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Structural and Multidisciplinary Optimization

, Volume 55, Issue 2, pp 569–581 | Cite as

Evolutionary topology optimization of elastoplastic structures

  • Liang XiaEmail author
  • Felix Fritzen
  • Piotr Breitkopf
RESEARCH PAPER

Abstract

We have recently proposed in (Fritzen et al., Int J Numer Methods Eng 106(6):430–453, 2016) an evolutionary topology optimization model for the design of multiscale elastoplastic structures, which is in general independent of the applied material law. Facing the variability of the final design for minor parameter changes when dealing with plastic structural designs, we further improve the robustness and the effectiveness of the BESO optimization procedure in this work by introducing a damping scheme on sensitivity numbers and by progressively reducing the sensitivity filtering radius. The damping scheme constraining the variance of the sensitivity numbers stabilizes the topological evolution process in particular for dissipative structural designs. By setting initially a large filter radius value and reducing it gradually, the emergence of the redundant structural branches, which are to be eliminated afterwards and are the main reasons deteriorating the design process, could be avoided. The robustness and the effectiveness of the improved model has been validated by means of benchmark numerical examples of conventional homogeneous structures.

Keywords

Topology optimization BESO Sensitivity analysis Adjoint method Elastoplasticity 

Notes

Acknowledgments

This work was carried out in the framework of the Labex MS2T, which was funded by the French Government, through the program “Investments for the future” managed by the National Agency for Research (Reference ANR-11-IDEX-0004-02). The contribution of Felix Fritzen is supported by the German Research Foundation (DFG) under grant DFG-FR2702/6 in the contract of Emmy-Noether-Group EMMA - Efficient Methods for Mechanical Analysis at the University of Stuttgart.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Laboratoire Roberval, UMR 7337 UTC-CNRS, Sorbonne Universites, Universite de Technologie de Compiegne, Centre de Recherches de RoyallieuCedexFrance
  2. 2.The State Key Laboratory of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhanChina
  3. 3.EMMA - Efficient Methods for Mechanical Analysis Group, Chair of Continuum Mechanics, Institute of Applied Mechanics (CE)University of StuttgartStuttgartGermany

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