Post-buckling optimization of composite structures using Koiter's method

Søren R. Henrichsen*, Paul M. Weaver, Esben Lindgaard, Erik Lund

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

23 Citations (Scopus)
297 Downloads (Pure)

Abstract

Thin-walled structures, when compressed, are prone to buckling. To fully utilize the capabilities of such structures, the post-buckling response should be considered and optimized in the design process. This work presents a novel method for gradient-based design optimization of the post-buckling performance of structures. The post-buckling analysis is based on Koiter's asymptotic method. To perform gradient-based optimization, the design sensitivities of the Koiter factors are derived, and new design optimization formulations based on the Koiter factors are presented. The proposed optimization formulations are demonstrated on a composite square plate and a curved panel where the post-buckling stability is optimized.

Original languageEnglish
Pages (from-to)902-940
Number of pages39
JournalInternational Journal for Numerical Methods in Engineering
Volume108
Issue number8
Early online date28 Mar 2016
DOIs
Publication statusPublished - 23 Nov 2016

Keywords

  • Asymptotic post-buckling
  • Composite optimization
  • Composite structures
  • Continuous fiber angle optimization
  • Koiter's method
  • Post-buckling optimization

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