GEOMETRICAL ACOUSTICS IN A HETEROGENEOUS ANISOTROPIC ELASTIC SOLID: APPLICATION TO A WAVY COMPOSITE

Karal and Keller [1] developed the geometrical acoustics for wave propagation in a heterogeneous isotropic medium, generally adopting the methods used in geometrical optics [2,3]. It is very difficult to find a solution for wave propagation in a heterogeneous anisotropic medium. Here, instead of finding an exact solution, we extend the geometrica