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RESEARCH PAPERS

Reflection and Transmission of Rayleigh Surface Waves by a Material Interphase

[+] Author and Article Information
Z. L. Li, J. D. Achenbach

Center for Quality Engineering and Failure Prevention, Northwestern University, Evanston, IL 60208

J. Appl. Mech 58(3), 688-694 (Sep 01, 1991) (7 pages) doi:10.1115/1.2897249 History: Received August 24, 1989; Revised March 12, 1990; Online March 31, 2008

Abstract

Reflection and transmission of Rayleigh surface waves by a juncture normal to the free surface, between identical or different materials, has been investigated. The juncture, which may be an interface containing defects or a thin layer, is represented by a layer of extensional and shear springs. The mathematical statement of the problem is reduced to a system of singular integral equations for the displacements on the free surface and the tractions and the displacements across the juncture. Numerical solutions of this system have been computed by the use of the boundary element method. Expressions for the reflection and transmission coefficients have subsequently been obtained by the use of half-plane Green’s functions in conjunction with an elastodynamic representation integral. Results are presented for selected values of the elastic constants of the joined bodies and the stiffness parameters of the juncture.

Copyright © 1991 by The American Society of Mechanical Engineers
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