STP942: Computer-Based Prediction of Cyclic Deformation and Fatigue Behavior

    A, Conle
    Ford Scientific Research Laboratories, Dearborn, MI

    TR, Oxland
    University of Waterloo, Waterloo, Ontario

    TH, Topper
    University of Waterloo, Waterloo, Ontario

    Pages: 19    Published: Jan 1988


    Abstract

    The paper briefly reviews the history of rheological spring-slider based, stress-strain models, and the early computerized versions used to simulate cyclic deformation and predict fatigue life. A set of rules is introduced which allows cycle by cycle simulation of the local stress-strain behavior at the root of a notched component subjected to any variable amplitude load history; predicts the crack initiation life; and, with two modifications to the notch analysis and the fatigue damage summation routines, models the local stress-strain behavior at the crack tip and resulting crack propagation rates. Supporting software that has resulted in practical applications for automotive design is discussed.

    Keywords:

    fatigue (materials), metals, stress, strain, models, crack initiation, crack propagation, variable amplitude, computer simulation


    Paper ID: STP24548S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP24548S


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