Simplified estimates of the creep crack growth parameter C(t) under primary/secondary stresses using the enhanced reference stress method

Terutaka Fujioka, Robert A. Ainsworth

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This paper describes simplified methods to estimate the fracture mechanics parameter, C(t), related to creep crack growth rates in non-steady state creep conditions produced by primary or secondary stresses. The methods proposed incorporate effects from initial plasticity and redistribution during a short period after a loading dwell starts, in addition to the estimate of the steady state creep crack growth parameter C* by the enhanced reference stress method. The methods have been validated by performing finite element elastic-plastic creep analyses of a circumferentially cracked cylinder subjected to load-controlled tension or thermal loads. © 2013 Elsevier Ltd.
    Original languageEnglish
    Pages (from-to)32-41
    Number of pages9
    JournalInternational Journal of Pressure Vessels and Piping
    Volume110
    DOIs
    Publication statusPublished - Oct 2013

    Keywords

    • Creep crack growth
    • Fracture mechanics
    • Non-steady state creep
    • Simplified estimate

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