Topology optimization method by continuous approximation of material distribution

Kazumi Matsui, Kenjiro Terada

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We propose a new method for topology optimization, which is free from numerical instabilities such as checkerboard patterns and mesh-dependency, without introducing any additional constraint parameters. This aim is accomplished by the introduction of finite element approximation for continuous material distribution in a fixed design domain. That is, the continuous distribution of microstructures, or equivalently design variables, is realized in the whole design domain in the context of the homogenization design method (HDM), by the discretization with finite element interpolations. By virtue of this continuous FE approximation of design variables, continuous distribution like checkerboard patterns disappears without any filtering schemes. We call this technique the method of continuous approximation of material distribution (CAMD) to emphasize the continuity imposed on the "material field". Two representative numerical examples are presented to demonstrate the capability and the efficiency of the proposed approach against the numerical instabilities.

Original languageEnglish
Pages (from-to)1257-1264
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume69
Issue number8
DOIs
Publication statusPublished - 2003 Aug
Externally publishedYes

Keywords

  • Checkerboard patterns
  • Computational mechanics
  • Finite element method
  • Homogenization method
  • Optimum design
  • Topology optimization

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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