Effect of T-stress on the cleavage crack growth resistance resulting from plastic flow

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    Abstract

    Crack growth is studied numerically for cases where fracture occurs by atomic separation, sc that the length scale of the fracture process is typically much smaller than the dislocation spacing. Thus, the crack growth mechanism is brittle, but due to plastic flow at some distance from the crack tip, the materials show crack growth resistance. It is shown here that the resistance is strongly dependent on the value of the non-singular T-stress, acting parallel to the crack plane. The numerical technique employed makes use of a thin dislocation-free strip of elastic material inside which the crack propagates, with the material outside described by continuum plasticity. Thus the width of the strip is a material length scale comparable to the dislocation spacing or the dislocation cell size.
    Original languageEnglish
    JournalJournal de physique iv
    Volume8
    Issue numberP8
    Pages (from-to)391-398
    ISSN1155-4339
    DOIs
    Publication statusPublished - Nov 1998
    Event2nd European Mechanics of Materials Conference on Mechanics of Materials with Intrinsic Length Scale (EUROMECH-MECAMAT 97) - Magdeburg, Germany
    Duration: 23 Feb 199826 Feb 1998
    Conference number: 2

    Conference

    Conference2nd European Mechanics of Materials Conference on Mechanics of Materials with Intrinsic Length Scale (EUROMECH-MECAMAT 97)
    Number2
    CountryGermany
    CityMagdeburg
    Period23/02/199826/02/1998

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