A simple method based for computing crack shapes

Daren Peng, Pu Huang, Rhys Jones, Adam Bowler, D Edwards

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

The growth of cracks fromsmall naturally occurring material discontinuities plays amajor role in the operational lifespan of aircraft structures. Calculating the life of an airframe structure requires the determination of the crack path(s)which for complex real life geometries can often be highly complex. This paper presents a simple method based on finite element analysis for estimating the crack growth path. The analysis is based on an element removal approach and uses the major principal stress as the failure criteria. Evolution strategies are derived from the biological process of evolution. Three examples are presented demonstrating the utility of the proposed technique.
Original languageEnglish
Pages (from-to)41-56
Number of pages16
JournalEngineering Failure Analysis
Volume59
Publication statusPublished - 2016

Keywords

  • Crack shapes
  • Intergranular cracking
  • Nastran
  • Genetic algorithm

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