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    STP1020

    On the Influence of Crack Plane Orientation in Fatigue Crack Propagation and Catastrophic Failure

    Published: 01 January 1989


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    Abstract

    During fatigue crack propagation in sufficiently thin metallic sheets, shear lips develop which spread throughout the material thickness. This leads to a situation where, in addition to a Mode I component of deformation, there is also a Mode III component. Finite-element calculations are carried out on several geometries in an attempt to assess the effect of this additional deformation upon catastrophic failure and fatigue crack propagation. for these particular geometries, it is shown that the slant crack is less dangerous than the flat crack with regard to catastrophic failure and, when propagating in fatigue, may grow faster or slower than the flat crack.

    Keywords:

    fracture mechanics, fatigue, Mode III, mixed-mode, slant crack, shear lips, finite elements


    Author Information:

    Banks-Sills, L
    Associate professor and graduate student, Faculty of Engineering, Tel Aviv University, Ramat Aviv,

    Schur, D
    Associate professor and graduate student, Faculty of Engineering, Tel Aviv University, Ramat Aviv,


    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP18840S