Elastic Wave Propagation in Laminated Composite Plates

[+] Author and Article Information
W. M. Karunasena

Department of Civil Engineering, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2

R. L. Bratton, S. K. Datta, A. H. Shah

Department of Mechanical Engineering and CIRES, University of Colorado, Boulder, Colorado 80309

J. Eng. Mater. Technol 113(4), 411-418 (Oct 01, 1991) (8 pages) doi:10.1115/1.2904119 History: Received November 01, 1990; Revised December 01, 1990; Online April 29, 2008


A stiffness method and an analytical method have been used to study the dispersion characteristics of guided waves in laminated composite plates. Both cross-ply and angle-ply plates have been considered in the analysis. The objective of the study is to analyze the effect of fiber orientation, ply layout configuration, and number of layers on the dispersion characteristics. A Rayleigh-Ritz type of approximation of the through-thickness variation of the displacements that maintain continuity of displacements and tractions at the interfaces between the layers has been used in the stiffness method. The analytical method solves the exact dispersion relation of the laminated plate by using the Muller’s method with initial guesses obtained through the stiffness method. Both methods are applicable to plates with arbitrary number of layers having distinct mechanical properties. Numerical results presented show strong influence of anisotropy on the guided waves.

Copyright © 1991 by The American Society of Mechanical Engineers
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