STP942

    Computer-Based Prediction of Cyclic Deformation and Fatigue Behavior

    Published: Jan 1988


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    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


    Author Information:

    A, Conle
    Ford Scientific Research Laboratories, Dearborn, MI

    TR, Oxland
    University of Waterloo, Waterloo, Ontario

    TH, Topper
    University of Waterloo, Waterloo, Ontario


    Paper ID: STP24548S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP24548S


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