Volume 12, Issue 4 (December 1990)

    Residual Strength and Residual Fracture Toughness of Random Short-Fiber Composites during Cyclic Fatigue

    CODEN: CTROAD

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    Abstract

    The present study is part of a series of research work on microscopic damage evolution and associated macroscopic property degradation of random short-fiber composites under cyclic fatigue loading. In this paper, the effects of fatigue damage on the tensile failure strength and the opening mode fracture toughness of an SMC-R50 composite were investigated. Test specimens, which had been conditioned to various preselected fatigue damage stages, were measured for their residual properties. The results indicated that both the failure strength and fracture toughness were degraded during the cyclic fatigue loading. The reduction in strength was appreciable, but was less than that observed in the matrix-controlled elastic properties. The reduction of the residual fracture toughness, as a result of the local high-stress field, was affected even less appreciably.


    Author Information:

    ES-M, Chim
    associate research engineer, Shell Development Company, Houston, TX

    SS, Wang
    distinguished university professor, University of Houston, Houston, TX


    Stock #: CTR10203J

    ISSN: 0884-6804

    DOI: 10.1520/CTR10203J

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    Author
    Title Residual Strength and Residual Fracture Toughness of Random Short-Fiber Composites during Cyclic Fatigue
    Symposium , 0000-00-00
    Committee D30