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    STP1231

    A Fatigue Crack Propagation Model Under Variable Loading

    Published: 01 January 1994


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    Abstract

    In order to understand the behavior of metallic structures in service it is necessary to be careful in both the experimental analysis and the analytical modeling of the fatigue crack propagation under variable loading.

    A relatively general model to simulate crack propagation under variable loadings is proposed. It describes the cycle-by-cycle progression of the crack. The propagation law formulation is actually a Paris law type model, transient effects are introduced through a concept of an effective SIF range, as did Elber, whose approach it generalizes.

    This model offers some advantages: it remains simple, it generalizes well-know models, and the transient effect predictions are encouraging as shown in some proposed applications.

    Keywords:

    fatigue crack propagation, models, variable loadings, transient effects, test automation, fracture (materials), fatigue (materials), testing methods, data analysis


    Author Information:

    Gerald, J
    Scientific adviser and mechanical engineering, Delégation Générale pour l'Armement, direction des Constructions Navales, DCN Ingeniérie, Paris,

    Menegazzi, A
    Scientific adviser and mechanical engineering, Delégation Générale pour l'Armement, direction des Constructions Navales, DCN Ingeniérie, Paris,


    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP13957S