Abstract
In this paper, the effect of interfacial debonding in the wake of a crack on the stress for matrix cracking is studied for unidirectional fiber reinforced ceramics. A simple shear-lag model is adopted to calculate the stress and strain fields in the fiber and the matrix. A criterion for crack-wake debonding is proposed by treating the debonding process as a particular crack propagation problem. Then, by using an energy balance approach the formulation of the matrix cracking stress of an infinite fiber-bridged crack is derived. The theoretical results are compared with experimental data of SiC/borosilicate, SiC/LAS and C/borosilicate ceramic composites.
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