Abstract
A simple mathematical model has been developed to explain the mechanical behavior of a mono-fiber reinforced metal-matrix composite subjected to transverse loading. It is assumed that the metal-matrix material behaves as an elastic material at room temperature, and as a power-law creep material at elevated temperatures. In the model, material responses (stress, strain and displacement) are quantitatively described. The model predicts the effect of fiber size on failure mechanisms. Decohesion of the fiber/matrix interface is predicted to be easier as the fiber diameter increases, irrespective of test temperature. The model also predicts the location of void initiation which occurs away from the fiber/matrix interface at elevated temperatures. In addition, elongation was found to increase with increasing fiber diameter. Some qualitative experimental evidence supporting the theoretical predictions is presented.
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