On stress-constrained fail-safe structural optimization considering partial damage

Suguang Dou*, Mathias Stolpe

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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This brief note presents some observations about the modelling of stress constraints in fail-afe structural optimization considering local degradation of member properties. An analytical study of a three-bar example demonstrates the impact of the constraint modelling choices on the optimal design. One notable finding is that degradation of one arbitrary member may cause a worse objective function than complete removal of the member. The observation is similar to the singular optimum issue in topology optimization with stress constraints, but applies also to sizing problems. This deserves special attention and should be considered when modelling fail-safe structural optimization with stress constraints.
Original languageEnglish
JournalStructural and Multidisciplinary Optimization
Pages (from-to)929-933
Number of pages5
Publication statusPublished - 2021


  • Fail-safe structural optimization
  • Partial damage
  • Stress constraints
  • Sizing optimization


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