The quasi-Rayleigh waves in a solid layered media with a weak interface

The Rayleigh waves in a solid layered media is dispersive. Using the "spring" model for a weak interface between two solids, the characteristic equation for the Quasi-Rayleigh waves in an isotropic solid layered isotropic media with a weak interface is presented. The numerical results for the typical coating structure with rigid, slip and weak interface are shown in this paper. The influence of the interface stiffness constants on the velocity of the quasi-Rayleigh waves is considered. The numerical results show that the interface characteristics of the coating structure can be nondestructively evaluated by employing the quasi-Rayleigh waves in the low frequency band.