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Paint coating characterization for thermoelastic stress analysis of metallic materials

By A.F. Robinson, J.M. Dulieu-Barton, S. Quinn and R.L. Burguete

Abstract

In thermoelastic stress analysis (TSA) it is normal practice to coat metallic specimens with<br/>black paint to enhance and standardize the surface emissivity. It is assumed that the paint<br/>coating has no effect on the thermal emission from the specimen, but it is well known that the<br/>response is sensitive to paint coating thickness, particularly at higher frequencies. In this paper<br/>the effects of loading frequency and paint coating thickness on the thermoelastic response are<br/>investigated. The thermoelastic response is compared to theory, and optimum test conditions<br/>and coating characteristics are suggested. The motivation for the work is to develop a<br/>TSA-based means of residual stress assessment, where the measurement of much smaller<br/>temperature changes than those that are resolved in standard TSA is required; therefore the<br/>analysis is much more sensitive to the effects of the paint coating. However, the work<br/>presented in this paper is relevant to a wide range of TSA investigations and presents data that<br/>will be of interest to all practitioners of TSA

Topics: TJ
Year: 2010
OAI identifier: oai:eprints.soton.ac.uk:159133
Provided by: e-Prints Soton
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