New weight filtering factor of nonlinear design for topology optimization under cyclic loading based on proportional technique

Suphanut Kongwat, Hiroshi Hasegawa

Research output: Contribution to journalArticle

Abstract

The structure should be focusing on the nonlinear behavior when an external load is applied and causes a large deformation. This research presents the topology optimization under bilinear elastoplastic and isotropic and kinematic hardening material properties. Optimization is performed using the solid isotropic material with penalization approach, and each element density is updated based on a proportional technique. The proportional technique is a non-sensitivity method proposed by combining with the fully stressed criterion for the topology optimization to be one factor of the update function. The cyclic load was applied to the structure and indicated an effect of stress fluctuation through the optimization process. Numerical examples were examined to investigate the final layout based on the nonlinear material properties under a nonlinear analysis. Finally, a new filtering density equation was proposed to avoid stress fluctuation during the optimization process. The optimal layout was clearly obtained while investigating the cyclic load effect.

Original languageEnglish
Pages (from-to)1635-1644
Number of pages10
JournalJournal of Mechanical Science and Technology
Volume34
Issue number4
DOIs
Publication statusPublished - 2020 Apr 1

Keywords

  • Cyclic load
  • Nonlinear material
  • Proportional technique
  • Structural design
  • Topology optimization
  • Weight filtering density

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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