STP868: In Situ SEM Observation of Fracture Processes in Short Glass Fiber Reinforced Thermoplastic Composite

    Sato, N
    Toyota Central Research and Development Laboratories, Aichiken,

    Kurauchi, T
    Toyota Central Research and Development Laboratories, Aichiken,

    Sato, S
    Toyota Central Research and Development Laboratories, Aichiken,

    Kamigaito, O
    Toyota Central Research and Development Laboratories, Aichiken,

    Pages: 11    Published: Jan 1985


    Abstract

    To study the fracture mechanism of a short glass fiber reinforced thermoplastic composite, the surface of the composite under stress was examined by a scanning electron microscope. The fracture processes, including crack initiation and propagation, could be observed in situ. The fracture was proved to proceed through five stages: (1) occurrence of a cluster of microcracks and voids in the matrix located at the fiber ends; (2) propagation of the interfacial microcracks in the matrix located on the fiber sides; (3) occurrence of bands of microcracks in the matrix, accompanied by the formation of shear bands in the matrix; (4) crack openings and slow crack propagation in the shear bands, followed by yielding and necking; and (5) catastrophic crack propagation, leading to the failure of the composite.

    Keywords:

    short fiber reinforced composite, fracture mechanism, in situ, SEM observation, microcrack, void, shear band, crack opening


    Paper ID: STP34270S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP34270S


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