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RESEARCH PAPERS

A Second-Law Analysis of Thermoelastic Damping

[+] Author and Article Information
V. K. Kinra, K. B. Milligan

Center for Mechanics of Composites and Department of Aerospace Engineering, Texas A&M University, College Station, TX 77843

J. Appl. Mech 61(1), 71-76 (Mar 01, 1994) (6 pages) doi:10.1115/1.2901424 History: Received February 27, 1992; Revised December 31, 1992; Online March 31, 2008

Abstract

In accordance with the Thomson effect (Thomson, 1853), when a thermoelastic solid is subjected to a tensile stress, it cools. Similarly, when a homogeneous material is subjected to an inhomogeneous stress field or when an heterogeneous material is subjected to any stress field (homogeneous or inhomogeneous), different parts of the material undergo different temperature changes. As a result irreversible heat conduction occurs and entropy is produced. In this paper we take the second law of thermodynamics as our starting point and develop a general theory for calculating the thermoelastic damping from the entropy produced.

Copyright © 1994 by The American Society of Mechanical Engineers
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