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    STP1417

    Propagation of Non-Planar Fatigue Cracks: Experimental Observations and Numerical Simulations

    Published: 01 January 2003


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    Abstract

    Two types of mixed-mode fatigue crack growth tests are described. Experimental observations of non-planar fatigue crack growth are compared with numerical predictions from the computer code, FRANC3D. In these analyses, the evolution of crack shape is not assumed a priori. The code predicts evolving fatigue crack shapes and fatigue crack growth rates based on linear-elastic mixed-mode stress intensity factor distributions along the evolving crack fronts. The simulations are shown to result in accurate crack front shape predictions, and to predict overall fatigue crack life in a reasonable and/or conservative manner.

    Keywords:

    three-dimensional, non-planar, mixed-mode, fracture mechanics, fatigue life, experimental, numerical, fatigue crack


    Author Information:

    Riddell, WT
    US DOT/Volpe National Transportation Systems Center, Cambridge, MA

    Ingraffea, AR
    Baum Professor of Civil and Environmental Engineering, Cornell University, Cornell University, Ithaca, NY

    Wawrzynek, PA
    Cornell Fracture Group, Ithaca, NY


    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP11095S