Abstract
Recent investigations have shown that the temperature variations caused by the dynamic loading of a body depend on the local stresses in a nonlinear manner. It follows that if a body is subjected to a combination of static and harmonic loads, information about both the static and dynamic stresses is available in the thermal signal at the frequency of harmonic loading. In this paper it is demonstrated using real experimental data that this thermal information, together with parametric knowledge of the shape of a free boundary, is sufficient to determine the stress tensors due to the dynamic and static loads. The determination of these stress tensors is accomplished using a robust nonlinear least squares analysis.
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