Print Email Facebook Twitter Minimum compliance topology optimization of shell–infill composites for additive manufacturing Title Minimum compliance topology optimization of shell–infill composites for additive manufacturing Author Wu, J. (TU Delft Materials and Manufacturing) Clausen, Anders (Technical University of Denmark) Sigmund, Ole (Technical University of Denmark) Date 2017 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. Subject Additive manufacturingCoatingCompositeInfillTopology optimizationTwo-scale structure To reference this document use: http://resolver.tudelft.nl/uuid:fc53cb2e-5b45-464c-acb6-2e90bdbbcef9 DOI https://doi.org/10.1016/j.cma.2017.08.018 Embargo date 2019-10-20 ISSN 0045-7825 Source Computer Methods in Applied Mechanics and Engineering, 326, 358-375 Bibliographical note Accepted author manuscript Part of collection Institutional Repository Document type journal article Rights © 2017 J. Wu, Anders Clausen, Ole Sigmund Files PDF CMAME2017.pdf 9.28 MB Close viewer /islandora/object/uuid:fc53cb2e-5b45-464c-acb6-2e90bdbbcef9/datastream/OBJ/view