Determination of Stress Components From Thermoelastic Data Without Boundary Conditions

[+] Author and Article Information
T. G. Ryall, M. Heller, R. Jones

Defence Science and Technology Organisation, Aircraft Structures Division, Aeronautical Research Laboratory, Fishermens Bend, Port Melbourne 3207, Australia

J. Appl. Mech 59(4), 841-847 (Dec 01, 1992) (7 pages) doi:10.1115/1.2894051 History: Received November 30, 1990; Revised August 13, 1991; Online March 31, 2008


Recent investigations have shown that the temperature variation caused by sinusoidal loading of a solid consists of two harmonic components. In this paper it is shown that by using an appropriate Airy stress function the separated stress components can be obtained, almost always, with knowledge of these two components. Since the second harmonic response is small compared to the noise level, the question of experimental design is examined. The problem of uniqueness is also studied. The close similarity between the second harmonic response and various energy parameters is also investigated and its role in structural optimization is discussed. The method is demonstrated on a particular example using simulated noisy data.

Copyright © 1992 by The American Society of Mechanical Engineers
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