, obtaining intermediate colors once the mix is stabilized. We exploit this property to produce color gradients. We divide each input layer into a set of sublayers, each having a different constant color. By locally changing the thickness of the sublayers, we change the color that is perceived at a given location. By optimizing the choice of colors of each sublayer, we further improve quality and allow the use of different numbers of input filaments. We demonstrate our results by building a functional color printer using low cost, off-the-shelves components. Using our tool a user can paint a 3D model and directly produce its physical counterpart, using any material and color available for fused filament fabrication.},
archivePrefix = {arXiv},
arxivId = {1709.09689},
author = {Song, Haichuan and Lefebvre, Sylvain},
COMMENTEDeprint = {1709.09689},
file = {:home/t.kuipers/Downloads/1709.09689.pdf:pdf},
title = {{Colored fused filament fabrication}},
COMMENTEDurl = {http://arxiv.org/abs/1709.09689},
year = {2017}
}
@article{Stankovic2017,
abstract = {The build orientation is one the most influential factors on material properties in additively manufactured parts. Advanced applications, such as lattice structures optimized for lightweight, often rely on small safety margins and are, hence, particularly affected, but research has not gone far beyond the pure empirical characterization. The focus of this paper is to investigate in detail the influence of anisotropy induced through fabrication on the mechanical performance and build orientation of whole structures when subject to optimization. First, a material property model for both compression and tension states is formulated. Then, the Generalized Optimality Criteria method is extended for fixed topology lattice structures with respect to constraints in displacement, stress, and Euler buckling. The two latter are formulated as local constraints that are handled in combination with Fully-Stressed Design recursion. The results reveal significant safety threads likely leading to premature failure when using properties from one-directional tests, as is so far the case, rather than the full anisotropy model developed herein. If used inversely, the algorithm yields the optimal orientation of a structure on the build platform, allowing further weight reduction while maintaining the mechanical properties.},
author = {Stankovi{\'{c}}, Tino and Mueller, Jochen and Shea, Kristina},
doi = {10.1016/j.addma.2017.07.004},
file = {:home/t.kuipers/Downloads/1-s2.0-S2214860417300593-main.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
title = {{The effect of anisotropy on the optimization of additively manufactured lattice structures}},
volume = {17},
year = {2017}
}
@article{stava2012,
author = {Stava, Ondrej and Vanek, Juraj and Benes, Bedrich and Carr, Nathan and M{\v{e}}ch, Radom{\'{i}}r},
doi = {10.1145/2185520.2185544},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Stava et al. - 2012 - Stress relief.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,physics-based modeling,structural analysis},
month = {jul},
number = {4},
pages = {1--11},
publisher = {ACM},
title = {{Stress relief}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2185520.2185544},
volume = {31},
year = {2012}
}
@article{steuben2016implicit,
abstract = {One crucial component of the additive manufacturing software toolchain is a class of geometric algorithms known as “slicers.” The purpose of the slicer is to compute a parametric toolpath and associated commands, which direct an additive manufacturing system to produce a physical realization of a three-dimensional input model. Existing slicing algorithms operate by application of geometric transformations upon the input geometry in order to produce the toolpath. In this paper we introduce a new implicit slicing algorithm based on the computation of toolpaths derived from the level sets of arbitrary heuristics-based or physics-based fields defined over the input geometry. This enables computationally efficient slicing of arbitrarily complex geometries in a straight forward fashion. Additionally, the calculation of component “infill” (as a process control parameter) is explored due to its crucial effect on functional performance fields of interest such as strain and stress distributions. Several examples of the application of the proposed implicit slicer are presented. Finally, an example demonstrating improved structural performance during physical testing is presented. We conclude with remarks regarding the strengths of the implicit approach relative to existing explicit approaches, and discuss future work required in order to extend the methodology.},
author = {Steuben, John C. and Iliopoulos, Athanasios P. and Michopoulos, John G.},
doi = {10.1016/j.cad.2016.04.003},
file = {:home/t.kuipers/Downloads/1-s2.0-S001044851630015X-main.pdf:pdf},
isbn = {978-0-7918-5007-7},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {,Additive manufacturing,Digital thread,Functionally tailored materials,Implicit slicer,Toolpath generation,g-code generator},
month = {aug},
pages = {107--119},
publisher = {Elsevier},
title = {{Implicit slicing for functionally tailored additive manufacturing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cad.2016.04.003 https://www.sciencedirect.com/science/article/pii/S001044851630015X},
volume = {77},
year = {2016}
}
@article{Steuben2018,
author = {Steuben, John and Iliopoulos, Athanasios P. and Michopoulos, John},
doi = {10.1115/1.4039312},
file = {:home/t.kuipers/Downloads/JCISE-17-1229.pdf:pdf},
COMMENTEDissn = {1530-9827},
journal = {Journal of Computing and Information Science in Engineering},
number = {c},
title = {{Multiscale Topology Optimization for Additively Manufactured Objects}},
COMMENTEDurl = {http://computingengineering.asmedigitalcollection.asme.org/article.aspx?doi=10.1115/1.4039312},
year = {2018}
}
@misc{Stratasys,
author = {Stratasys},
title = {{Stratasys J750}},
COMMENTEDurl = {http://usglobalimages.stratasys.com/Main/Files/Machine{\_}Spec{\_}Sheets/PSS{\_}PJ{\_}StratasysJ750{\_}0217a{\_}Web.pdf},
year = {2016}
}
@techreport{Stucki1981,
address = {Zurich},
author = {Stucki, Peter},
institution = {IBM Research Lab},
title = {{MECCA - A Multiple-Error Correcting Computation Algorithm for Bilevel Image Hardcopy Reproduction}},
year = {1981}
}
@inproceedings{Sud2007,
author = {Sud, Avneesh and Foskey, Mark and Manocha, Dinesh},
title = {Homotopy-Preserving Medial Axis Simplification},
year = {2005},
COMMENTEDisbn = {1595930159},
publisher = {Association for Computing Machinery},
COMMENTEDaddress = {New York, NY, USA},
COMMENTEDurl = {https://doi.org/10.1145/1060244.1060250},
doi = {10.1145/1060244.1060250},
booktitle = {Proceedings of the 2005 ACM Symposium on Solid and Physical Modeling},
pages = {39--50},
numpages = {12},
keywords = {medial axis, homotopy, simplification, separation angle, voronoi diagram},
location = {Cambridge, Massachusetts},
COMMENTEDseries = {SPM ’05}
}
@article{suwanprateeb2009development,
author = {Suwanprateeb, Jintamai and Suwanpreuk, Waraporn},
journal = {Rapid Prototyping Journal},
number = {1},
pages = {52--58},
publisher = {Emerald Group Publishing Limited},
title = {{Development of translucent and strong three dimensional printing models}},
volume = {15},
year = {2009}
}
@article{tamburrino2018,
author = {Tamburrino, Francesco and Graziosi, Serena and Bordegoni, Monica},
doi = {10.1115/1.4040131},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Tamburrino, Graziosi, Bordegoni - 2018 - The Design Process of Additively Manufactured Mesoscale Lattice Structures A Review.pdf:pdf},
COMMENTEDissn = {1530-9827},
journal = {Journal of Computing and Information Science in Engineering},
keywords = {Design,Struts (Engineering)},
month = {jul},
number = {4},
pages = {040801},
publisher = {American Society of Mechanical Engineers},
title = {{The Design Process of Additively Manufactured Mesoscale Lattice Structures: A Review}},
COMMENTEDurl = {http://computingengineering.asmedigitalcollection.asme.org/article.aspx?doi=10.1115/1.4040131},
volume = {18},
year = {2018}
}
@inproceedings{tuanase2004straight,
abstract = {Ketogenic diets (KDs), successfully used in the therapy of paediatric epilepsy for nearly a century, have recently shown beneficial effects also in cancer, obesity, diabetes, GLUT 1 deficiencies, hypoxia-ischemia, traumatic brain injuries, and neurodegeneration. The latter achievement designates aged individuals as optimal recipients, but concerns derive from possible age-dependent differences in KDs effectiveness. Indeed, the main factors influencing ketone bodies utilization by the brain (blood levels, transport mechanisms, catabolic enzymes) undergo developmental changes, although several reports indicate that KDs maintain some efficacy during adulthood and even during advanced aging. Encouraging results obtained in patients affected by age-related neurodegenerative diseases have prompted new interest on KDs' effect on the aging brain, also considering the poor efficacy of therapies currently used. However, recent morphological evidence in synapses of late-adult rats indicates that KDs consequences may be even opposite in different brain regions, likely depending on neuronal vulnerability to age. Thus, further studies are needed to design KDs specifically indicated for single neurodegenerative diseases, and to ameliorate the balance between beneficial and adverse effects in aged subjects. Here we review clinical and experimental data on KDs treatments, focusing on their possible use during pathological aging. Proposed mechanisms of action are also reported and discussed.},
author = {Tănase, Mirela and Veltkamp, Remco C},
booktitle = {European Symposium on Algorithms},
file = {:home/t.kuipers/Downloads/veltkamp.pdf:pdf;:home/t.kuipers/Downloads/2004{\_}Book{\_}AlgorithmsESA2004.pdf:pdf},
isbn = {3540249796},
number = {3},
organization = {Springer},
pages = {809--821},
title = {{A straight skeleton approximating the medial axis}},
COMMENTEDurl = {http://scholar.google.com/scholar?hl=en{\&}btnG=Search{\&}q=intitle:Lecture+Notes+in+Computer+Science{\#}2},
volume = {9},
year = {2004}
}
@article{Tang2017,
abstract = {Lattice structures with different desired physical properties are promising for a broad spectrum of applications. The availability of additive manufacturing (AM) technology has relaxed the fabricating limitation of lattice structures. However, manufacturing constraints still exist for AM-fabricated lattice structures, which have a significant influence on the printing quality and mechanical properties of lattice struts. In this paper, a design and optimization strategy is proposed for lattice structures with the consideration of manufacturability to ensure desired printing quality. The concept of manufacturable element is used to link the design and manufacturing process. A meta-model is constructed by experiments and the artificial neural network to obtain the manufacturing constraints. Sizes of struts are optimized by a bidirectional evolutionary structural optimization-based algorithm with these manufacturing constraints. An arm of quadcopter is redesigned and optimized to validate the proposed method. Its result shows that optimized heterogeneous lattice structures can improve the stiffness of the model compared to the homogeneous lattice structure and the original design. Both the Von-Mises stress and the maximum displacement are reduced without increasing the weight of designed part. And by considering the manufacturability constraints, the optimized design has been successfully fabricated by the selected additive manufacturing process.},
author = {Tang, Yunlong and Dong, Guoying and Zhou, Qinxue and Zhao, Yaoyao Fiona},
doi = {10.1109/TASE.2017.2685643},
file = {:home/t.kuipers/Downloads/07913670.pdf:pdf},
isbn = {15455955 (COMMENTEDissn)},
COMMENTEDissn = {15455955},
journal = {IEEE Transactions on Automation Science and Engineering},
number = {4},
pages = {1546--1562},
publisher = {IEEE},
title = {{Lattice Structure Design and Optimization With Additive Manufacturing Constraints}},
volume = {15},
year = {2017}
}
@article{thirkell2003continuous,
author = {Thirkell, Paul and Hoskins, Stephen},
journal = {Unknown medium},
publisher = {Institute of Physics},
title = {{Continuous Tone Digital Output, Using Archivally Proven Printing Methods and Materials}},
year = {2003}
}
@article{Tricard2019,
author = {Tricard, Thibault and Claux, Fr{\'{e}}d{\'{e}}ric and Lefebvre, Sylvain and Tricard, Thibault and Claux, Fr{\'{e}}d{\'{e}}ric and Lefebvre, Sylvain},
file = {:home/t.kuipers/Downloads/ribbed{\_}supports.pdf:pdf},
title = {{Ribbed support vaults for 3D printing of hollowed objects To cite this version : HAL Id : hal-02155929 Ribbed support vaults for 3D printing of hollowed objects}},
year = {2019}
}
@article{tronvoll2019investigating,
  title={Investigating pressure advance algorithms for filament-based melt extrusion additive manufacturing: theory, practice and simulations},
  author={Tronvoll, Sigmund Arnts{\o}nn and Popp, Sebastian and Elverum, Christer Westum and Welo, Torgeir},
  journal={Rapid Prototyping Journal},
  year={2019},
  publisher={Emerald Publishing Limited},
COMMENTEDauthor={Arnts{\o}nn, Tronvoll Sigmund},
month={Jan},
day={01},
publisher={Emerald Publishing Limited},
volume={25},
number={5},
pages={830-839},
COMMENTEDissn={1355-2546},
doi={10.1108/RPJ-10-2018-0275},
COMMENTEDurl={https://doi.org/10.1108/RPJ-10-2018-0275}
}
@article{Tymms2018,
author = {Tymms, Chelsea},
doi = {10.1145/3186267},
file = {:home/t.kuipers/Downloads/a168-tymms.pdf:pdf},
COMMENTEDissn = {07300301},
number = {1},
title = {{A Quantitative Perceptual Model for Tactile Roughness}},
volume = {1},
year = {2018}
}
@techreport{ultimaker2018tpu,
author = {Ultimaker},
file = {:home/t.kuipers/Downloads/UM180821 TDS TPU 95A RB V10.pdf:pdf},
pages = {1--3},
title = {{Technical data sheet TPU 95A}},
COMMENTEDurl = {https://ultimaker.com/download/74605/UM180821 TDS TPU 95A RB V10.pdf},
year = {2018}
}
@article{Umetani2013,
abstract = {We propose a novel cross-sectional structural analysis technique that efficiently detects critical stress inside a 3D object. We slice the object into cross-sections and compute stress based on bending momentum equilibrium. Unlike traditional approaches based on finite element methods, our method does not require a volumetric mesh or solution of linear systems, enabling interactive analysis speed. Based on the stress analysis, the orientation of an object is optimized to increase mechanical strength when manufactured with 3D printing. CR},
author = {Umetani, Nobuyuki and Schmidt, Ryan},
doi = {10.1145/2542355.2542361},
file = {:home/t.kuipers/Downloads/10.1.1.638.9434.pdf:pdf},
keywords = {3d printing,optimization,structural analysis,structural analysis, optimization, 3D printing},
pages = {1--4},
title = {{Cross-sectional structural analysis for 3D printing optimization}},
year = {2013}
}
@article{Vaezi2013,
abstract = {Interest in multifunctional structures made automatically from multiple materials poses a challenge for today's additive manufacturing (AM) technologies; however the ability to process multiple materials is a fundamental advantage to some AM technologies. The capability to fabricate multiple material parts can improve AM technologies by either optimizing the mechanical properties of the parts or providing additional functions to the final parts. The objective of this paper is to give an overview on the current state of the art of multiple materials AM technologies and their practical applications. In this paper, multiple material AM processes have been classified and the principles of the key processes have been reviewed comprehensively. The advantages and disadvantages of each process, recent progress, challenging technological obstacles, the possible strategies to overcome these barriers, and future trends are also discussed.},
author = {Vaezi, Mohammad and Chianrabutra, Srisit and Mellor, Brian and Yang, Shoufeng},
doi = {10.1080/17452759.2013.778175},
file = {:home/t.kuipers/Downloads/MultiplematerialadditivemanufacturingPart1areview.pdf:pdf},
isbn = {1745-2759},
COMMENTEDissn = {17452759},
journal = {Virtual and Physical Prototyping},
keywords = {3D printing,additive manufacturing,multiple material additive manufacturing,multiple material objects,rapid prototyping},
number = {1},
pages = {19--50},
title = {{Multiple material additive manufacturing - Part 1: A review: This review paper covers a decade of research on multiple material additive manufacturing technologies which can produce complex geometry parts with different materials}},
volume = {8},
year = {2013}
}
@inproceedings{ISI:000387592400080,
annote = {44th North American Manufacturing Research Conference (NAMRC),
Blacksburg, VA, JUN 27-JUL 01, 2016},
author = {Vaidya, Rohan and Anand, Sam},
booktitle = {44TH NORTH AMERICAN MANUFACTURING RESEARCH CONFERENCE, NAMRC 44},
doi = {10.1016/j.promfg.2016.08.072},
editor = {{Shih, A and Wang, L}},
COMMENTEDissn = {2351-9789},
pages = {1043--1059},
series = {Procedia Manufacturing},
title = {{Optimum Support Structure Generation for Additive Manufacturing using Unit Cell Structures and Support Removal Constraint}},
volume = {5},
year = {2016}
}
@article{VanManen2017,
abstract = {{\textless}p{\textgreater}Fused deposition modeling (FDM) enables simultaneous programming and production of thermo-responsive shape-shifting materials.{\textless}/p{\textgreater}},
author = {van Manen, Teunis and Janbaz, Shahram and Zadpoor, Amir A.},
doi = {10.1039/C7MH00269F},
file = {:home/t.kuipers/Downloads/c7mh00269f.pdf:pdf},
COMMENTEDissn = {2051-6347},
journal = {Mater. Horiz.},
number = {6},
pages = {1064--1069},
publisher = {Royal Society of Chemistry},
title = {{Programming 2D/3D shape-shifting with hobbyist 3D printers}},
COMMENTEDurl = {http://xlink.rsc.org/?DOI=C7MH00269F},
volume = {4},
year = {2017}
}
@article{Vanek2014,
abstract = {We propose an optimization framework for 3D printing that seeks to save printing time and the support material required to print 3D shapes. Three-dimensional printing technology is rapidly maturing and may revolutionize how we manufacture objects. The total cost of printing, however, is governed by numerous factors which include not only the price of the printer but also the amount of material and time to fabricate the shape. Our PackMerger framework converts the input 3D watertight mesh into a shell by hollowing its inner parts. The shell is then divided into segments. The location of splits is controlled based on several parameters, including the size of the connection areas or volume of each segment. The pieces are then tightly packed using optimization. The optimization attempts to minimize the amount of support material and the bounding box volume of the packed segments while keeping the number of segments minimal. The final packed configuration can be printed with substantial time and material savings, while also allowing printing of objects that would not fit into the printer volume. We have tested our system on three different printers and it shows a reduction of 5-30{\%} of the printing time while simultaneously saving 15-65{\%} of the support material. The optimization time was approximately 1 min. Once the segments are printed, they need to be assembled.},
author = {Vanek, J. and Galicia, J. A.Garcia and Benes, B. and M{\v{e}}ch, R. and Carr, N. and Stava, O. and Miller, G. S.},
doi = {10.1111/cgf.12353},
file = {:home/t.kuipers/Downloads/cgf.12353.pdf:pdf},
isbn = {0167-7055},
COMMENTEDissn = {14678659},
journal = {Computer Graphics Forum},
keywords = {Computational Geometry Modeling,Digital Geometry Processing,Geometric Modeling},
number = {6},
pages = {322--332},
title = {{PackMerger: A 3D print volume optimizer}},
volume = {33},
year = {2014}
}
@inproceedings{vanek2014clever,
author = {Vanek, Juraj and Galicia, Jorge A G and Benes, Bedrich},
booktitle = {Computer graphics forum},
number = {5},
organization = {Wiley Online Library},
pages = {117--125},
title = {{Clever support: Efficient support structure generation for digital fabrication}},
volume = {33},
year = {2014}
}
@article{vatti1992generic,
author = {Vatti, Bala R},
journal = {Communications of the ACM},
number = {7},
pages = {56--63},
publisher = {ACM},
title = {{A generic solution to polygon clipping}},
volume = {35},
year = {1992}
}
@article{VelhoDigitalHalftoning,
abstract = {This paper introduces a new digital halftoning technique that uses$\backslash$nspace filling curves to generate aperiodic patterns of clustered$\backslash$ndots. This method allows the parameterization of the size of pixel$\backslash$nclusters. which can vary in one pixel steps. The algorithm unities,$\backslash$nin this way, the dispersed and clustered-dot dithering techniques.},
address = {New York, NY, USA},
author = {Velho, Luiz and Gomes, Jonas de Miranda},
doi = {10.1145/127719.122727},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Velho, Gomes - 1991 - Digital Halftoning with Space Filling Curves.pdf:pdf},
isbn = {0897914368},
COMMENTEDissn = {00978930},
journal = {ACM SIGGRAPH Computer Graphics},
keywords = {bilevel display,digital halftoning,dithering,quantization,space filling curves},
month = {jul},
number = {4},
pages = {81--90},
publisher = {ACM},
title = {{Digital halftoning with space filling curves}},
COMMENTEDurl = {http://portal.acm.org/citation.cfm?doid=127719.122727},
volume = {25},
year = {1991}
}
@article{Vidim2013,
abstract = {3D printing hardware is rapidly scaling up to output continuous mixtures of multiple materials at increasing resolution over ever larger print volumes. This poses an enormous computational chal- lenge: large high-resolution prints comprise trillions of voxels and petabytes of data and simply modeling and describing the input with spatially varying material mixtures at this scale is challeng- ing. Existing 3D printing software is insufficient; in particular, most software is designed to support only a few million primitives, with discrete material choices per object. We present OpenFab, a programmable pipeline for synthesis of multi-material 3D printed objects that is inspired by RenderMan and modern GPU pipelines. The pipeline supports procedural evaluation of geometric detail and material composition, using shader-like fablets, allowing models to be specified easily and efficiently. We describe a streaming archi- tecture for OpenFab; only a small fraction of the final volume is stored in memory and output is fed to the printer with little startup delay. We demonstrate it on a variety of multi-material objects. CR},
author = {Vidim, Kiril and Wang, Szu-Po and Ragan-kelley, Jonathan},
isbn = {0730-0301},
COMMENTEDissn = {0730-0301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,3d printing,API,api,fabrication,materials},
number = {4},
pages = {1--11},
title = {{OpenFab: A Programmable Pipeline for Multi-Material Fabrication}},
volume = {32},
year = {2013}
}
@article{Vidimce2016,
abstract = {We demonstrate a new approach for designing functional mate- rial definitions for multi-material fabrication using our system called Foundry. Foundry provides an interactive and visual process for hierarchically designing spatially-varying material properties (e.g., appearance, mechanical, optical). The result- ing meta-materials exhibit structure at the micro and macro level and can surpass the qualities of traditional composites. The material definitions are created by composing a set of operators into an operator graph. Each operator performs a volume decomposition operation, remaps space, or constructs and assigns a material composition. The operators are imple- mented using a domain-specific language for multi-material fabrication; users can easily extend the library by writing their own operators. Foundry can be used to build operator graphs that describe complex, parameterized, resolution-independent, and reusable material definitions. We also describe how to stage the evaluation of the final material definition which in conjunction with progressive refinement, allows for interac- tive material evaluation even for complex designs. We show sophisticated and functional parts designed with our system.},
author = {Vidimce, Kiril and Kaspar, Alexandre and Wang, Ye and Matusik, Wojciech},
doi = {10.1145/2984511.2984516},
file = {:home/t.kuipers/Downloads/p563-vidimce.pdf:pdf},
isbn = {9781450341899},
journal = {Proceedings of the 29th Annual Symposium on User Interface Software and Technology - UIST '16},
pages = {12},
title = {{Foundry : Hierarchical Material Design for Multi-Material Fabrication}},
year = {2016}
}
@misc{walter2016,
annote = {(accessed April, 2017)},
author = {Walter, Moritz},
publisher = {Hackaday},
title = {{3D Printering: Non-Planar Layer FDM}},
COMMENTEDurl = {http://hackaday.com/2016/07/27/3d-printering-non-planar-layer-fdm/},
year = {2016}
}
@article{ISI:000243981300004,
author = {Wang, Charlie C L},
doi = {10.1016/j.cad.2006.09.003},
COMMENTEDissn = {0010-4485},
journal = {COMPUTER-AIDED DESIGN},
month = {jan},
number = {1},
pages = {35--50},
title = {{Direct extraction of surface meshes from implicitly represented heterogeneous volumes}},
volume = {39},
year = {2007}
}
@article{Wang2015,
abstract = {Metamaterials are inherently advantageous in achieving designable auxeticity since their Poisson' ratios are determined by the geometry of their unit cells. A family of auxetic metamaterials was created by computer-aided design (CAD) and dual-material three-dimensional (3D) printing. The effects of material selections and stiff material fraction on the Poisson's ratio, equivalent Young's Modulus, and maximum volume reduction were investigated. The results from finite element analysis (FEA) and mechanical testing indicated that the auxeticity and mechanical properties of this dual-material auxetic metamaterial (DMAM) are distinctly different from those of traditional single-material auxetic metamaterials (SMAMs). The interesting properties of DMAMs could be valuable to various engineering applications such as smart materials, biomedical components, and shock-resistant components.},
author = {Wang, Kan and Chang, Yung Hang and Chen, Yi Wen and Zhang, Chuck and Wang, Ben},
doi = {10.1016/j.matdes.2014.11.033},
file = {:home/t.kuipers/Downloads/1-s2.0-S0261306914009546-main.pdf:pdf},
isbn = {0261-3069},
COMMENTEDissn = {18734197},
journal = {Materials and Design},
pages = {159--164},
publisher = {Elsevier},
title = {{Designable dual-material auxetic metamaterials using three-dimensional printing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.matdes.2014.11.033},
volume = {67},
year = {2015}
}
@inproceedings{wang2015saliency,
author = {Wang, Weiming and Chao, Haiyuan and Tong, Jing and Yang, Zhouwang and Tong, Xin and Li, Hang and Liu, Xiuping and Liu, Ligang},
booktitle = {Computer Graphics Forum},
number = {6},
organization = {Wiley Online Library},
pages = {148--160},
title = {{Saliency-Preserving Slicing Optimization for Effective 3D Printing}},
volume = {34},
year = {2015}
}
@article{wang2018,
author = {Wang, Weiming and Wang, Tuanfeng Y. and Yang, Zhouwang and Liu, Ligang and Tong, Xin and Tong, Weihua and Deng, Jiansong and Chen, Falai and Liu, Xiuping},
doi = {10.1145/2508363.2508382},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Wang et al. - 2013 - Cost-effective printing of 3D objects with skin-frame structures.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {3D printing,fabrication,frame structure,sparsity optimization},
month = {nov},
number = {6},
pages = {1--10},
publisher = {ACM},
title = {{Cost-effective printing of 3D objects with skin-frame structures}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2508363.2508382},
volume = {32},
year = {2013}
}
@article{ISI:000371651700011,
author = {Wang, Xiaojian and Xu, Shanqing and Zhou, Shiwei and Xu, Wei and Leary, Martin and Choong, Peter and Qian, M and Brandt, Milan and Xie, Yi Min},
doi = {10.1016/j.biomaterials.2016.01.012},
COMMENTEDissn = {0142-9612},
journal = {BIOMATERIALS},
month = {mar},
pages = {127--141},
title = {{Topological design and additive manufacturing of porous metals for bone scaffolds and orthopaedic implants: A review}},
volume = {83},
year = {2016}
}
@article{Wang2018,
abstract = {This paper presents a level set-based topology optimization method considering the overhang constraint in additive manufacturing (AM) processes. Though the combination of the topology optimization and AM shows a promising potential and high design flexibility, there are still certain limitations. The overhang constraint is one of the major issues that need to be considered in the design stage. It requires the inclination angles of structural downward-facing surfaces to be larger than a given lower bound, so as to prevent the structure from warping or collapsing during the AM process. We propose a new form of overhang constraint in the level set framework, which is expressed as a single domain integral instead of point-wise constraints. This domain integral form facilitates the detection of overhang constraint violation. The shape derivative of the overhang constraint is derived by using the signed distance property of the level set function. The proposed method is capable of dealing with constraints with different minimum overhang angles. Theoretically, it allows the optimization to proceed from an arbitrary structural layout, without the need to satisfy the overhang constraint in the initial design. Several numerical examples are given to show the validity and effectiveness of the proposed method. It is seen in these examples that the overhang constraint is satisfied mainly by adjusting the local shape of structural members violating the overhang constraint during the optimization process. Thus, the overhang angle constrained optimization can generate similar load paths as in conventional optimal designs in most cases, without significantly worsening the structural stiffness.},
author = {Wang, Yaguang and Gao, Jincheng and Kang, Zhan},
doi = {10.1016/j.cma.2018.04.040},
file = {:home/t.kuipers/Downloads/1-s2.0-S0045782518302251-main.pdf:pdf},
COMMENTEDissn = {00457825},
journal = {Computer Methods in Applied Mechanics and Engineering},
keywords = {,Additive manufacturing,Geometrical constraint,Level set,Overhang,Topology optimization},
pages = {591--614},
publisher = {Elsevier B.V.},
title = {{Level set-based topology optimization with overhang constraint: Towards support-free additive manufacturing}},
COMMENTEDurl = {https://doi.org/10.1016/j.cma.2018.04.040},
volume = {339},
year = {2018}
}
@article{Wang2017,
abstract = {This paper proposes a novel multiscale concurrent design method to provide insight into the optimal structural design based on micro-architectures, where both the spatially-varying microstructural configurations and their macroscopic distribution are optimized in an integrated manner. A shape metamorphosis technology is developed to interpolate a prototype microstructure (PM) to generate a family of graded microstructures (GMs) that are connectable to each other in a natural way since they present similar topological features and material distribution patterns at their edges. The concurrent design optimizes configuration of the PM at the microscopic level and coordinates the compatible generated GMs at the macroscopic level in a double-loop manner, which ensures a sufficiently large design space. Numerical examples demonstrate that, compared to the one-scale design strategy, i.e. the macrostructure topology optimization and the homogeneous microstructure design method, the proposed approach is able to produce remarkably improved optimized solutions. Furthermore, the obtained structures show good manufacturability to which the additive manufacturing technology is applicable without extensive post-modification.},
author = {Wang, Yiqiang and Chen, Feifei and Wang, Michael Yu},
doi = {10.1016/j.cma.2016.12.007},
file = {:home/t.kuipers/Downloads/wang2017.pdf:pdf},
COMMENTEDissn = {00457825},
journal = {Computer Methods in Applied Mechanics and Engineering},
keywords = {Concurrent design,Connectable microstructure,Graded microstructure,Shape interpolation,Topology optimization},
pages = {84--101},
publisher = {Elsevier},
title = {{Concurrent design with connectable graded microstructures}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cma.2016.12.007},
volume = {317},
year = {2017}
}
@article{ISI:000345858700065,
author = {Wang, Yiqiang and Luo, Zhen and Kang, Zhan and Zhang, Nong},
doi = {10.1016/j.cma.2014.11.002},
COMMENTEDissn = {0045-7825},
journal = {COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING},
month = {jan},
pages = {1570--1586},
title = {{A multi-material level set-based topology and shape optimization method}},
volume = {283},
year = {2015}
}
@article{Wang2016,
abstract = {? 2016, Springer-Verlag Berlin Heidelberg.This paper proposes a structure-material integrated design method in the framework of level sets. A two-scale optimization is performed, where not only is the structural configuration optimized, but the effective properties of the constituent material are also designed by optimizing the configuration of the periodically-arranged microstructures. In this way, the approach can simultaneously generate optimized material distribution patterns as well as optimized materials. Due to the fact that the level set method produces material-void solutions only, the obtained material is uniformly distributed over the material regions of the structure in a strict sense. Three numerical examples are presented to validate the proposed method. The obtained optimal solutions illustrate that whether to design material cells or to optimize structural configurations to achieve the best structural performance would be problem dependent, and thus further demonstrate the necessity and validity of the integrated design scheme.},
author = {Wang, Yiqiang and Wang, Michael Yu and Chen, Feifei},
doi = {10.1007/s00158-016-1430-5},
COMMENTEDissn = {16151488},
journal = {Structural and Multidisciplinary Optimization},
number = {5},
title = {{Structure-material integrated design by level sets}},
volume = {54},
year = {2016}
}
@article{Wang2018a,
abstract = {Additive manufacturing (AM) enables fabrication of multiscale cellular structures as a whole part, whose features can span several dimensional scales. Both the configurations and layout pattern of the cellular lattices have great impact on the overall performance of the lattice structure. In this paper, we propose a novel design method to optimize cellular lattice structures to be fabricated by AM. The method enables an optimized load-bearing solution through optimization of geometries of global structures and downscale mesostructures, as well as global distributions of spatially-varying graded mesostructures. A shape metamorphosis technology is incorporated to construct the graded mesostructures with essential interconnections. Experimental testing is undertaken to verify the superior stiffness properties of the optimized graded lattice structure compared to the baseline design with uniform mesostructures.},
author = {Wang, Yiqiang and Zhang, Lei and Daynes, Stephen and Zhang, Hongying and Feih, Stefanie and Wang, Michael Yu},
doi = {10.1016/j.matdes.2018.01.011},
file = {:home/t.kuipers/Downloads/1-s2.0-S026412751830011X-main.pdf:pdf},
COMMENTEDissn = {18734197},
journal = {Materials and Design},
keywords = {Additive manufacturing,Graded lattice,Lattice structure,Level set method,Topology optimization},
pages = {114--123},
publisher = {Elsevier},
title = {{Design of graded lattice structure with optimized mesostructures for additive manufacturing}},
COMMENTEDurl = {https://doi.org/10.1016/j.matdes.2018.01.011},
volume = {142},
year = {2018}
}
@inproceedings{ISI:000088256800011,
abstract = {Previous investigations have shown that the optimization of extrusion dynamics in conjunction with the buildstyle pattern is of paramount importance to increase part quality in Fused Deposition Modeling (FDM). Recently domain decomposition and space filling curves have been introduced for slice generation in FDM [1]. The current work focuses on the implementations of fractal-like buildstyle patterns using Simulated Annealing [2, 3], Lin-Kernighan algorithms [4] and Construction Procedures based on Nearest Neighbor Heuristics [5]. These computational optimization procedures are able to generate filling patterns that allow the continuous deposition of a single road to fill arbitrary shaped domains. The necessary software modules to produce arbitrary three-dimensional artifacts have been developed and are evaluated with respect to part quality and build time.},
annote = {10th Solid Freeform Fabrication Symposium (SFF), UNIV TEXAS, AUSTIN, TX,
AUG 09-11, 1999},
author = {Wasser, T and Jayal, a D and Pistor, C},
booktitle = {Solid Freeform Fabrication Proceedings, August 1999},
editor = {{Bourell, DL and Beaman, JJ and Crawford, RH and Marcus, HL and Barlow, JW}},
isbn = {1053-2153$\backslash$n*************},
COMMENTEDissn = {1053-2153},
pages = {95--102},
series = {SOLID FREEFORM FABRICATION PROCEEDINGS (SERIES)},
title = {{Implementation and evaluation of novel buildstyles in Fused Deposition Modeling (FDM)}},
year = {1999}
}
@inproceedings{ISI:000390837100026,
abstract = {{\textcopyright} Springer International Publishing Switzerland 2017.This paper is focused on finding the efficient path generating algorithms. These algorithms can take part in the path planning process, which is the last stage in model processing for 3D printing. The paper provides the comparative analysis of the five implemented path generating algorithms, which are based on four strategies: ZigZag strategy, Contour strategy, Spiral Strategy, and Fractal strategy. The analysis is based on the results of experiments made with the designed and implemented experimentation system. The system allows carrying out two types of experiments: simulation experiments and physical one. The simulation experiment is performed with the programming application written in C{\#}. The physical experiments utilized FDM technology for 3D printing. Basing on the obtained results, we can conclude that the algorithm based on the ZigZag strategy seems to be better than the algorithms based on other approaches.},
annote = {International Conference on Digital Human Modeling and Simulation, FL,
JUL 27-31, 2016},
author = {Wojcik, Mateusz and Pozniak-Koszalka, Iwona and Koszalka, Leszek and Kasprzak, Andrzej},
booktitle = {Advances in Intelligent Systems and Computing},
doi = {10.1007/978-3-319-41627-4_26},
editor = {{Duffy, VG}},
isbn = {9783319416267},
COMMENTEDissn = {21945357},
keywords = {3D printing,Algorithm,Experimentation system,Optimization,Path generating},
pages = {291--302},
series = {Advances in Intelligent Systems and Computing},
title = {{Experimentation system for path planning applied to 3D printing}},
volume = {481},
year = {2017}
}
@article{Wu2019,
archivePrefix = {arXiv},
arxivId = {arXiv:1712.04523v1},
author = {Wu, Jun},
COMMENTEDeprint = {arXiv:1712.04523v1},
file = {:home/t.kuipers/Downloads/refine.pdf:pdf},
number = {March},
title = {{To Refine or Not to Refine : Topology Optimization of Adaptively Refined Infill To Refine or Not to Refine : Topology Optimization of Adaptively}},
year = {2019}
}
@article{Wu2018,
abstract = {We present a novel continuous optimization method to the discrete problem of quadtree optimization. The optimization aims at achieving a quadtree structure with the highest mechanical stiffness, where the edges in the quadtree are interpreted as structural elements carrying mechanical loads. We formulate quadtree optimization as a continuous material distribution problem. The discrete design variables (i.e., to refine or not to refine) are replaced by continuous variables on multiple levels in the quadtree hierarchy. In discrete quadtree optimization, a cell is only eligible for refinement if its parent cell has been refined. We propose a continuous analogue to this dependency for continuous multi-level design variables, and integrate it in the iterative optimization process. Our results show that the continuously optimized quadtree structures perform much stiffer than uniform patterns and the heuristically optimized counterparts. We demonstrate the use of adaptive structures as lightweight infill for 3D printed parts, where uniform geometric patterns have been typically used in practice.},
archivePrefix = {arXiv},
arxivId = {1712.04523},
author = {Wu, Jun},
doi = {10.1016/j.cad.2018.04.008},
COMMENTEDeprint = {1712.04523},
file = {:home/t.kuipers/Downloads/1-s2.0-S001044851830215X-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
keywords = {,Adaptive structures,Quadtree optimization,Topology optimization},
pages = {72--82},
publisher = {Elsevier},
title = {{Continuous optimization of adaptive quadtree structures}},
COMMENTEDurl = {https://doi.org/10.1016/j.cad.2018.04.008},
volume = {102},
year = {2018}
}
@article{wu2017infill,
author={J. {Wu} and N. {Aage} and R. {Westermann} and O. {Sigmund}},
journal={IEEE Transactions on Visualization and Computer Graphics},
title={Infill Optimization for Additive Manufacturing -- Approaching Bone-Like Porous Structures},
year={2018},
volume={24},
number={2},
pages={1127-1140},
keywords={optimisation;porous materials;topology;trabecular bone;voxel-wise topology optimization;sparse yet stable structures;per-voxel constraints;efficient optimization process;high-resolution topology optimization framework;optimized structures;mechanical properties;porous structures;additive manufacturing-approaching bone-like porous structures;Optimization;Bones;Topology;Solids;Three-dimensional printing;Shape;Mechanical factors;Infill;additive manufacturing;trabecular bone;porous structures;topology optimization},
doi={10.1109/TVCG.2017.2655523},
COMMENTEDissn={1077-2626},
month={Feb}
}
@article{Wu2017a,
abstract = {Additively manufactured parts are often composed of two sub-structures, a solid shell forming their exterior and a porous infill occupying the interior. To account for this feature this paper presents a novel method for generating simultaneously optimized shell and infill in the context of minimum compliance topology optimization. Our method builds upon two recently developed approaches that extend density-based topology optimization: A coating approach to obtain an optimized shell that is filled uniformly with a prescribed porous base material, and an infill approach which generates optimized, non-uniform infill within a prescribed shell. To evolve the shell and infill concurrently, our formulation assigns two sets of design variables: One set defines the base and the coating, while the other set defines the infill structures. The resulting intermediate density distributions are unified by a material interpolation model into a physical density field, upon which the compliance is minimized. Enhanced by an adapted robust formulation for controlling the minimum length scale of the base, our method generates optimized shell–infill composites suitable for additive manufacturing. We demonstrate the effectiveness of the proposed method on numerical examples, and analyse the influence of different design specifications.},
author = {Wu, Jun and Clausen, Anders and Sigmund, Ole},
doi = {10.1016/j.cma.2017.08.018},
COMMENTEDissn = {00457825},
journal = {Computer Methods in Applied Mechanics and Engineering},
keywords = {,Additive manufacturing,Coating,Composite,Infill,Topology optimization,Two-scale structure},
pages = {358--375},
title = {{Minimum compliance topology optimization of shell–infill composites for additive manufacturing}},
volume = {326},
year = {2017}
}
@article{Wu2016,
abstract = {A key requirement in 3D fabrication is to generate objects with individual exterior shapes and their interior being optimized to application-specific force constraints and low material consumption. Accomplishing this task is challenging on desktop computers, due to the extreme model resolutions that are required to accurately predict the physical shape properties, requiring memory and computational capacities going beyond what is currently available. Moreover, fabrication-specific constraints need to be considered to enable printability. To address these challenges, we present a scalable system for generating 3D objects using topology optimization, which allows to efficiently evolve the topology of high-resolution solids towards printable and light-weight-high-resistance structures. To achieve this, the system is equipped with a high-performance GPU solver which can efficiently handle models comprising several millions of elements. A minimum thickness constraint is built into the optimization process to automatically enforce printability of the resulting shapes. We further shed light on the question how to incorporate geometric shape constraints, such as symmetry and pattern repetition, in the optimization process. We analyze the performance of the system and demonstrate its potential by a variety of different shapes such as interior structures within closed surfaces, exposed support structures, and surface models.},
author = {Wu, Jun and Dick, Christian and Westermann, Rudiger},
doi = {10.1109/TVCG.2015.2502588},
isbn = {1077-2626},
COMMENTEDissn = {10772626},
journal = {IEEE Transactions on Visualization and Computer Graphics},
keywords = {3D printing,Topology optimization,finite element analysis,multigrid},
number = {3},
pages = {1195--1208},
title = {{A System for High-Resolution Topology Optimization}},
volume = {22},
year = {2016}
}
@article{ISI:000319478400027,
abstract = {Composite finite elements (CFEs) based on a hexahedral discretization of
the simulation domain have recently shown their effectiveness in
physically based simulation of deformable bodies with changing topology.
In this paper we present an efficient collision detection method for CFE
simulation of cuts. Our method exploits the specific characteristics of
CFEs, i.e., the fact that the number of simulation degrees of freedom is
significantly reduced. We show that this feature not only leads to a
faster deformation simulation, but also enables a faster collision
detection. To address the non-conforming properties of geometric
composition and hexahedral discretization, we propose a topology-aware
interpolation approach for the computation of penetration depth. We show
that this approach leads to accurate collision detection on complex
boundaries. Our results demonstrate that by using our method cutting on
high-resolution deformable bodies including collision detection and
response can be performed at interactive rates.},
annote = {Computer Graphics International (CGI) Conference, Hanover, GERMANY, 2013},
author = {Wu, Jun and Dick, Christian and Westermann, Ruediger},
doi = {10.1007/s00371-013-0810-8},
COMMENTEDissn = {0178-2789},
journal = {VISUAL COMPUTER},
month = {jun},
number = {6-8},
pages = {739--749},
title = {{Efficient collision detection for composite finite element simulation of cuts in deformable bodies}},
volume = {29},
year = {2013}
}
@article{ISI:000379095700008,
abstract = {We present a novel method for the modeling and optimization of the
material distribution inside 3D shapes, such that their 3D printed
replicas satisfy prescribed constraints regarding mass properties. In
particular, we introduce an extension of ray -representation to shape
interior modeling, and prove this parametrization covers the optimal
interior regarding static and rotational stability criteria. This
compact formulation thoroughly reduces the number of design variables
compared to the general volumetric element-wise formulation. We
demonstrate the effectiveness of our reduced formulation for optimizing
shapes that stably float in liquids or spin around a prescribed axis.
(C) 2016 Elsevier Ltd. All rights reserved.},
annote = {Eurographics Symposium on Geometry Processing (SGP) / Symposium on Solid
and Physical Modeling (SPM) / Shape Modeling International (SMI)
Conference, Freie Univ Berlin, Berlin, GERMANY, JUN 20-24, 2016},
author = {Wu, Jun and Kramer, Lou and Westermann, Ruediger},
doi = {10.1016/j.cag.2016.05.003},
institution = {European Assoc Comp Graph; TU Berlin; Disney Res; Microsoft Res; Discretizat Geometry {\&} Dynam; Berlin Math Sch; Adobe; Geometry Factory; Einstein Ctr Math Berlin; Nvidia; ACM SIGGRAPH},
COMMENTEDissn = {0097-8493},
journal = {COMPUTERS {\&} GRAPHICS-UK},
month = {aug},
number = {SI},
pages = {66--72},
title = {{Shape interior modeling and mass property optimization using ray-reps}},
volume = {58},
year = {2016}
}
@article{wu2016selfsupporting,
abstract = {Recent work has demonstrated that the interior material layout of a 3D model can be designed to make a fabricated replica satisfy application-specific demands on its physical properties, such as resistance to external loads. A widely used practice to fabricate such models is by layer-based additive manufacturing (AM), which however suffers from the problem of adding and removing interior supporting structures. In this paper, we present a novel method for generating application-specific infill structures on rhombic cells so that the resultant structures can automatically satisfy manufacturing requirements on overhang-angle and wall-thickness. Additional supporting structures can be avoided entirely in our framework. To achieve this, we introduce the usage of an adaptive rhombic grid, which is built from an input surface model. Starting from the initial sparse set of rhombic cells, via numerical optimization techniques an objective function can be improved by adaptively subdividing the rhombic grid and thus adding more walls in cells. We demonstrate the effectiveness of our method for generating interior designs in the applications of improving mechanical stiffness and static stability.},
author = {Wu, Jun and Wang, Charlie C.L. L and Zhang, Xiaoting and Westermann, Ruediger R{\"{u}}diger},
doi = {10.1016/j.cad.2016.07.006},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448516300690-main.pdf:pdf},
isbn = {0010-4485},
COMMENTEDissn = {00104485},
journal = {Computer-aided Design},
keywords = {,Additive manufacturing,Geometric algorithm,Infill,Optimization,Self-supporting},
month = {nov},
pages = {32--42},
publisher = {Elsevier},
title = {{Self-supporting rhombic infill structures for additive manufacturing}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cad.2016.07.006},
volume = {80},
year = {2016}
}
@inproceedings{ISI:000307042500053,
abstract = {Rigid body contact with multiple regions is common in virtual
environments. The traditional penalty based haptic display treats
translational penetration depth at each contact region independently,
and hence causes the undesired effect of visual interpenetration since
it does not guarantee all geometrical constraints simultaneously. It may
also introduce force discontinuity due to the singularity of penetration
depth. To overcome these artifacts, we present a method based on the
concept of generalized penetration depth (GPD), which considers both
translation and rotation to separate two overlapping objects. The method
could be viewed as an extension of the classic god-object method from
Euclidean space to configuration space in which GPD is defined. We
demonstrate the method for 3-DoF rigid bodies using pre-computed contact
space. For 6-DoF rigid bodies where pre-computation is not feasible, we
propose an efficient method to approximate the local contact space based
on continuous collision detection and quadratic programming.},
annote = {4th International Conference on Intelligent Robotics and Applications
(ICIRA 2011), Aachen, GERMANY, DEC 06-08, 2011},
author = {Wu, Jun and Wang, Dangxiao and Zhang, Yuru},
booktitle={International Conference on Intelligent Robotics and Applications},
editor = {{Jeschke, S and Liu, H and Schilberg, D}},
file = {:home/t.kuipers/Downloads/2011-WuJun-{\_}Haptic{\_}Display{\_}of{\_}Rigid{\_}Body{\_}Contact{\_}Using{\_}Generalized{\_}Penetration{\_}Depth.pdf:pdf},
isbn = {978-3-642-25485-7},
COMMENTEDissn = {0302-9743},
number = {I},
pages = {532--541},
series = {Lecture Notes in Artificial Intelligence},
title = {{Haptic Display of Rigid Body Contact Using Generalized Penetration Depth}},
volume = {7101},
year = {2011}
}
@article{Wu2019a,
abstract = {Inspired by natural cellular materials such as trabecular bone, lattice structures have been developed as a new type of lightweight material. In this paper we present a novel method to design lattice structures that conform with both the principal stress directions and the boundary of the optimized shape. Our method consists of two major steps: the first optimizes concurrently the shape (including its topology) and the distribution of orthotropic lattice materials inside the shape to maximize stiffness under application-specific external loads; the second takes the optimized configuration (i.e. locally-defined orientation, porosity, and anisotropy) of lattice materials from the previous step, and extracts a globally consistent lattice structure by field-aligned parameterization. Our approach is robust and works for both 2D planar and 3D volumetric domains. Numerical results and physical verifications demonstrate remarkable structural properties of conforming lattice structures generated by our method.},
journal = {IEEE Transactions on Visualization and Computer Graphics},
archivePrefix = {arXiv},
arxivId = {1905.02902},
author = {Wu, Jun and Wang, Weiming and Gao, Xifeng},
COMMENTEDeprint = {1905.02902},
file = {:home/t.kuipers/Downloads/1905.02902.pdf:pdf},
pages = {1--14},
title = {{Design and Optimization of Conforming Lattice Structures}},
url = {http://arxiv.org/abs/1905.02902},
year = {2019}
}
@article{ISI:000362978000013,
abstract = {Virtual cutting of deformable bodies has been an important and active
research topic in physically based modelling and simulation for more
than a decade. A particular challenge in virtual cutting is the robust
and efficient incorporation of cuts into an accurate computational model
that is used for the simulation of the deformable body. This report
presents a coherent summary of the state of the art in virtual cutting
of deformable bodies, focusing on the distinct geometrical and
topological representations of the deformable body, as well as the
specific numerical discretizations of the governing equations of motion.
In particular, we discuss virtual cutting based on tetrahedral,
hexahedral and polyhedral meshes, in combination with standard,
polyhedral, composite and extended finite element discretizations. A
separate section is devoted to meshfree methods. Furthermore, we discuss
cutting-related research problems such as collision detection and haptic
rendering in the context of interactive cutting scenarios. The report is
complemented with an application study to assess the performance of
virtual cutting simulators.},
author = {Wu, Jun and Westermann, Ruediger and Dick, Christian},
doi = {10.1111/cgf.12528},
COMMENTEDissn = {0167-7055},
journal = {COMPUTER GRAPHICS FORUM},
month = {sep},
number = {6},
pages = {161--187},
title = {{Survey of Physically Based Simulation of Cuts in Deformable Bodies}},
volume = {34},
year = {2015}
}
@article{Wulle2017,
abstract = {Additive Manufacturing (AM) technologies require innovative design paradigms and guidelines that exhaust the offered freedoms in geometry and material. The aim of the Design for Additive Manufacturing is to provide design opportunities and to enhance workpiece properties taking into account constraints of the process, e.g. kinematics and limitations of print technology. Most AM applications are constrained to three-axis movements limiting the fabrication of workpieces layer by layer to one fixed building direction only. This causes limitations of strength properties, surface quality and the need of supporting structures. Multi-axis AM enables completely new design possibilities going beyond current optimization and design strategies of conventional AM workpieces. This innovation requires multiple design and manufacturing changes in the internal and external geometry of the workpiece as well as in machine and printing head technology. This paper identifies the requirements and capabilities of multi-axis AM and presents possible solutions to overcome the identified challenges. Preliminary results for multi-axis AM are described on an exemplary workpiece.},
author = {Wulle, Frederik and Coupek, Daniel and Sch{\"{a}}ffner, Florian and Verl, Alexander and Oberhofer, Felix and Maier, Thomas},
doi = {10.1016/j.procir.2017.01.046},
file = {:home/t.kuipers/Downloads/1-s2.0-S2212827117300471-main.pdf:pdf},
isbn = {2212-8271},
COMMENTEDissn = {22128271},
journal = {Procedia CIRP},
keywords = {Additive Manufacturing,Design optimization,Machine tool,Polymer},
pages = {229--234},
publisher = {Elsevier B.V.},
title = {{Workpiece and Machine Design in Additive Manufacturing for Multi-Axis Fused Deposition Modeling}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.procir.2017.01.046},
volume = {60},
year = {2017}
}
@article{Xiao2018,
abstract = {Selective laser melting (SLM) technology can manufacture complex lattice structures, which effectively reduces the manufacturing constraint and significantly increases the design freedom for lattice structure. In this study, additive manufacturing and topology optimization are combined for designing Face Centre Cube (FCC), Vertex Cube (VC), and Edge Centre Cube (ECC) structures, which are manufactured via SLM technology. Mechanical performance is evaluated, and a Gibson-Ashby model is developed to predict the performance of the three structures including different levels of porosity. The results show that FCC and VC lattice structures have better mechanical behaviour compared with that of the ECC lattice structure; however, their energy absorption efficiency is inferior to that of the ECC lattice structure. Comparisons between various SLM built lattice structures made from 316L stainless steel prove that the performance of topology-optimized lattice structures is superior to the majority of lattice structures. This result verifies the feasibility of lattice structure unit selection via topology optimization technology. Various work conditions are simulated for topology optimization to obtain a lightweight lattice structure with optimal performance under specific conditions.},
author = {Xiao, Zefeng and Yang, Yongqiang and Xiao, Ran and Bai, Yuchao and Song, Changhui and Wang, Di},
doi = {10.1016/j.matdes.2018.01.023},
file = {:home/t.kuipers/Downloads/1-s2.0-S0264127518300303-main.pdf:pdf},
COMMENTEDissn = {18734197},
journal = {Materials and Design},
keywords = {Lattice structures,Mechanical characterization,Selective laser melting,Topology optimization},
pages = {27--37},
publisher = {Elsevier},
title = {{Evaluation of topology-optimized lattice structures manufactured via selective laser melting}},
COMMENTEDurl = {https://doi.org/10.1016/j.matdes.2018.01.023},
volume = {143},
year = {2018}
}
@article{Xu2017,
abstract = {Purpose - The purpose of this paper is to develop a general mathematic approach to model the microstructures of porous structures produced by additive manufacturing (AM), which will result in fractal surface topography and higher roughness that have greater influence on the performance of porous structures. Design/methodology/approach - The overall shapes of pores were modeled by triply periodic minimal surface (TPMS), and the micro-roughness details attached to the overall pore shapes were represented by Weierstrass-Mandelbrot (W-M) fractal representation, which was integrated with TPMS along its normal vectors. An index roughly reflecting the irregularity of fractal TPMS was proposed, based on which the influence of the fractal parameters on the fractal TPMS was qualitatively analyzed. Two complex samples of real porous structures were given to demonstrate the feasibility of the model. Findings - The fractal surface topography should not be neglected at a micro-scale level. In addition, a decrease in the fractal dimension Ds may exponentially make the topography rougher; an increase in the height-scaling parameter G may linearly increase the roughness; and the number of the superposed ridges has no distinct influence on the topography. Furthermore, the synthesis method is general for all implicit surfaces. Practical implications - The method provides an alternative way to shift the posteriori design paradigm of porous media to priori design mode through numeric simulation. Therefore, the optimization of AM process parameters, as well as the porous structure, can be potentially realized according to specific functional requirement. Originality/value - The synthesis of TPMS and W-M fractal geometry was accomplished efficiently and was general for all implicit freeform surfaces, and the influence of the fractal parameters on the fractal TPMS was analyzed more systematically. {\textcopyright} Emerald Publishing Limited.},
author = {Xu, Zhijia and Wang, Qinghui and Li, Jingrong},
doi = {10.1108/RPJ-09-2015-0121},
file = {:home/t.kuipers/Downloads/xu2017.pdf:pdf},
isbn = {1220150193},
COMMENTEDissn = {1355-2546},
journal = {Rapid Prototyping Journal},
number = {2},
pages = {257--272},
title = {{Modeling porous structures with fractal rough topography based on triply periodic minimal surface for additive manufacturing}},
COMMENTEDurl = {http://www.emeraldinsight.com/doi/10.1108/RPJ-09-2015-0121},
volume = {23},
year = {2017}
}
@misc{yamamoto2006producing,
annote = {US Patent 7,126,723},
author = {Yamamoto, Akio},
publisher = {Google Patents},
title = {{Producing engraving-style halftone images}},
year = {2006}
}
@article{Yan2019,
author = {Yan, Xin and Rao, Cong and Lu, Lin and Sharf, Andrei and Zhao, Haisen and Chen, Baoquan},
doi = {10.1109/TVCG.2019.2914044},
file = {:home/t.kuipers/Downloads/08703138.pdf:pdf},
COMMENTEDissn = {1077-2626},
journal = {IEEE Transactions on Visualization and Computer Graphics},
number = {Xx},
pages = {1--1},
title = {{Strong 3D Printing by TPMS Injection}},
COMMENTEDurl = {https://ieeexplore.ieee.org/document/8703138/},
volume = {XX},
year = {2019}
}
@inproceedings{ISI:000393000300020,
annote = {ASME International Design Engineering Technical Conferences and
Computers and Information in Engineering Conference (IDETC/CIE),
Charlotte, NC, AUG 21-24, 2016},
author = {Yang, Zhuo and Eddy, Douglas and Krishnamurty, Sundar and Grosse, Ian and Denno, Peter and Lopez, Felipe},
booktitle = {PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE, 2016, VOL 1A},
isbn = {978-0-7918-5007-7},
title = {{INVESTIGATING PREDICTIVE METAMODELING FOR ADDITIVE MANUFACTURING}},
year = {2016}
}
@article{Ying2018,
abstract = {Porous structures exist widely in both natural materials and our daily life. Thanks to the properties of being lightweight, sustainable and cost efficient, it has been applied to a great extent in material engineering, meanwhile achieving much attention in shape optimization for 3D printing. However, current efforts on modeling porous structures in a given shape either consider uniform pore distributions, or regard the physical constraints as an underlying scalar field, both generating pores in an isotropic manner. The limitation is that the intrinsic directional properties of some physical terms like stresses or elasticities are not considered. It is still challenging to adapt the porous structure with the input tensor field. In this paper, we present an algorithm for modeling anisotropic porous structure, based on anisotropic centroidal Voronoi tessellations and an iteratively optimization framework in a 2.5D domain. Comparisons with isotropic porous structures show that our anisotropic structures have better adaption with the stress tensor field and thus gain better strength-to-weight ratio for the 3D printed model.},
author = {Ying, Jianming and Lu, Lin and Tian, Lihao and Yan, Xin and Chen, Baoquan},
doi = {10.1016/j.cag.2017.07.008},
file = {:home/t.kuipers/Downloads/ying2017.pdf:pdf},
COMMENTEDissn = {00978493},
journal = {Computers and Graphics (Pergamon)},
keywords = {3D Printing,Anisotropic,Porous structure},
pages = {157--164},
publisher = {Elsevier Ltd},
title = {{Anisotropic porous structure modeling for 3D printed objects}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.cag.2017.07.008},
volume = {70},
year = {2018}
}
@article{Yoo2011,
abstract = {An effective method for the 3D porous scaffold design of human tissue is presented based on a hybrid method of distance field and triply periodic minimal surface (TPMS). By the creative application of traditional distance field algorithm into the Boolean operations of the anatomical model and TPMS-based unit cell library, an almost defects free porous scaffolds having the complicated micro-structure and high quality external surface faithful to a specific anatomic model can be easily obtained without the difficult and time-consuming trimming and re-meshing processes. After generating the distance fields for the given tissue model and required internal micro-structure, a series of simple modifications in distance fields enable us to obtain a complex porous scaffold. Experimental results show that the proposed scaffold design method has the potential to combine the perfectly interconnected pore networks based on the TPMS unit cell libraries and the given external geometry in a consistent framework irrespective of the complexity of the models. {\textcopyright} 2011 Elsevier Ltd.},
author = {Yoo, Dong J.},
doi = {10.1016/j.biomaterials.2011.07.019},
file = {:home/t.kuipers/Downloads/yoo2011.pdf:pdf},
isbn = {0142-9612},
COMMENTEDissn = {01429612},
journal = {Biomaterials},
keywords = {Distance field,Porous scaffold design,Tissue engineering,Triply periodic minimal surface},
number = {31},
pages = {7741--7754},
pmid = {21798592},
publisher = {Elsevier},
title = {{Porous scaffold design using the distance field and triply periodic minimal surface models}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.biomaterials.2011.07.019},
volume = {32},
year = {2011}
}
@article{ISI:000398267300005,
author = {Yu, Kai-Ming and Wang, Yu and Wang, Charlie C L},
doi = {10.1108/RPJ-06-2015-0067},
COMMENTEDissn = {1355-2546},
journal = {RAPID PROTOTYPING JOURNAL},
number = {1},
pages = {34--43},
title = {{Smooth geometry generation in additive manufacturing file format: problem study and new formulation}},
volume = {23},
year = {2017}
}
@article{YunhuiYangLibinZhaoDexuanQiMeijuanShan2019,
author = {{Yunhui Yang, Libin Zhao, Dexuan Qi, Meijuan Shan}, Jianyu Zhang},
doi = {10.1108/RPJ-10-2017-0212},
file = {:home/t.kuipers/Downloads/10.1108@RPJ-10-2017-0212.pdf:pdf},
isbn = {1020170212},
journal = {Rapid Prototyping Journal},
keywords = {fuzzy optimization},
title = {{A fuzzy optimization method for octet-truss lattices}},
year = {2019}
}
@misc{zcorp:2005,
author = {{Z Corporation}},
title = {{Z Corporation 3D Printing Technology - Fast, Affordable and Uniquely Versatile}},
COMMENTEDurl = {https://www.ucy.ac.cy/arch/documents/3d{\_}Printer{\_}Lab/3D{\_}Printing{\_}Technology.pdf},
year = {2005}
}
@article{Zegard2016,
abstract = {Topology optimization is a technique that allows for increasingly efficient designs with minimal a priori decisions. Because of the complexity and intricacy of the solutions obtained, topology optimization was often constrained to research and theoretical studies. Additive manufacturing, a rapidly evolving field, fills the gap between topology optimization and application. Additive manufacturing has minimal limitations on the shape and complexity of the design, and is currently evolving towards new materials, higher precision and larger build sizes. Two topology optimization methods are addressed: the ground structure method and density-based topology optimization. The results obtained from these topology optimization methods require some degree of post-processing before they can be manufactured. A simple procedure is described by which output suitable for additive manufacturing can be generated. In this process, some inherent issues of the optimization technique may be magnified resulting in an unfeasible or bad product. In addition, this work aims to address some of these issues and propose methodologies by which they may be alleviated. The proposed framework has applications in a number of fields, with specific examples given from the fields of health, architecture and engineering. In addition, the generated output allows for simple communication, editing, and combination of the results into more complex designs. For the specific case of three-dimensional density-based topology optimization, a tool suitable for result inspection and generation of additive manufacturing output is also provided.},
archivePrefix = {arXiv},
arxivId = {arXiv:1011.1669v3},
author = {Zegard, Tom??s Tomas Tom{\'{a}}s Tom??s and Paulino, Glaucio H.},
doi = {10.1007/s00158-015-1274-4},
COMMENTEDeprint = {arXiv:1011.1669v3},
isbn = {0015801512744},
COMMENTEDissn = {16151488},
journal = {Structural and Multidisciplinary Optimization},
keywords = {,Additive manufacturing,Density-based topology optimization,Ground structure method,Structural manufacturing,Three-dimensional optimal structures},
month = {jan},
number = {1},
pages = {175--192},
pmid = {25246403},
title = {{Bridging topology optimization and additive manufacturing}},
volume = {53},
year = {2016}
}
@article{Zeinalabedini2016,
abstract = {Exciting progress in additive manufacturing (AM) technology, which enables fabrication of cellular structures with highly complex lattices and pores, has stimulated the development of lightweight structural products with improved performance and increased functionality. However, conventional design and analysis tools lack the ability to optimize complex geometries efficiently and robustly. With this motivation, in this study, homogenized material models of open-cell polymeric foams with spherical cell architectures that are manufactured by using an AM technology are formulated through both experimental and numerical investigations, which in turn can be employed in a novel micromechanics based topology optimization algorithm developed for the optimization of cellular structures. In this regard, generating computer aided drawing (CAD) data, which is mandatory for AM, randomly intersected spherical ensemble method is employed. Several foam models with different porosities are generated, and utilized in nonlinear finite element analyses (FEAs) to determine constitutive elastic constants. Plastic stress-strain data for the bulk AM material are obtained through static tensile tests in a variety of different loading directions and these results used in FEA as true stress-strain data. Homogenization is performed based on a quadratic form of the widely used Gibson and Ashby foam model, which describes the Young's modulus E∗ and yield strength $\sigma$pl∗ of cellular structures in terms of relative density. Coefficients of the quadratic scaling laws are fitted by both FEA and experiments which are compared with each other.},
author = {Zeinalabedini, Hamed and Yildiz, Y. Onur and Zhang, Pu and Laux, Kevin and Kirca, Mesut and To, Albert C.},
doi = {10.1016/j.addma.2016.04.008},
file = {:home/t.kuipers/Downloads/Additive Manufacturing 12/Homogenization-of-additive-manufactured-polymeric-foams{\_}2016{\_}Additive-Manufa.pdf:pdf},
COMMENTEDissn = {22148604},
journal = {Additive Manufacturing},
keywords = {Cellular solids,Homogenization,Mechanical properties,Optimization},
pages = {274--281},
publisher = {Elsevier B.V.},
title = {{Homogenization of additive manufactured polymeric foams with spherical cells}},
COMMENTEDurl = {http://dx.doi.org/10.1016/j.addma.2016.04.008},
volume = {12},
year = {2016}
}
@article{Zhang2018a,
abstract = {Functionally graded materials (FGM) have recently attracted a lot of research attention in the wake of the recent prominence of additive manufacturing (AM) technology. The continuously varying spatial composition profile of two or more materials affords FGM object to simultaneously possess ideal properties of multiple different materials. Additionally, emerging technologies in AM domain enables one to make complex shapes with customized multifunctional material properties in an additive fashion, where laying down successive layers of material creates an object. In this paper, we focus on providing an overview of research at the intersection of AM techniques and FGM objects. We specifically discuss the FGM modeling representation schemes and outline a classification system to classify existing FGM representation methods. We also highlight the key aspects such as the part orientation, slicing, and path planning processes that are essential for fabricating a quality FGM object through the use of multi-material AM techniques.},
author = {Zhang, Binbin and Jaiswal, Prakhar and Rai, Rahul and Nelaturi, Saigopal},
doi = {10.1115/1.4039683},
file = {:home/t.kuipers/Downloads/zhang2018.pdf:pdf},
COMMENTEDissn = {1530-9827},
journal = {Journal of Computing and Information Science in Engineering},
number = {4},
pages = {041002},
title = {{Additive Manufacturing of Functionally Graded Material Objects: A Review}},
volume = {18},
year = {2018}
}
@article{Zhang2018,
author = {Zhang, Weihong and Zhou, Lu},
doi = {10.1016/j.cma.2018.01.037},
file = {:home/t.kuipers/Downloads/1-s2.0-S0045782518300392-main.pdf:pdf},
COMMENTEDissn = {0045-7825},
journal = {Comput. Methods Appl. Mech. Engrg.},
keywords = {,additive manufacturing,polygon feature,self-supporting,topology optimization,v-shaped area},
pages = {56--78},
publisher = {Elsevier B.V.},
title = {{ScienceDirect Topology optimization of self-supporting structures with polygon features for additive manufacturing}},
COMMENTEDurl = {https://doi.org/10.1016/j.cma.2018.01.037},
volume = {334},
year = {2018}
}
@article{ISI:000376076800007,
author = {Zhang, Weisheng and Yuan, Jie and Zhang, Jian and Guo, Xu},
doi = {10.1007/s00158-015-1372-3},
COMMENTEDissn = {1615-147X},
journal = {STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION},
month = {jun},
number = {6},
pages = {1243--1260},
title = {{A new topology optimization approach based on Moving Morphable Components (MMC) and the ersatz material model}},
volume = {53},
year = {2016}
}
@article{ISI:000363671200052,
annote = {ACM SIGGRAPH Asia Conference, Kobe, JAPAN, NOV 02-05, 2015},
author = {Zhang, Xiaoting and Le, Xinyi and Panotopoulou, Athina and Whiting, Emily and Wang, Charlie C L},
doi = {10.1145/2816795.2818121},
COMMENTEDissn = {0730-0301},
journal = {ACM Transactions on Graphics},
month = {nov},
number = {6},
title = {{Perceptual Models of Preference in 3D Printing Direction}},
volume = {34},
year = {2015}
}
@article{ISI:000383444500016,
annote = {Eurographics Symposium on Geometry Processing (SGP) / Symposium on Solid
and Physical Modeling (SPM) / Shape Modeling International (SMI)
Conference, Freie Univ Berlin, Berlin, GERMANY, JUN 20-24, 2016},
author = {Zhang, Xiaoting and Le, Xinyi and Wu, Zihao and Whiting, Emily and Wang, Charlie C L},
doi = {10.1111/cgf.12972},
file = {:home/t.kuipers/Downloads/cgf.12972.pdf:pdf},
COMMENTEDissn = {0167-7055},
journal = {COMPUTER GRAPHICS FORUM},
month = {aug},
number = {5},
pages = {157--166},
title = {{Data-Driven Bending Elasticity Design by Shell Thickness}},
volume = {35},
year = {2016}
}
@article{Zhang2019,
author = {Zhang, Yong and Zhao, Mingyong and Ye, Peiqing and Zhang, Hui},
doi = {10.1016/j.cad.2019.04.004},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448518301799-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
publisher = {Elsevier},
title = {{A G4 continuous B-spline transition algorithm for CNC machining with jerk-smooth feedrate scheduling along linear segments}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S0010448518301799},
year = {2019}
}
@article{Zhang2019,
author = {Zhang, Yong and Zhao, Mingyong and Ye, Peiqing and Zhang, Hui},
doi = {10.1016/j.cad.2019.04.004},
file = {:home/t.kuipers/Downloads/1-s2.0-S0010448518301799-main.pdf:pdf},
COMMENTEDissn = {00104485},
journal = {Computer-Aided Design},
publisher = {Elsevier},
title = {{A G4 continuous B-spline transition algorithm for CNC machining with jerk-smooth feedrate scheduling along linear segments}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S0010448518301799},
year = {2019}
}
@article{ISI:000388988300036,
author = {Zhang, Yunbo and Wang, Charlie C L and Ramani, Karthik},
doi = {10.1007/s00170-016-8669-2},
file = {:home/t.kuipers/Downloads/Zhang2016{\_}Article{\_}OptimalFittingOfStrain-control.pdf:pdf},
COMMENTEDissn = {0268-3768},
journal = {INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY},
month = {dec},
number = {9-12},
pages = {2873--2887},
title = {{Optimal fitting of strain-controlled flattenable mesh surfaces}},
volume = {87},
year = {2016}
}
@article{Zhao2016,
abstract = {We develop a new kind of “space-filling” curves, connected Fer- mat spirals, and show their compelling properties as a tool path fill pattern for layered fabrication. Unlike classical space-filling curves such as the Peano or Hilbert curves, which constantly wind and bind to preserve locality, connected Fermat spirals are formed mostly by long, low-curvature paths. This geometric property, along with continuity, influences the quality and efficiency of layered fabrica- tion. Given a connected 2D region, we first decompose it into a set of sub-regions, each of which can be filled with a single continuous Fermat spiral. We show that it is always possible to start and end a Fermat spiral fill at approximately the same location on the outer boundary of the filled region. This special property allows the Fer- mat spiral fills to be joined systematically along a graph traversal of the decomposed sub-regions. The result is a globally continuous curve. We demonstrate that printing 2D layers following tool paths as connected Fermat spirals leads to efficient and quality fabrica- tion, compared to conventional fill patterns.},
author = {Zhao, Haisen and Chen, Baoquan and Gu, Fanglin and Huang, Qi-Xing and Garcia, Jorge and Chen, Yong and Tu, Changhe and Benes, Bedrich and Zhang, Hao and Cohen-Or, Daniel},
doi = {10.1145/2897824.2925958},
file = {:home/t.kuipers/Downloads/zhao{\_}sig16{\_}fermat.pdf:pdf;:home/t.kuipers/Downloads/a100-zhao.pdf:pdf},
isbn = {9781450342797},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
keywords = {and surface models,computing methodologies,concepts,connected fermat spirals,continuous fill pattern,fabrication,layered,parametric curve,shape analysis,space-filling curve,tool path},
number = {4},
pages = {1--10},
title = {{Connected fermat spirals for layered fabrication}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2897824.2925958},
volume = {35},
year = {2016}
}
@article{Zheng2012,
author = {Zheng, Z M and Zhang, T Q},
file = {:home/t.kuipers/Downloads/50453.pdf:pdf},
journal = {School of Enviromental Sciences},
title = {{We are IntechOpen , the world ' s leading publisher of Open Access books Built by scientists , for scientists TOP 1 {\%}}},
year = {2012}
}
@article{Zheng2012,
author = {Zheng, Z.M and Zhang, T.Q},
file = {:home/t.kuipers/Downloads/50453.pdf:pdf},
journal = {School of Enviromental Sciences},
title = {{Advanced Design for Additive Manufacturing: 3D Slicing and 2D Path Planning}},
year = {2012}
}
@article{Zhou2014,
abstract = {Decorative patterns are observed in many forms of art, typically enriching the visual aspect of otherwise simple shapes. Such patterns are especially difficult to create, as they often exhibit intricate structural details and at the same time have to precisely match the size and shape of the underlying geometry. In the field of Computer Graphics, several approaches have been proposed to automatically synthesize a decorative pattern along a curve, from an example. This empowers non expert users with a simple brush metaphor, allowing them to easily paint complex structured decorations.

We extend this idea to the space of design and fabrication. The major challenge is to properly account for the topology of the produced patterns. In particular, our technique ensures that synthesized patterns will be made of exactly one connected component, so that once printed they form a single object. To achieve this goal we propose a two steps synthesis process, first synthesizing the topology of the pattern and later synthesizing its exact geometry. We introduce topology descriptors that efficiently capture the topology of the pattern synthesized so far.

We propose several applications of our method, from designing objects using synthesized patterns along curves and within rectangles, to the decoration of surfaces with a dedicated smooth frame interpolation. Using our technique, designers paint structured patterns that can be fabricated into solid, tangible objects, creating unusual and surprising designs of lamps, chairs and laces from examples.},
author = {Zhou, Shizhe and Jiang, Changyun and Lefebvre, Sylvain},
doi = {10.1145/2661229.2661238},
file = {:home/t.kuipers/.local/share/data/Mendeley Ltd./Mendeley Desktop/Downloaded/Zhou, Jiang, Lefebvre - 2014 - Topology-constrained synthesis of vector patterns.pdf:pdf},
COMMENTEDissn = {07300301},
journal = {ACM Transactions on Graphics},
month = {nov},
number = {6},
pages = {1--11},
title = {{Topology-constrained synthesis of vector patterns}},
COMMENTEDurl = {http://dl.acm.org/citation.cfm?doid=2661229.2661238},
volume = {33},
year = {2014}
}
@article{Zhu2017,
abstract = {In this paper we present a novel two-scale framework to optimize the structure and the material distribution of an object given its functional specifications. Our approach utilizes multi-material microstructures as low-level building blocks of the object. We start by precomputing the material property gamut -- the set of bulk material properties that can be achieved with all material microstructures of a given size. We represent the boundary of this material property gamut using a level set field. Next, we propose an efficient and general topology optimization algorithm that simultaneously computes an optimal object topology and spatially-varying material properties constrained by the precomputed gamut. Finally, we map the optimal spatially-varying material properties onto the microstructures with the corresponding properties in order to generate a high-resolution printable structure. We demonstrate the efficacy of our framework by designing, optimizing, and fabricating objects in different material property spaces on the level of a trillion voxels, i.e several orders of magnitude higher than what can be achieved with current systems.},
archivePrefix = {arXiv},
arxivId = {1706.03189},
author = {Zhu, Bo and Skouras, M{\'{e}}lina and Chen, Desai and Matusik, Wojciech},
doi = {10.1145/3095815},
COMMENTEDeprint = {1706.03189},
file = {:home/t.kuipers/Downloads/1706.03189.pdf:pdf},
isbn = {9781450335492},
COMMENTEDissn = {07300301},
pmid = {397311},
title = {{Two-Scale Topology Optimization with Microstructures}},
COMMENTEDurl = {http://arxiv.org/abs/1706.03189},
year = {2017}
}
@article{Zong2019,
author = {Zong, Hongming and Liu, Hui and Ma, Qingping and Tian, Ye and Zhou, Mingdong and Wang, Michael Yu},
doi = {10.1016/j.cma.2019.05.029},
file = {:home/t.kuipers/Downloads/1-s2.0-S0045782519302993-main.pdf:pdf},
COMMENTEDissn = {00457825},
journal = {Computer Methods in Applied Mechanics and Engineering},
publisher = {Elsevier B.V.},
title = {{VCUT level set method for topology optimization of functionally graded cellular structures}},
COMMENTEDurl = {https://linkinghub.elsevier.com/retrieve/pii/S0045782519302993},
year = {2019}
}

@article{Vatti2019clipping,
 author = {Vatti, Bala R.},
 title = {A Generic Solution to Polygon Clipping},
 journal = {Commun. ACM},
 issue_date = {July 1992},
 volume = {35},
 number = {7},
 month = jul,
 year = {1992},
 COMMENTEDissn = {0001-0782},
 pages = {56--63},
 numpages = {8},
 COMMENTEDurl = {http://doi.acm.org/10.1145/129902.129906},
 doi = {10.1145/129902.129906},
 acmid = {129906},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {connectivity coherence, contributing edge, contributing local minimum, difference, hidden surface, intersection, polygon clipping, scanbeam, spatial coherence, successor edge, trapezoids, unions, vertex classification},
} 
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