STP1290: Characteristics of Fatigue Life and Damage Accumulation of Short Fiber-Reinforced Polymer Composites

    Yokobori, AT
    Associate professor, Tohoku University, Sendai,

    Takeda, H
    Idemitsu Petrochemical Co., Chiba,

    Adachi, T
    Ishinomaki Senshu University, Miyagi

    Ha, JC
    Ishinomaki Senshu University, Miyagi

    Yokobori, T
    Dean and professor, School of Science and Engineering, Teikyo University, Tochigi,

    Pages: 16    Published: Jan 1996


    Abstract

    The relation between fatigue life and damage accumulation of fiber-reinforced polymer composite (FRP) is not yet clarified.

    For practical use of FRP, it is necessary to relate the fatigue life to the mechanism of damage accumulation. Damage formation is controlled by the mechanical behavior of the interface between the matrix and fiber. We used short glass fiber-reinforced polycarbonate composite in our experiments. By using an in situ (real time) observational fatigue testing machine, we investigated the relationship between fatigue life and damage accumulation.

    From these results, the fatigue life of this material was found to be dominated by damage accumulation which results from microfracture at the interface between the matrix and fiber. This microfracture is controlled by a cycle-dependent mechanism.

    Keywords:

    short fiber-reinforced polymer composite, glass fiber, polycarbonate, fatigue life, damage formulation, cycle-dependent mechanism, interface, discontinuous fiber, chopped fiber, Injection molding compound


    Paper ID: STP38231S

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP38231S


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