Continuum topology optimization for monolithic compliant mechanisms of micro-actuators

Luo Zhen, Du Yixian, Chen Liping, Yang Jingzhou, Karim Abdel-Malek

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

A multi-objective scheme for structural topology optimization of distributed compliant mechanisms of micro-actuators in MEMS condition is presented in this work, in which mechanical flexibility and structural stiffness are both considered as objective functions. The compliant micro-mechanism developed in this way can not only provide sufficient output work but also have sufficient rigidity to resist reaction forces and maintain its shape when holding the work-piece. A density filtering approach is also proposed to eliminate numerical instabilities such as checkerboards, mesh-dependency and one-node connected hinges occurring in resulting mechanisms. SIMP is used as the interpolation scheme to indicate the dependence of material modulus on element-regularized densities. The sequential convex programming method, such as the method of moving asymptotes (MMA), is used to solve the optimization problem. The validation of the presented methodologies is demonstrated by a typical numerical example.

Original languageEnglish
Pages (from-to)58-68
Number of pages11
JournalActa Mechanica Solida Sinica
Volume19
Issue number1
DOIs
StatePublished - Mar 2006

Keywords

  • compliant mechanisms
  • convex programming
  • filtering approach
  • microactuators
  • structural optimization
  • topology optimization

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