Representation of the displacement rate between the loading points in terms of applied stress and temperature and its relation to creep crack growth rate, C*, P and Q* parameters

A. Toshimttsu Yokobori, H. Tomizawa, H. Sakata, T. Kako, T. Kuriyama

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    16 Citations (Scopus)

    Abstract

    The displacement rate δ between the loading points in SUS 304 stainless steel has been experimentally obtained under several applied gross stress and high temperatures, and the equation for δ has been obtained experimentally as a function of applied gross stress σg and absolute temperature T. Then, the relation of δ to creep crack growth rate da/dt was clearly shown in terms of equation. Furthermore, the relation has been clarified between the energy rate line integral C* as affected by δ, and P parameter. In this way, it is clearly shown why log (da/dt) data plotted against log C* deviates in some systematic trend with the increase of temperature and gross stress, respectively, whereas log da/dt vs the P parameter becomes exactly the same and one straight line independent of temperature and gross stress. The discussion is made on that the similar relation will hold between the evaluation by C* and that by gQ or by Q*.

    Original languageEnglish
    Pages (from-to)805-816
    Number of pages12
    JournalEngineering Fracture Mechanics
    Volume28
    Issue number5-6
    DOIs
    Publication statusPublished - 1987

    ASJC Scopus subject areas

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

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