STP1184

    Influence of Fiber-Matrix Interface on Dynamic Response of CFRP

    Published: Jan 1994


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    Abstract

    The static and dynamic response of fiber-reinforced composite coupons with various levels of fiber surface treatments was investigated using the classical approach of strain measurement (stiffness degradation using an extensometer), as well as a dynamic phase and dynamic gain (dynamic compliance) response measurement method proposed by Elahi et al. [1]. From the experimental results, the property data are shown to correlate with the classical method of damage monitoring and demonstrate the advantages of the phase and gain response analysis. The proposed approach makes it possible to monitor continuously the fatigue damage evolution in any material system in real time without the use of an extensometer or strain gages, making it an ideal candidate for studying damage under high temperature or extremely corrosive environments where the usage of extensometers is either not practical or not possible.

    Keywords:

    fatigue, composite, frequency response, phase lag, stiffness, interface


    Author Information:

    Elahi, M
    Graduate research assistant and Alexander Giacco professor, Virginia Polytechnic Institute and State University, Blacksburg, VA

    Reifsnider, KL
    Graduate research assistant and Alexander Giacco professor, Virginia Polytechnic Institute and State University, Blacksburg, VA

    Swain, RE
    Engineer, Smith & Nephew Richards, Inc., Memphis, TN


    Paper ID: STP18129S

    Committee/Subcommittee: E08.03

    DOI: 10.1520/STP18129S


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