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    Evaluating The Influence of Plasticity-Induced Closure on Surface Flaw Shape Evolution Under Cyclic Loading Using a Modified Strip-Yield Model

    Published: 01 January 1999

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    A slice synthesis methodology is used to construct a modified strip-yield model for the part-through semi-elliptical surface flaw, enabling prediction of plasticity-induced closure along the crack front and subsequent fatigue crack growth. Predictions of flaw shape evolution under cyclic loading are compared with experimental data for steel specimens under constant-amplitude cyclic bending. Model predictions are shown to correlate well with experimental data. The influence of stress level and mean stress on surface flaw shape evolution is evaluated.


    fatigue, crack propagation, surface flaw, part-through flaw, crack closure, plasticity-induced closure

    Author Information:

    Daniewicz, SR
    Assistant professor, Mississippi State University, Mississippi State, MS

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP15770S