Analysis of Multiple Cracks in a Sandwiched Layer

In this work we present a methodology and a solution for multiple cracks in nonhomogeneous plate using the dislocation complex potential and Fourier transformation techniques. The geometry of the problem consists of general crack orientation embedded at infinite strip, that is, sandwiched between two half planes. The fundamental perturbation problem is formulated by establishing a system of singular integral equations, whose solution gives mixed-mode Stress Intensity Factors (SIFs, k) and strain energy release rate (SERR, G). The numerical integration of the singular integral equations is carried out by using a Lobatto type collection technique. Finite element analysis (FEA) of the representative problem is provided for accuracy comparison. Finally, parametric studies for two crack interactions are presented.