TY - JOUR
T1 - Using a virtual skeleton to increase printability of topology optimized design for industry-class applications
AU - Mass, Yoram
AU - Amir, Oded
N1 - Publisher Copyright:
© 2018 Académie des sciences
PY - 2018/11
Y1 - 2018/11
N2 - This article broadens the scheme previously developed to associate topology optimization with additive manufacturing through the use of a virtual skeleton, consisting in solving the same physical problem with a discrete approach and then with a continuum one. This procedure for 3D designs is applied to various domain geometries, to demonstrate its pertinence on high-resolution industrial cases. An algorithm searching for the best printing direction, exploring the solid angle, is also described and validated; the surface-shaped presentation of the result allows immediate understanding of the influence of the discrete problem parameters, while its running time is much lower than a unique continuum optimization simulation, which proves the attractiveness of the method. In the three examples studied, the procedure outputs exhibit greater printability than the ones produced by traditional methods in each of the printing direction tested, albeit responsibility is left to the final user to choose his best trade-off. Furthermore, the unprintable zones are readily displayed to be either reworked or supported. Explanations about increase of convergence likelihood on discrete structures despite the geometry complexity of an industrial application are also provided and demonstrated.
AB - This article broadens the scheme previously developed to associate topology optimization with additive manufacturing through the use of a virtual skeleton, consisting in solving the same physical problem with a discrete approach and then with a continuum one. This procedure for 3D designs is applied to various domain geometries, to demonstrate its pertinence on high-resolution industrial cases. An algorithm searching for the best printing direction, exploring the solid angle, is also described and validated; the surface-shaped presentation of the result allows immediate understanding of the influence of the discrete problem parameters, while its running time is much lower than a unique continuum optimization simulation, which proves the attractiveness of the method. In the three examples studied, the procedure outputs exhibit greater printability than the ones produced by traditional methods in each of the printing direction tested, albeit responsibility is left to the final user to choose his best trade-off. Furthermore, the unprintable zones are readily displayed to be either reworked or supported. Explanations about increase of convergence likelihood on discrete structures despite the geometry complexity of an industrial application are also provided and demonstrated.
KW - 3-D design
KW - 3-D printing
KW - Additive manufacturing
KW - Overhang angles
KW - Topology Optimization
KW - Virtual skeleton
UR - http://www.scopus.com/inward/record.url?scp=85051659678&partnerID=8YFLogxK
U2 - 10.1016/j.crme.2018.08.005
DO - 10.1016/j.crme.2018.08.005
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AN - SCOPUS:85051659678
SN - 1631-0721
VL - 346
SP - 1104
EP - 1121
JO - Comptes Rendus - Mecanique
JF - Comptes Rendus - Mecanique
IS - 11
ER -