STP658

    Influence of Two-Dimensional Hygrotheramal Gradients on Interlaminar Stresses Near Free Edges

    Published: Jan 1978


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    Abstract

    Interlaminar stresses are determined for mechanical loading, uniform hygrothermal loading, and gradient moisture loading through implementation of a finite-element computer code. Nonuniform two-dimensional hygroscopic gradients are obtained from a finite-difference solution of the diffusion equation. It is shown that hygroscopic-induced stresses can be larger than those resulting from mechanical and thermal loading, and that the distribution of the interlaminar normal stress may be changed significantly in the presence of a two-dimensional moisture gradient in the boundary layer of a composite laminate.

    Keywords:

    moisture, temperature, composite materials, interlaminar stresses, finite elements, finite difference, diffusion, boundary layer, hygrothermal


    Author Information:

    Faryley, GL
    Graduate student and professor, Virginia Polytechnic Institute & State University, Blacksburg, Va.

    Herakovich, CT
    Graduate student and professor, Virginia Polytechnic Institute & State University, Blacksburg, Va.


    Paper ID: STP34862S

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP34862S


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