Optimal design of lattice structure considering constraints through additive manufacturing process

Yusuke Koike, Kuniharu Ushijima, Junji Kato

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this research, an optimization design of the lattice structure is investigated, which is based on the ground structure method. In recent years, as a result of rapid development of additional manufacturing technology, it has become possible to manufacture complicated shapes including periodic lattice structure. However, in real metal lattice samples, geometric imperfections may exist in every unit because of the stochastic influence of feasible processing path. In this study, a new ground structure method which does not leave elements with small cross sectional area was proposed. In particular, the effect of geometric constraints caused by additive manufacturing techniques on optimized results are discussed based on the robust topology optimization combining perturbation methods for quantifying uncertainty. In the end, a robust topology optimization was also discussed as a problem to minimize expected value and standard deviation of compliance.

Original languageEnglish
Title of host publication2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019
EditorsFerdinando Auricchio, E. Rank, P. Steinmann, S. Kollmannsberger, Simone Morganti
PublisherInternational Center for Numerical Methods in Engineering
Pages205-214
Number of pages10
ISBN (Electronic)9788494919480
Publication statusPublished - 2019
Event2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019 - Pavia, Italy
Duration: 11 Sep 201913 Sep 2019

Publication series

Name2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019

Conference

Conference2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019
Country/TerritoryItaly
CityPavia
Period11/09/1913/09/19

Keywords

  • 3D printing
  • Additive manufacturing
  • Cellular structure
  • Lattice structure
  • Robust design
  • Topology optimization

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