Antiplane surface acoustic waves propagating in elastic half-space coated with an anisotropic laminate

Authors

Xiangfa Wu, Department of Engineering Mechanics, University of Nebraska-LincolnFollow
Yuris A. Dzenis, Department of Engineering Mechanics, University of Nebraska-LincolnFollow

Date of this Version

9-2005

Comments

Published in Composites Science and Technology 65:11–12 (September 2005), pp. 1761–1768; doi 10.1016/j.compscitech.2005.03.003 Copyright © 2005 Elsevier Ltd. Used by permission. http://www.elsevier.com/locate/compscitech

Abstract

Dispersion relation of antiplane surface acoustic waves (SAWs) propagating in elastic half-space coated with an anisotropic laminate was determined explicitly by means of Stroh's formalism within the subsonic range, where is no energy leakage into the substrate. During the procedure, the governing dynamic equation in each anisotropic layer and the displacement–traction continuity at interfaces were exactly satisfied by Stroh's functions. Explicit algebraic equation was derived for determining the dispersion relation. As an example, the wave number vs. phase velocity diagram for steel half-space coated with a graphite-fiber/epoxy laminate with a [± 45°/0°₂] lay-up was demonstrated. The given method can be used for the study of SAW properties of anisotropic coating systems and non-destructive evaluation based on surface/guided wave methods.