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RESEARCH PAPERS

Flexural Vibrations of an Elastic Plate With Two Symmetric Viscoelastic Coatings

[+] Author and Article Information
Paul Hertelendy

Oakland Tribune, Oakland, Calif.

Werner Goldsmith

Department of Applied Mechanics, University of California, Berkeley, Calif.

J. Appl. Mech 34(1), 187-194 (Mar 01, 1967) (8 pages) doi:10.1115/1.3607622 History: Received September 30, 1965; Revised April 04, 1966; Online September 14, 2011

Abstract

The flexural-vibration characteristics of a symmetric, doubly infinite composite plate consisting of two outer layers of a linear viscoelastic material bonded to an elastic core have been examined, the viscous effects in the coating being represented by a complex shear modulus. Calculations of the dispersive and damping effects have been obtained for the lowest three modes by an extension of the exact Rayleigh-Lamb equations. Loss factors of the lowest modes have also been evaluated by two readily computed approximate methods; the results have been compared with those from the exact solution. The material constants were chosen to be representative of a high-polymer coating and an aluminum core. The modal behavior of the systems and coupling effects are discussed.

Copyright © 1967 by ASME
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