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Multiscale design for additive manufactured structures with solid coating and periodic infill pattern
Umeå University, Faculty of Science and Technology, Department of Computing Science. (Design Optimization)
Dalian University of Technology.
2019 (English)In: Computer Methods in Applied Mechanics and Engineering, ISSN 0045-7825, E-ISSN 1879-2138, Vol. 357, article id UNSP 112605Article in journal (Refereed) Published
Abstract [en]

This paper considers multiscale topology optimization of an infill structure. The structure is composed of an optimized layout configuration at the macroscale with uniform optimized microstructures as infill lattices coated by a thin skin. The design optimization of the infill lattice is performed simultaneously with the topology optimization of macroscale structure, which also includes the coating. The classic Solid Isotropic Material with Penalization (SIMP) method is used to design the topology of the microstructure. The Novel Implementation of Asymptotic Homogenization (NIAH) evaluates the effective properties of the microstructure; the macroscale structural analysis uses these homogenized properties. The Porous Anisotropic Material with Penalization (PAMP) method realizes the two-scale topology optimization of the macrostructure and microstructure. Harmonic-mean based non-linear filters identify the coating layer and realize length scale control on the topologies of the macrostructure as well as the microstructure. These morphology mimicking non-linear filters also distinguish the skin and the infill lattice parts of the design at the macroscale. Several numerical examples demonstrate the effectiveness of the proposed optimization method.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 357, article id UNSP 112605
Keywords [en]
Topology optimization, Mathematical morphology, Coated structures, Periodic infill
National Category
Computational Mathematics
Identifiers
URN: urn:nbn:se:umu:diva-164775DOI: 10.1016/j.cma.2019.112605ISI: 000490427600031OAI: oai:DiVA.org:umu-164775DiVA, id: diva2:1366979
Funder
The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), IB2018-7470Swedish Foundation for Strategic Research , AM13-0029Available from: 2019-10-31 Created: 2019-10-31 Last updated: 2019-11-06Bibliographically approved

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Wadbro, Eddie

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
  • Other style
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  • de-DE
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  • nn-NO
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