Structural topology optimization with strength and heat conduction constraints

Akihiro Takezawa, Gil Ho Yoon, Seung Hyun Jeong, Makoto Kobashi, Mitsuru Kitamura

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

In this research, a topology optimization with constraints of structural strength and thermal conductivity is proposed. The coupled static linear elastic and heat conduction equations of state are considered. The optimization problem was formulated; viz., minimizing the volume under the constraints of p-norm stress and thermal compliance introducing the qp-relaxation method to avoid the singularity of stress-constraint topology optimization. The proposed optimization methodology is implemented employing the commonly used solid isotropic material with penalization (SIMP) method of topology optimization. The density function is updated using sequential linear programming (SLP) in the early stage of optimization. In the latter stage of optimization, the phase field method is employed to update the density function and obtain clear optimal shapes without intermediate densities. Numerical examples are provided to illustrate the validity and utility of the proposed methodology. Through these numerical studies, the dependency of the optima to the target temperature range due to the thermal expansion is confirmed. The issue of stress concentration due to the thermal expansion problem in the use of the structure in a wide temperature range is also clarified, and resolved by introducing a multi-stress constraint corresponding to several thermal conditions.

Original languageEnglish
Pages (from-to)341-361
Number of pages21
JournalComputer Methods in Applied Mechanics and Engineering
Volume276
DOIs
Publication statusPublished - 2014 Jul 1

Keywords

  • Heat conduction
  • Sensitivity analysis
  • Stress constraints
  • Thermal expansion
  • Topology optimization

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Computer Science Applications

Fingerprint Dive into the research topics of 'Structural topology optimization with strength and heat conduction constraints'. Together they form a unique fingerprint.

Cite this