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

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

    Research output: Contribution to journalArticlepeer-review


    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. © 2013 Elsevier Ltd.
    Original languageEnglish
    Pages (from-to)14-20
    Number of pages6
    JournalInternational Journal of Pressure Vessels and Piping
    Publication statusPublished - Apr 2013


    • Failure assessment diagram
    • Secondary stress
    • Strain-based


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