Journal article · Preprint article · Ahead of Print article
Infill Optimization for Additive Manufacturing - Approaching Bone-like Porous Structures
Porous structures such as trabecular bone are widely seen in nature. These structures exhibit superior mechanical properties whilst being lightweight. In this paper, we present a method to generate bone-like porous structures asl ightweight infill for additive manufacturing. Our method builds upon and extends voxel-wise topology optimization.
In particular, for the purpose of generating sparse yet stable structures distributed in the interior of a given shape, we propose upper bounds on the localized material volume in the proximity of each voxel in the design domain. We then aggregate the local per-voxel constraints by their p-norm into an equivalent global constraint, in order to facilitate an efficient optimization process.
Implemented on a high-resolution topology optimization framework, our results demonstrate mechanically optimized, detailed porous structures which mimic those found innature. We further show variants of the optimized structures subject to different design specifications, and analyze the optimality and robustness of the obtained structures.
Language: | English |
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Publisher: | IEEE |
Year: | 2018 |
Pages: | 1127-1140 |
ISSN: | 19410506 , 10772626 and 21609306 |
Types: | Journal article , Preprint article and Ahead of Print article |
DOI: | 10.1109/TVCG.2017.2655523 |
ORCIDs: | Wu, Jun , Aage, Niels and Sigmund, Ole |
Bones Mechanical factors Optimization Shape Solids Three-dimensional printing Topology additive manufacturing additive manufacturing-approaching bone-like porous structures cs.GR efficient optimization process high-resolution topology optimization framework mechanical properties optimisation optimized structures per-voxel constraints porous materials porous structures sparse yet stable structures topology topology optimization trabecular bone voxel-wise topology optimization