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    An Investigation of Cumulative Damage Development in Quasi-Isotropic Graphite/Epoxy Laminates

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    Results of an experimental investigation of cumulative damage development in two unnotched quasi-isotropic graphite/epoxy laminates subjected to quasistatic tension and tension-tension fatigue are presented. Damage development in the form of transverse cracking in all off-axis laminae, longitudinal cracking, and delamination was monitored via the surface replication technique. Results of the study include a detailed description of the chronology of damage development prior to failure. Evidence also is presented in support of a damage model based on the concept of a characteristic damage state.


    transverse cracking, saturation spacing, characteristic damage state, monotonic tension, tension-tension fatigue, composite materials

    Author Information:

    Masters, JE
    Senior research scientist, General Dynamics Corp., Fort Worth, Tex.

    Reifsnider, KL
    Professor, Virginia Polytechnic Institute and State University, Blacksburg, Va.

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP34320S