The Effect of a Thin Layer Surface Inhomogeneity on Dynamic Surface Response

[+] Author and Article Information
L. M. Brock

Department of Engineering Mechanics, University of Kentucky, Lexington, Ky.

J. Appl. Mech 45(1), 95-99 (Mar 01, 1978) (5 pages) doi:10.1115/1.3424280 History: Received March 01, 1977; Online July 12, 2010


A thin layer surface inhomogeneity consisting of small, evenly distributed rigid bodies is perfectly bonded to an elastic half space. Constant normal and shear line loads are applied to the layer and the dynamic surface response is calculated by Laplace transform techniques. The product of the layer thickness and the rigid body/half-space mass densities proves to be a critical parameter in determining the response. It is found that the layer has a noticeable effect on the half-space surface response in relation to the free-surface behavior. In particular, while no standard surface-interface waves exist, evidence for small values of the critical parameter indicates the presence of pseudo-Rayleigh waves similar to those found in fluid-solid interface analyses.

Copyright © 1978 by ASME
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