STP687: Computer-Aided Fracture Mechanics Life Prediction Analysis

    Peterson, DE
    Member of the technical staff and project engineer, Rocketdyne Division of Rockwell International, Canoga Park, Calif.

    Vroman, GA
    Member of the technical staff and project engineer, Rocketdyne Division of Rockwell International, Canoga Park, Calif.

    Pages: 14    Published: Jan 1979


    Abstract

    The fracture mechanics analysis and computer logic used to perform design life predictions is described. Initial part-through crack defects are analyzed under the conditions of constant-amplitude loading to predict the number of loading cycles applied before breakthrough or failure. A criterion is provided to predict the transition from part-through crack growth characteristics to through crack growth characteristics. A breakthrough criterion is also provided.

    Keywords:

    fatigue crack growth, constant amplitude loading, life predictions, part-through crack, through crack, transitioning, breakthrough, crack propagation, fatigue (materials)


    Paper ID: STP35036S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP35036S


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