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Stress concentration minimization of 2D filets using X-FEM and level set description

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Abstract

This paper presents and applies a novel shape optimization approach based on the level set description of the geometry and the extended finite element method (X-FEM). The method benefits from the fixed mesh work using X-FEM and from the curves smoothness of the level set description. Design variables are shape parameters of basic geometric features that are described with a level set representation. The number of design variables of this formulation remains small, whereas global (i.e. compliance) and local constraints (i.e. stresses) can be considered. To illustrate the capability of the method to handle stress constraints, numerical applications revisit the minimization of stress concentration in a 2D filet in tension, which has been previously studied in Pedersen (2003). Our results illustrate the great interest of using X-FEM and level set description together. A special attention is also paid to stress computation and accuracy with the X-FEM.

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Authors and Affiliations

  1. Automotive Engineering Aerospace and Mechanics Department, University of Liège, Chemin des Chevreuils, 1, building B52, 4000, Liège, Belgium

    Laurent Van Miegroet & Pierre Duysinx

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  1. Laurent Van Miegroet
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  2. Pierre Duysinx
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Correspondence to Laurent Van Miegroet.

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Van Miegroet, L., Duysinx, P. Stress concentration minimization of 2D filets using X-FEM and level set description. Struct Multidisc Optim 33, 425–438 (2007). https://doi.org/10.1007/s00158-006-0091-1

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  • DOI: https://doi.org/10.1007/s00158-006-0091-1

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