EFFECT OF AN IMPERFECT INTERFACE ON THE SINGULAR STRESS FIELD OF A MONOCLINIC BIMATERIAL WEDGE

In the present analysis, the stress singularities of a monoclinic bimaterial composite wedge subjected to traction free boundary conditions are investigated. The interfacial tractions are assumed to be continuous, directly proportional to the displacement discontinuities and inversely proportional to the distance from the wedge apex. The Stroh formalism is used to obtain the relevant expressions for displacements and stresses. For a monoclinic bimaterial composite where the plane of symmetry of each material coincides with the cross-sectional plane, the inplane and antiplane deformations are uncoupled and in this analysis only the inplane problem is considered. The characteristic equation for the order of singularities is obtained and expressed in terms of the generalized Dundurs constants, two complex parameters of both materials, wedge angles and interfacial stiffness parameters. Numerical results are given for bimaterial orthotropic wedges with different fiber orientations. Here the effects of the imperfect interface are extensively investigated.