Bounds for the Rayleigh velocity in an incompressible orthotropic plate

Abstract In this paper, an incompressible orthotropic plate is studied for the bounds of Rayleigh wave speed. A parameter “ a ” of elastic anisotropy, for all orthotropic materials, is defined. It is found that, for all materials with − 4 a − 1 , we always have an upper bound for the Rayleigh velocity. In addition, for − 1 a 0 , we have either an upper or a lower bound for speed, c R , of the Rayleigh wave.