An Analysis of Viscoelastic Damping Characteristics of a Simply-Supported Sandwich Beam

[+] Author and Article Information
A. Chatterjee

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga.

J. R. Baumgarten

University of Nebraska, Lincoln, Neb.; Georgia Institute of Technology, Atlanta, Ga.

J. Eng. Ind 93(4), 1239-1244 (Nov 01, 1971) (6 pages) doi:10.1115/1.3428069 History: Received November 16, 1970; Online July 15, 2010


An energy method is employed to analyze the damping in the fundamental mode of a simply-supported sandwich beam with viscoelastic core material sandwiched between two elastic metallic layers called the facings. The theory developed herein enables one to predict the damped natural frequency and the damping (in terms of logarithmic decrement) of the transverse vibration of a beam of known dimensions, provided the moduli-frequency characteristics of the core material are known. Experimental measurements bear out the accuracy of the theoretical predictions. The theory can very easily be extended for the analysis of higher discrete modes.

Copyright © 1971 by ASME
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