The concentration of a wave field at the interface of elastic media

The steady symmetrical oscillations of a transversely non-uniform elastic rectangular region, consisting of three bonded uniformisotropic rectangles, are considered, where the elastic characteristics of the inner rectangle are assumed to be different from those of the external rectangles. Using methods developed previously [1,2], the dependence of the order of the singularity of the stress field at the interface on the combinations of the constants of elasticity of the joined media and on their wave impedances is investigated.