The treatment of secondary strains within a strain-based failure assessment diagram

R. A. Ainsworth, P. J. Budden, C. Y. Oh, Yun-Jae Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In a companion paper, proposals for the shape of a strain-based failure assessment diagram (FAD) have been made. The developments in that paper and in related works on strain-based fracture assessment have largely been for remotely applied strains, such as those produced by welding. This paper re-writes existing methods for treating secondary stresses within stress-based FADs in the framework of the proposed strain-based FAD. It is shown that residual strains must be included fully in the elastic regime but at large applied strains their contribution to fracture can be relaxed considerably. Practical methods for inclusion of secondary strains within the strain-based FAD are then developed and shown to be conservative relative to some detailed finite element calculations.

Original languageEnglish
Pages (from-to)14-20
Number of pages7
JournalInternational Journal of Pressure Vessels and Piping
Volume104
DOIs
Publication statusPublished - 2013 Apr 1

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Keywords

  • Failure assessment diagram
  • Secondary stress
  • Strain-based

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

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