STP1343

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

    Published: Jan 1999


      Format Pages Price  
    PDF (328K) 18 $25   ADD TO CART
    Complete Source PDF (12M) 18 $190   ADD TO CART


    Abstract

    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.

    Keywords:

    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


    Paper ID: STP15770S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP15770S


    CrossRef ASTM International is a member of CrossRef.