STRESS-CONCENTRATIONS IN AN INTERMINGLED HYBRID COMPOSITE

This paper studies the stress redistribution in a tensile hybrid compo site sheer due to the breakage of a high modulus fiber. Employing a co ntinuous distribution of dislocations, a set of singular integral equa tions is established to analyze the fiber crack impinging upon weakly bonded fiber-matrix interfaces. After solving the integral equations n umerically, the stress concentration factors of both high modulus and low modulus fibers are evaluated as a function of loading stress and i nterfacial parameters. The results are compared with those obtained fr om shear-lag model solution.