STP1122

    Near-Threshold Fatigue Crack Growth Prediction under Spectrum Loading

    Published: Jan 1992


      Format Pages Price  
    PDF Version (276K) 15 $25   ADD TO CART
    Complete Source PDF (9.9M) 15 $114   ADD TO CART


    Abstract

    A constant crack closure stress-based model assuming the absence of a threshold stress intensity range under spectrum loading forms the basis for a simple procedure to predict crack growth under spectrum loading. The procedure requires material constants that can be derived from constant amplitude fatigue crack growth tests at two stress ratios: (1) at a high stress ratio in the absence of fatigue crack closure, and (2) at a stress ratio corresponding to the most severe cycle under the load spectrum of interest. Crack growth estimates were compared with available experimental data for a variety of materials and load spectra.

    Keywords:

    fatigue crack, spectrum loading, Rainflow analysis, fatigue crack closure, threshold stress intensity


    Author Information:

    Sunder, R
    National Aeronautical Laboratory, Bangalore,


    Paper ID: STP24158S

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP24158S


    CrossRef ASTM International is a member of CrossRef.