Role of the geometrical parameters of the fibers and effects of fiber distribution in the matrix on the creep deformation behavior of 20% discontinuous fiber reinforced composite were numerically investigated, including the debonding and fiber pull-out mechanisms. During the analyses in the composite it is assumed that the matrix deforms with a power law creep relationship and the fibers are rigid. Results indicate that for a given fiber geometry and distribution parameters in the matrix, an increase in the interfacial strength or an increase in the work of separation per unit area of interface reduces the secondary creep rates. For even very weak interface characteristics, it is possible to achieve lower secondary creep rates and delayed interface failure by suitable selection of the geometrical parameters of the fibers and by controlling the distribution of the fibers in the matrix. 6 figs, 12 refs.
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