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    A Nonlinear History-Dependent Damage Model for Low Cycle Fatigue

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    A nonlinear damage postulate that embodies the dependence of the damage rate on cycle-dependent changes in the bulk microstructure and the surface topography is examined. The postulate is analytically formulated in terms of the deformation history dependence of the bulk behavior. This formulation is used in conjunction with baseline data in accordance with the damage postulate to predict the low cycle fatigue resistance of OFE copper. Close comparison of the predictions with experimentally observed behavior suggests that the postulate offers a viable basis for nonlinear damage analysis.


    fatigue, damage, nonlinear assessment, model, history-dependent, damage postulate, similitude

    Author Information:

    Leis, BN
    Research Leader, Mechanics Section, Advanced Materials Department, Batelle, Columbus Division, Columbus, OH

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP24480S