Classification of the subsequent transonic states in anisotropic elasticity theory

Abstract

The theory of surface waves in anisotropic elastic media is to a great extent based on the topography of the outer slowness surface of the material. A limiting wave is represented, for a given propagation direction, as a point on the outer slowness surface. The set of limiting waves constitutes what has been called the transonic state. This concept is also applicable at velocities higher than the limiting velocity, and in the present paper we classify these transonic states, which we call subsequent transonic states.