Thermal Effects in Viscoelastic Materials
The science of thermoelasticity is a study of the coupling phenomenon between thermal energy and mechanical deformation in elastic materials. The non-contacting investigation of the thermoelastic effect using infrared technology was first reported in 1967 by Beigen [1,2]. This technology has developed to a stage where highly sensitive array detectors are now widely used for thermoelastic stress analysis (TSA) and a variety of thermographic and thermal NDE studies. Array systems such as the DeltaTherm system may be used to obtain full-field maps of the minute differential temperature on the surface of a component due to the thermoelastic effect, In addition, these systems are also capable of providing static thermal images of the absolute temperature of the component at the time the image is captured.
KeywordsResidual Stress Viscoelastic Material Array System Driving Frequency Coupling Phenomenon
- 1.Beigen, M.H., Structural stress measurements with an infrared radiometer, ISA Transactions, 1967, vol. 6, p. 49–53.Google Scholar
- 2.Beigen, M.H., Infrared radiometric stress instrumentation application range study, NASA Contractor Report: CR-1067, 1968.Google Scholar
- 3.Lesniak, J.R. and Boyce, B. R., A high-speed differential thermographic camera, Proceeding of the Society of Experimental Mechanics Spring Conference, 1994, Baltimore.Google Scholar
- 4.Harwood, N., Cummings, W.M., and MacKenzie, A. K., An introduction to thermoelastic stress analysis, Thermoelastic Stress Analysis, Harwood, N. and Cummings, W. M., eds., 1991, Adam Higler. p. 1–34.Google Scholar
- 5.Gyekenyesi, A.L. and Baaklini, G. Y., Quantifying residual stresses by means of thermoelastic stress analysis, In Proceedings of the International Conference on Stress Nondestructive Evaluation of Aging Materials and Composites IV, Proceedings of SPIE, 2003, vol. 3993, p. 78–91.CrossRefGoogle Scholar