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RESEARCH PAPERS

The Various Approximations of the Bimetallic Thermostatic Strip

[+] Author and Article Information
Christopher D. Pionke, Gerald Wempner

Engineering Science and Mechanics Program, School of Civil Engineering, Georgia Institute of Technology, Atlanta, GA 30332

J. Appl. Mech 58(4), 1015-1020 (Dec 01, 1991) (6 pages) doi:10.1115/1.2897676 History: Received August 15, 1990; Revised March 04, 1991; Online March 31, 2008

Abstract

A thin strip, formed by bonding two dissimilar materials, constitutes a simple thermostatic element. If edge effects are neglected, then the strip is reduced to a uniform beam, or plate, with two degrees-of-freedom. The flexure occurs only because of the bond and interfacial shear which is also accompanied by transverse normal stress. These latter stresses are very localized at the end and edges. Here, the elementary approximations, and refinements via finite elements, are presented and compared. Deflections are given with reasonable accuracy by the simple approximations, but the severe interfacial stresses are revealed only by the refinements.

Copyright © 1991 by The American Society of Mechanical Engineers
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