Relevant bibliographies by topics / Freeform 3d printing

Academic literature on the topic 'Freeform 3d printing'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Freeform 3d printing"

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Lee, Hyun, Tae-Sik Jang, Ginam Han, Hae-Won Kim, and Hyun-Do Jung. "Freeform 3D printing of vascularized tissues: Challenges and strategies." Journal of Tissue Engineering 12 (January 2021): 204173142110572. http://dx.doi.org/10.1177/20417314211057236.

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In recent years, freeform three-dimensional (3D) printing has led to significant advances in the fabrication of artificial tissues with vascularized structures. This technique utilizes a supporting matrix that holds the extruded printing ink and ensures shape maintenance of the printed 3D constructs within the prescribed spatial precision. Since the printing nozzle can be translated omnidirectionally within the supporting matrix, freeform 3D printing is potentially applicable for the fabrication of complex 3D objects, incorporating curved, and irregular shaped vascular networks. To optimize freeform 3D printing quality and performance, the rheological properties of the printing ink and supporting matrix, and the material matching between them are of paramount importance. In this review, we shall compare conventional 3D printing and freeform 3D printing technologies for the fabrication of vascular constructs, and critically discuss their working principles and their advantages and disadvantages. We also provide the detailed material information of emerging printing inks and supporting matrices in recent freeform 3D printing studies. The accompanying challenges are further discussed, aiming to guide freeform 3D printing by the effective design and selection of the most appropriate materials/processes for the development of full-scale functional vascularized artificial tissues.
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Rodriguez, Maria J., Thomas A. Dixon, Eliad Cohen, Wenwen Huang, Fiorenzo G. Omenetto, and David L. Kaplan. "3D freeform printing of silk fibroin." Acta Biomaterialia 71 (April 2018): 379–87. http://dx.doi.org/10.1016/j.actbio.2018.02.035.

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Guo, Shuang-zhuang, Xuelu Yang, Marie-Claude Heuzey, and Daniel Therriault. "3D printing of a multifunctional nanocomposite helical liquid sensor." Nanoscale 7, no. 15 (2015): 6451–56. http://dx.doi.org/10.1039/c5nr00278h.

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Shen, Hongyao, Bing Liu, Senxin Liu, and Jianzhong Fu. "Five-Axis Freeform Surface Color Printing Technology Based on Offset Curve Path Planning Method." Applied Sciences 10, no. 5 (March 3, 2020): 1716. http://dx.doi.org/10.3390/app10051716.

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Great progress has been made in 2D color printing with inkjet technology, and mature related products have come out, but there still exists great developmental space in 3D color printing. Therefore, a new path planning method based on the offset curve for 3D inkjet technology is proposed in this paper. Offset curves are generated on a freeform surface with geodesic equidistance, and then points for color printing are generated along the offset curves. In this paper, the principle of color printing technology with a 5-axis platform and the offset curve path planning (OCPP) method are presented. In addition, comparisons between the OCPP and adaptive filling algorithm based on the section method (AFSM) have been implemented. The OCPP significantly increased the rate of the theoretical filling area from 0.89 to 0.99 on a freeform surface.
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Lee, Dongyoun, and Junho Hong. "Development of an Adaptive Slicing Algorithm of Laminated Object Manufacturing Based 3D Printing for Freeform Formwork." Buildings 12, no. 9 (August 30, 2022): 1335. http://dx.doi.org/10.3390/buildings12091335.

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Recently, as “Freeform buildings” have increased in number, studies on ways to increase productivity in the construction of freeform buildings are increasing. In the case of 3D printing in construction, many studies are being conducted using the material extrusion method; among the 3D printing methods, manufacturing freeform forms using laminated object manufacturing (LOM) can overcome the limitation presented above. However, there is a lack of cases used in LOM construction sites, so it is necessary to increase the productivity of construction work and study the slicing method suitable for construction. Therefore, in this paper, we propose using study criteria and adaptive slicing methods to combine both the shape error and the manufacturing time of freeform construction. A case study was conducted to verify the results of this study; the freeform concrete form manufacturing with the algorithm that proposed this study could save 66.1% of the manufacturing time compared with CNC milling, and it needs 19.8% less manufacturing time than the existing uniform slicing method. This is a result of the production of one freeform form, and it can be expected to have a greater effect if applied to many freeform forms used in construction sites. In addition, the results of this study can be used as a decision-making tool that can determine the shape and manufacturing time of production according to the on-site situation.
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Blachowicz, Tomasz, Guido Ehrmann, and Andrea Ehrmann. "Optical elements from 3D printed polymers." e-Polymers 21, no. 1 (January 1, 2021): 549–65. http://dx.doi.org/10.1515/epoly-2021-0061.

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Abstract 3D printing belongs to the emerging technologies of our time. Describing diverse specific techniques, 3D printing enables rapid production of individual objects and creating shapes that would not be produced with other techniques. One of the drawbacks of typical 3D printing processes, however, is the layered structure of the created parts. This is especially problematic in the production of optical elements, which in most cases necessitate highly even surfaces. To meet this challenge, advanced 3D printing techniques as well as other sophisticated solutions can be applied. Here, we give an overview of 3D printed optical elements, such as lenses, mirrors, and waveguides, with a focus on freeform optics and other elements for which 3D printing is especially well suited.
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Patrício, Sónia G., Liliana R. Sousa, Tiago R. Correia, Vítor M. Gaspar, Liliana S. Pires, Jorge L. Luís, José M. Oliveira, and João F. Mano. "Freeform 3D printing using a continuous viscoelastic supporting matrix." Biofabrication 12, no. 3 (May 15, 2020): 035017. http://dx.doi.org/10.1088/1758-5090/ab8bc3.

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Luo, Guanyi, Yafeng Yu, Yuxue Yuan, Xue Chen, Zhou Liu, and Tiantian Kong. "Freeform, Reconfigurable Embedded Printing of All‐Aqueous 3D Architectures." Advanced Materials 31, no. 49 (October 14, 2019): 1904631. http://dx.doi.org/10.1002/adma.201904631.

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Sher, Praveen, Clara R. Correia, Rui R. Costa, and João F. Mano. "Compartmentalized bioencapsulated liquefied 3D macro-construct by perfusion-based layer-by-layer technique." RSC Advances 5, no. 4 (2015): 2511–16. http://dx.doi.org/10.1039/c4ra11674g.

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A novel biofabrication process via perfusion-based LbL technique for bioencapsulated hydrogel beads as building blocks to produce freeform 3D construct with controllable switching of a solid to liquefied microenvironment for use in TE/organ printing.
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Štumberger, Gabriela, and Boštjan Vihar. "Freeform Perfusable Microfluidics Embedded in Hydrogel Matrices." Materials 11, no. 12 (December 12, 2018): 2529. http://dx.doi.org/10.3390/ma11122529.

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We report a modification of the freeform reversible embedding of suspended hydrogels (FRESH) 3D printing method for the fabrication of freeform perfusable microfluidics inside a hydrogel matrix. Xanthan gum is deposited into a CaCl2 infused gelatine slurry to form filaments, which are consequently rinsed to produce hollow channels. This provides a simple method for rapid prototyping of microfluidic devices based on biopolymers and potentially a new approach to the construction of vascular grafts for tissue engineering.
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Dissertations / Theses on the topic "Freeform 3d printing"

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Matthes, Jörg, Claudius Petzold, and Valentin Mauersberger. "Aufbereitung von 3D-Scandaten zur additiven Fertigung von orthopädischen Helmschalen mit Fusion 360 und Geomagic FreeForm." Technische Universität Chemnitz, 2019. https://monarch.qucosa.de/id/qucosa%3A34092.

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Im Rahmen des Forschungsprojektes ,,Entwicklung eines 3D Hochgeschwindigkeits-Rotationsdruckverfahren' an der Hochschule Mittweida, wird sich mit dem Erzeugen eines CAD-Modells eines Patientenschädels und der passgenauen Modellierung einer orthopädischen Helmschale für diesen beschäftigt. Ziel ist es die zeitintensive Modellherstellung mittels Gips einzusparen und die endgültige Helmschale im .stl-Format zu erzeugen. Weiter wird, mittels einer visuellen Programmierumgebung, ein Programm erzeugt um die Helmschale in einem polaren Koordinatensystem für den geplanten Hochgeschwindigkeits-Rotations-3D-Drucker auszurichten, zu slicen und die Koordinaten der einzelnen Punkte der Bahnkurven der Extruder auszugeben.
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Fitzgerald, Shawn. "A pneumatic conveying powder delivery system for continuously heterogeneous material deposition in solid freeform fabrication." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/46072.

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Great improvements are continuously being made in the solid free form fabrication (SFF) industry in terms of processes and materials. Fully functional parts are being created directly with little, if any, finishing. Parts are being directly fabricated with engineering materials such as ceramics and metals. This thesis aims to facilitate a substantial advance in rapid prototyping capabilities, namely that of fabricating parts with continuously heterogeneous material compositions. Because SFF is an additive building process, building parts layer-by-layer or even point-by-point, adjusting material composition throughout the entire part, in all three dimensions, is feasible. The use of fine powders as its build material provides the potential for the Selective Laser Sintering (SLS), ThreeDimensional Printing (3DP), and Freeform Powder Molding (FPM) processes to be altered to create continuously heterogeneous material composition. The current roller distribution system needs to be replaced with a new means of delivering the powder that facilitates selective heterogeneous material compositions. This thesis explores a dense phase pneumatic conveying system that has the potential to deliver the powder in a controlled manner and allow for adjustment of material composition throughout the layer.


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Onyeako, Isidore. "Resolution-aware Slicing of CAD Data for 3D Printing." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34303.

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3D printing applications have achieved increased success as an additive manufacturing (AM) process. Micro-structure of mechanical/biological materials present design challenges owing to the resolution of 3D printers and material properties/composition. Biological materials are complex in structure and composition. Efforts have been made by 3D printer manufacturers to provide materials with varying physical, mechanical and chemical properties, to handle simple to complex applications. As 3D printing is finding more medical applications, we expect future uses in areas such as hip replacement - where smoothness of the femoral head is important to reduce friction that can cause a lot of pain to a patient. The issue of print resolution plays a vital role due to staircase effect. In some practical applications where 3D printing is intended to produce replacement parts with joints with movable parts, low resolution printing results in fused joints when the joint clearance is intended to be very small. Various 3D printers are capable of print resolutions of up to 600dpi (dots per inch) as quoted in their datasheets. Although the above quoted level of detail can satisfy the micro-structure needs of a large set of biological/mechanical models under investigation, it is important to include the ability of a 3D slicing application to check that the printer can properly produce the feature with the smallest detail in a model. A way to perform this check would be the physical measurement of printed parts and comparison to expected results. Our work includes a method for using ray casting to detect features in the 3D CAD models whose sizes are below the minimum allowed by the printer resolution. The resolution validation method is tested using a few simple and complex 3D models. Our proposed method serves two purposes: (a) to assist CAD model designers in developing models whose printability is assured. This is achieved by warning or preventing the designer when they are about to perform shape operations that will lead to regions/features with sizes lower than that of the printer resolution; (b) to validate slicing outputs before generation of G-Codes to identify regions/features with sizes lower than the printer resolution.
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Furia, Gioia. "Développement d'une cellule robotisée pour l'impression de circuits électroniques sur la surface d'objets 3D et applications industrielles." Thesis, Université Grenoble Alpes, 2021. http://www.theses.fr/2021GRALI015.

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L’objectif de cette thèse est le développement d'une cellule robotisée 6 axes permettant l'impression de circuits électroniques à la surface d'objets de forme quelconque et adaptée au prototypage et à la production en petite série d'objets 3D intégrant de l'électronique de surface.La méthode de fabrication proposée se divise en plusieurs phases : une phase de numérisation, une phase de construction du maillage, une phase de projection de circuits, une phase d'analyse de la vitesse et une phase d’impression. Ce processus est flexible et très utile pour les applications de prototypage et de petites séries pour lesquelles il est nécessaire de changer fréquemment le substrat et les dimensions de l'objet 3D.Une approche de programmation hors ligne permettant l'impression de trajectoires conductrices sur des objets 3D et la génération automatique de la trajectoire et du programme robot d'impression a été développée. Et une méthodologie pour prédire la morphologie du circuit en adaptant les paramètres de projection en fonction de la trajectoire et de la vitesse du robot 6 axes a été proposée.Une interface dédiée qui permet de gérer le processus complet a également été développée pour gérer le processus d'impression rendant ainsi possible l'utilisation de la cellule par des personnes qui ne sont pas des experts en robotique car son utilisation ne nécessite pas de programmation, les programmes étant générés automatiquement.Enfin, des prototypes ont été présentés
The objective of this thesis is the development of a 6-axis robotic cell allowing the printing of electronic circuits on the surface of freeform objects and adapted to the prototyping and small series production of 3D objects integrating surface electronics.The manufacturing method proposed, from design to printing with a phase of scanning, mesh construction, circuit projection and speed analysis, is very useful for prototyping and small series applications where it is necessary to frequently change the substrate and the dimensions of the 3D object.An off-line programming approach allowing the printing of conductive trajectories on 3D objects and the automatic generation of the trajectory and the printing robot program has been developed. And a methodology to predict the circuit morphology by adapting the projection parameters according to the trajectory and the speed of the 6-axis robot has been proposed.A dedicated interface to manage the complete process has also been developed to control the printing process making it possible for people who are not experts in robotics to use the cell because its use does not require programming, the programs being generated automatically.Finally, prototypes were presented
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Books on the topic "Freeform 3d printing"

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3D Printing and Additive Manufacturing: Principles and Applications. World Scientific Publishing Co Pte Ltd, 2014.

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3D Printing and Additive Manufacturing: Principles and Applications. World Scientific Publishing Co Pte Ltd, 2016.

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Leong, Kah Fai, and Chee Kai Chua. 3D Printing and Additive Manufacturing: Principles and Applications. World Scientific Publishing Co Pte Ltd, 2016.

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Book chapters on the topic "Freeform 3d printing"

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Ko, Minjae, Donghan Shin, Hyunguk Ahn, and Hyungwoo Park. "InFormed Ceramics: Multi-axis Clay 3D Printing on Freeform Molds." In Robotic Fabrication in Architecture, Art and Design 2018, 297–308. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92294-2_23.

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Lindemann, H., R. Gerbers, S. Ibrahim, F. Dietrich, E. Herrmann, K. Dröder, A. Raatz, and H. Kloft. "Development of a Shotcrete 3D-Printing (SC3DP) Technology for Additive Manufacturing of Reinforced Freeform Concrete Structures." In RILEM Bookseries, 287–98. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99519-9_27.

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Hack, Norman, and Harald Kloft. "Shotcrete 3D Printing Technology for the Fabrication of Slender Fully Reinforced Freeform Concrete Elements with High Surface Quality: A Real-Scale Demonstrator." In RILEM Bookseries, 1128–37. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49916-7_107.

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Oxman, N., J. Laucks, M. Kayser, E. Tsai, and M. Firstenberg. "Freeform 3D printing." In Green Design, Materials and Manufacturing Processes, 479–83. CRC Press, 2013. http://dx.doi.org/10.1201/b15002-93.

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Vaezi, M., and S. Yang. "Freeform fabrication of nanobiomaterials using 3D printing." In Rapid Prototyping of Biomaterials, 41–92. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-08-102663-2.00003-4.

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Vaezi, M., and S. Yang. "Freeform fabrication of nanobiomaterials using 3D printing." In Rapid Prototyping of Biomaterials, 16–74. Elsevier, 2014. http://dx.doi.org/10.1533/9780857097217.16.

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Balasubramanian, K. R., V. Senthilkumar, and Divakar Senthilvel. "Introduction to Additive Manufacturing." In Advances in Civil and Industrial Engineering, 1–24. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-4054-1.ch001.

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Additive manufacturing (AM) is also referred to as 3D printing, rapid prototyping, solid freeform fabrication, rapid manufacturing, desktop manufacturing, direct digital manufacturing, layered manufacturing, generative manufacturing, layered manufacturing, solid free-form fabrication, rapid prototype, tool-less model making, etc. It is emerging as an important manufacturing technology. It is the process of building up of layer-by-layer by depositing a material to make a component using the digital 3D model data. The main advantages of AM are mass customization, minimisation of waste, freedom of designing complex structures, and ability to print large structures. AM is broadly applicable to all classes of materials including metals, ceramics, polymers, composites, and biological systems. The AM methods used for producing complex geometrical shapes are classified based either on energy source (laser, electron beam) used or the material feed stock (powder feed, wire feed).
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Conference papers on the topic "Freeform 3d printing"

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Mahmoudi, Mohammadreza, Scott R. Burlison, Salvador Moreno, and Majid Minary. "Freeform 3D-Printing of Pure Ceramics." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23429.

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Abstract Polymer derived ceramics (PDC’s) offer a unique opportunity to 3D-print ceramics; however, 3D printing of such polymers require it to be combined with specialized light-sensitive agents and layer-by-layer crosslinking using an optical beam due to their low viscosity. Here, three-dimensional printing of ceramics enabled by dispensing the preceramic polymer from a nozzle inside a yield stress fluid is being demonstrated. The printed parts are crosslinked in the same gel. After crosslinking process, the printed parts are taken out of the gel and prepared for high temperature pyrolysis process that converts the cured parts to ceramic. The specially designed gel was three orders of magnitude more viscous than the preceramic polymer at no shear, which provided a stable medium during the whole process for maintaining the shape of the printed material and prevented possible instabilities. The SEM images of the cross section of the specimens showed that the printed material was dense and without any apparent porosity or cracks. Statistical analysis on the mechanical properties of the printed preceramic polymer specimens revealed that the printed specimens had characteristic strength (∼257 MPa).
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Chen, Zhi, and Roberto Horowitz. "Vision-assisted Arm Motion Planning for Freeform 3D Printing." In 2019 American Control Conference (ACC). IEEE, 2019. http://dx.doi.org/10.23919/acc.2019.8814699.

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Wang, C. C., C. S. Wang, C. H. Yang, K. J. Yang, and T. R. Chang. "Meshes optimization in freeform and 3D printing for product design." In 2017 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM). IEEE, 2017. http://dx.doi.org/10.1109/ieem.2017.8289936.

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Lao, Wenxin, Mingyang Li, Lorenzo Masia, and Ming Jen Tan. "Approaching Rectangular Extrudate in 3D Printing for Building and Construction by Experimental Iteration of Nozzle Design." In Annual International Solid Freeform Fabrication Symposium. Laboratory for Freeform Fabrication and University of Texas at Austin, 2017. http://dx.doi.org/10.32656/sff.2017.208.

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Molloy, Isabella, and Tim Miller. "Digital Dexterity. Freeform 3D printing through direct toolpath manipulation for crafted artifacts." In ACADIA 2018: Re/Calibration: On Imprecision and Infidelity. ACADIA, 2018. http://dx.doi.org/10.52842/conf.acadia.2018.266.

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Molloy, Isabella, and Tim Miller. "Digital Dexterity. Freeform 3D printing through direct toolpath manipulation for crafted artifacts." In ACADIA 2018: Re/Calibration: On Imprecision and Infidelity. ACADIA, 2018. http://dx.doi.org/10.52842/conf.acadia.2018.266.

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Lépine, Thierry, Nicolas Rousselet, Yves Surrel, and Thomas Houllier. "Advanced optical freeform substrates fabricated by ceramic 3D printing and controlled by deflectometry." In Optical Fabrication, Testing, and Metrology VI, edited by Sven Schröder and Roland Geyl. SPIE, 2018. http://dx.doi.org/10.1117/12.2312649.

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Wang, Minjie, Shuwei Shen, Jie Yang, Erbao Dong, and Ronald Xu. "3D printing method for freeform fabrication of optical phantoms simulating heterogeneous biological tissue." In SPIE BiOS, edited by Robert J. Nordstrom, Jean-Pierre Bouchard, and David W. Allen. SPIE, 2014. http://dx.doi.org/10.1117/12.2041137.

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Niemelä, Marjo, Anqi Shi, Sara Shirowzhan, Samad Sepasgozar, and Chang Liu. "3D Printing Architectural Freeform Elements: Challenges and Opportunities in Manufacturing for Industry 4.0." In 36th International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2019. http://dx.doi.org/10.22260/isarc2019/0174.

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Hossain, Mohammad M., Richard W. Vuduc, Chandra Nath, Thomas R. Kurfess, and Thomas M. Tucker. "A Graphical Approach for Freeform Surface Offsetting With GPU Acceleration for Subtractive 3D Printing." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8525.

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The lack of plug-and-play programmability in conventional toolpath planning approach in subtractive manufacturing, i.e., machining leads to significantly higher manufacturing cost for CNC based prototyping. In computer aided manufacturing (CAM) packages, typical B-rep or NURBS based representations of the CAD interfaces challenge core computations of tool trajectories generation process, such as, surface offsetting to be completely automated. In this work, the problem of efficient generation of free-form surface offsets is addressed with a novel volumetric representation. It presents an image filter based offsetting algorithm, which leverages the parallel computing engines on modern graphics processor unit (GPU). The scalable voxel data structure and the proposed hardware-accelerated volumetric offsetting together advance the computation and memory efficiencies well beyond the capability of past studies. Additionally, in order to further accelerate the offset computation the problem of offsetting with a large distance is decomposed into successive offsetting using smaller distances. The accuracy of the offset algorithms is thoroughly analyzed. The developed GPU implementation of the offsetting algorithm is robust in computation, easy to comprehend, and achieves a 50-fold speedup on single graphics card (NVIDIA GTX780Ti) relative to prior best-performing dual socket quad-core CPU implementation.
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