Infill Optimization for Additive Manufacturing - Approaching Bone-like Porous Structures

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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.
Original languageEnglish
JournalIEEE Transactions on Visualization and Computer Graphics
Volume24
Issue number2
Pages (from-to)1127 - 1140
ISSN1077-2626
DOIs
Publication statusPublished - 2018
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Infill, Additive manufacturing, Trabecular bone, Porous structures, Topology optimization

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