A new approach to design of structures subjected to pressure loads using topological optimization methods

Noam N.Y. Shemesh, Moshe B. Fuchs

Research output: Contribution to conferencePaperpeer-review

Abstract

The field of topological design of structures has been growing steadily since 1988 when Bendsoe and Kikuchi published their ground breaking paper. By now their method has become recognized as a self-standing discipline with idiosyncrasies and intrinsic techniques within the field of Structural and Multidisciplinary Optimization. The present paper deals with a class of problems which is not considered within the standard topological design formulation. Actually, these problems are known as design dependent load problems, which usually involve pressure loads. Solving these kinds of problems enlarges the field of solutions not only for finding the topological shape of the structure but also for finding the pressure/structure interface. Tackling this kind of loading raises some difficulties when using standard topological approaches, in particular, for the definition of the loading interface. Some authors have already proposed a solution to the problem and this paper adds its contribution. Our solution is based on the use of a parameterized load surface combined with a low Young's modulus value which is imposed in the pressure zone while the Young's modulus in the structural region retains its nominal value. This has the effect of extracting material from the pressure region thus enforcing a crisp pressure/material interface. This method, which is applied with a fixed grid discretization, is conceptually simple and easy to implement.

Original languageEnglish
StatePublished - 2004
EventEuropean Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2004 - Jyvaskyla, Finland
Duration: 24 Jul 200428 Jul 2004

Conference

ConferenceEuropean Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2004
Country/TerritoryFinland
CityJyvaskyla
Period24/07/0428/07/04

Keywords

  • Design dependent loads
  • Pressure loads
  • Topological optimization

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