Influence of paint coating on thermo elastic stress and dissipated energy measurement

Abstract

When the material is subjected to cyclic load, temperature changes due to the thermoelastic effect is observed. The stress distribution can be evaluated by thermoelastic temperature change. Temperature change due to the energy dissipation caused by plastic slip deformation is measured by infrared camera. Anticorrosion coating is applied to a lot of mechanical structures. When the temperature change is measured over the coating, thermoelastic stress analysis and dissipated energy measurement are affected by the anticorrosion coating. In this study, the effect of the anticorrosion coating on the temperature measurement over the coating was investigated by numerical simulation and experiment. It was found from numerical simulation and experiments that the ratio of the temperature amplitude on coating to that on the metal surface decreases with increasing in load frequency, and the time delay of the temperature change on the coating relative to the metal surface increases with increasing in load frequency.