STP1256

    Fatigue Fracture of Thin Plates Under Tensile and Transverse Shear Stresses

    Published: Jan 1995


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    Abstract

    Crack growth in thin sheets loaded under tension and transverse shear is studied experimentally and the mechanics of such problems are reviewed. A small scale yielding approach is adopted that describes the crack tip fields using a combination of Kirchhoff plate theory and plane stress elasticity. Techniques for calculating the relevant stress intensity factors are presented and validated with results from six test cases. Fatigue crack growth rates are measured using a double-edge notch test specimen configuration loaded in tension and torsion. A geometrically nonlinear finite element computation is used to determine the stress intensity factors as functions of axial load, torque, and crack length.

    Keywords:

    fatigue fracture, aluminum alloys, plate theory, mixed mode fracture, finite element analysis, geometric nonlinearity, aircraft structure


    Author Information:

    Viz, MJ
    Graduate Research Assistant, Assistant Professor, and Undergraduate Research Assistant, Cornell University, Ithaca, New York

    Zehnder, AT
    Graduate Research Assistant, Assistant Professor, and Undergraduate Research Assistant, Cornell University, Ithaca, New York

    Bamford, J-D
    Graduate Research Assistant, Assistant Professor, and Undergraduate Research Assistant, Cornell University, Ithaca, New York


    Paper ID: STP16410S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP16410S


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