Imperfect interface approach
...e transmission conditions, which can be evaluated by asymptotic methods, are presented without any details. The interface is assumed to be very thin so that and ~L, where L is a characteristic dimension of the bonded components, while is a small dimensionless parameter ( <<1). Three different interfaces can be distinguished: soft interface , comparable interface: , and finally, stiff interface: . Different transmission conditions are summarized in Table 1. In Table 2 the formulae to calculate the parameters aj (j=1,2,3) are given In order to investigate the edge effect on both sides of the rectangle (cf. Fig. 1), a strong mesh refinement in this region is performed (cf. Fig. 2). Furthermore, the mesh is generated in such a way so that it is possible to evaluate the displacements and stresses along the axes of symmetry: lines A and B (cf. Fig. 1) and along the transition zone of the materials: lines C and D. (The lines Ce and De belong to the bonded material and the lines Ci and Di to the interface.) Additionally, the density of the mesh increases near the free boundary (cf. Fig. 3) to accurately investigate the distribution of the displacement and stress fields without necessity to use any special singular element in FEM analysis. In order to investigate the edge e...