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    A Criterion for Mixed-Mode Matrix Cracking in Graphite-Epoxy Composites

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    In this paper, mixed-mode matrix fracture in graphite-epoxy composites was studied. Experimental investigation was conducted on a family of doubly side-notched unidirectional off-axis specimens. By varying the notch depth and the off-axis angle, a total of 28 fracture conditions of differing mixed-mode ratios were produced. Fracture analysis of the test data suggested that the total strain energy release rate is a suitable material condition for mixed-mode matrix cracking in graphite-epoxy composites.


    composite materials, graphite-epoxy, mixed-mode matrix fracture, strain energy release rates, finite-element analysis, mixed-mode fracture criterion

    Author Information:

    Binienda, W
    University of Akron, Akron, OH

    Wang, ASD
    Drexel University, Philadelphia, PA

    Zhong, Y
    Drexel University, Philadelphia, PA

    Reddy, ES
    Drexel University, Philadelphia, PA

    Committee/Subcommittee: D30.07

    DOI: 10.1520/STP24117S