STP497

    Creep Behavior of Elastic Fiber/Epoxy Matrix Composite Materials

    Published: Jan 1972


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    Abstract

    Creep tests were run on glass fiber and Thornel fiber/epoxy matrix composites. Composite creep rates depend on specimen geometry, which can be explained by considering the average deviatoric and equivalent stress states that exist in the matrix. Tests indicate that the matrix is in the bulk plastic region considerably before failure. The stress dependence of the creep rate is used to determine the yield stress of the pure epoxy and the stress level at which the matrix of a composite becomes fully plastic.

    Keywords:

    creep tests, creep rate, stresses, failure, yield stress, strain rate, plastic properties, deformation, modulus of elasticity, composite materials, fiberglass reinforced plastics, epoxy resins, laminates, stress strain diagrams


    Author Information:

    Koeneman, JB
    Bell Telephone Laboratories, Columbus, Ohio

    Kicher, TP
    Associate professor of engineering, Case Western Reserve University, Cleveland, Ohio


    Paper ID: STP27765S

    Committee/Subcommittee: D30.07

    DOI: 10.1520/STP27765S


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