Bridged interface cracks in anisotropic bimaterials
نویسنده
چکیده
The bonding strength between dissimilar materials in composites is often relatively weak. Interface debonding and cracking are of common occurrence. As an e ective method to minimize such failures, ® bre stitching is used to enhance the bonding strength when joining layers in polymer composites. With the presence of the reinforcing ® bre, the overall elastic response for each component of the composite is, in general, anisotropic. This paper investigates the elastic behaviour of bridged interface cracks in anisotropic bimaterials. From the equilibrium of the interface crack, a system of Cauchy integral equations for the required distributed dislocation density is obtained. When the bridging force depends linearly on the crack-opening displacement, explicit solutions are given in terms of a series of Jacobi polynomials. For illustration, a bridged interface crack in isotropic bimaterials is examined in detail. Results suggest that bridging ® bres e ectively enhance the toughness of the composite. When the bridging force increases, the e ect of interface mismatch becomes insigni® cant, being overshadowed by the e ect of the bridging forces. }
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