STP546

    Experimental Stress Intensity Factor Measurements in Orthotropic Composites

    Published: Jan 1974


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    Abstract

    A new experimental technique is presented for studying the toughness of anisotropic plane bodies. The technique is based upon the Path Independent Integral concept (Rice, 1968) where a strain energy distribution is line-integrated (via a string of strain gages) along a convenient path which yields the singular behavior of the cracked body. The use of this technique is demonstrated for an isotropic (aluminum) plate and an orthotropic (fiber glass/epoxy) composite with favorable agreement with the analytical and numerical (finite elements) counterpart solutions.

    Keywords:

    composite materials, stress intensity, toughness, calibration, anisotropy, orthotropism, finite elements, strain energy methods, fiber glass reinforced plastics, strain gages


    Author Information:

    Tirosh, J
    Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa,

    Berg, CA
    University of Pittsburgh, Pittsburgh, Pa.


    Paper ID: STP35515S

    Committee/Subcommittee: D30.05

    DOI: 10.1520/STP35515S


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