WIAS Preprint No. 1788, (2013)

Relating phase field and sharp interface approaches to structural topology optimization



Authors

  • Blank, Luise
  • Farshbaf Shaker, Mohammad Hassan
  • Garcke, Harald
  • Styles, Vanessa

2010 Mathematics Subject Classification

  • 49Q10 74P10 49Q20 74P05 65M60

Keywords

  • Structural topology optimization, linear elasticity, phase-field method, first order conditions, matched asymptotic expansions, shape calculus, numerical simulations

Abstract

A phase field approach for structural topology optimization which allows for topology changes and multiple materials is analyzed. First order optimality conditions are rigorously derived and it is shown via formally matched asymptotic expansions that these conditions converge to classical first order conditions obtained in the context of shape calculus. We also discuss how to deal with triple junctions where e.g. two materials and the void meet. Finally, we present several numerical results for mean compliance problems and a cost involving the least square error to a target displacement.

Appeared in

  • ESAIM Control Optim. Calc. Var., 20 (2014) pp. 1025--1058.

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