A shear surface wave at the interface of an elastic body and a micropolar liquid

The propagation of a shear surface wave (SSW) along the interface of an ela stic half-space liquid and micropolar half-space is considered. The phase v elocity of the wave and its attenuation constant are determined. It is show n that a SSW at the interface of a solid and a micropolar liquid propagates almost without dispersion, unlike a wave at the interface of a solid and a viscous Newtonian liquid in which the dispersion is noticeable at high fre quencies. The attenuation of the SSW is considerably weaker in the first ca se than the second. The attenuation constant decreases as the boundary visc osity increases. (C) 1999 Elsevier Science Ltd. All rights reserved.