STP1080

    Toughness Models of Whisker-Reinforced Ceramic Matrix Composites

    Published: Jan 1990


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    Abstract

    This paper presents a theoretical investigation of the critical strain energy release rate, Gc, of whisker-reinforced ceramic matrix composites. Crack deflection is considered as the major energy dissipation mechanism in fracture. The modeling of crack deflection is conducted based on a determination of the path of advancement of the deflected crack front along whiskers. The knowledge of crack path provides the basis for evaluating the deflection-induced reduction in strain energy release rate. The theoretical predictions are compared with experimental data of silicon-carbide (SiC) whisker-reinforced Al2O3 composites.

    Keywords:

    composite materials, thermal properties, mechanical properties, whisker-reinforced composites, ceramic matrix composites, crack deflection, critical strain energy release rate


    Author Information:

    Chiang, Y-C
    Research assistant and professor, Center for Composite Materials and Department of Mechanical Engineering, University of Delaware, Newark, DE

    Chou, T-W
    Research assistant and professor, Center for Composite Materials and Department of Mechanical Engineering, University of Delaware, Newark, DE


    Paper ID: STP25394S

    Committee/Subcommittee: D30.94

    DOI: 10.1520/STP25394S


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