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    STP1025

    Accuracy of Multiaxial Fatigue Testing with Thin-Walled Tubular Specimens

    Published: 0


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    Abstract

    In this study, we attempt to quantify the effects of certain factors which control the accuracy of multiaxial low-cycle fatigue results obtained from thin-walled tubular specimens. This investigation includes: 1. Some experimental observations regarding the behavior of thin-walled tubes under cyclic axial load and internal-external pressure. 2. A finite-element study of the influence of specimen shape. Tubular specimens of 27-mm diameter with different gauge lengths, wall thicknesses, and transition areas are analyzed. In each case, stress and strain distributions through the wall thickness in the gauge length and the critical strain amplitude at buckling are determined for different combinations of axial load and internal-external pressure. 3. Some experimental fatigue results obtained from tubular specimens under cyclic biaxial loading.

    Keywords:

    low-cycle multiaxial fatigue, tubular specimens, specimen geometry, strain measurement and computation


    Author Information:

    Lefebvre, DF
    Professor, graduate student, and professor, Universite de Sherbrooke, Sherbrooke, Quebec

    Ameziane-Hassani, H
    Professor, graduate student, and professor, Universite de Sherbrooke, Sherbrooke, Quebec

    Neale, KW
    Professor, graduate student, and professor, Universite de Sherbrooke, Sherbrooke, Quebec


    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP24016S