Study of the thermo-elastic stress analysis (TSA) sensitivity in the evaluation of residual stress in non-ferrous metal

F. Di Carolo; R. De Finis; D. Palumbo; U. Galietti

doi:10.1117/12.2518400

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2 May 2019 Study of the thermo-elastic stress analysis (TSA) sensitivity in the evaluation of residual stress in non-ferrous metal

F. Di Carolo, R. De Finis, D. Palumbo, U. Galietti

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Proceedings Volume 11004, Thermosense: Thermal Infrared Applications XLI; 110040O (2019) https://doi.org/10.1117/12.2518400
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, Maryland, United States

Abstract

The Thermoelastic Stress Analysis (TSA) is a contactless technique able to determine the superficial stress of a component subjected to a dynamic load in a linear elastic field. In these conditions the thermoelastic effect shows the generation of small reversible temperature variations. In this work, a general equation was obtained for the evaluation of the thermoelastic signal. The proposed equation is valid under adiabatic and isentropic conditions, for generalized homogeneous and anisotropic materials in any load condition. By using the proposed generalized equation, TSA sensitivity to the variation of the physical and mechanical material characteristics and TSA sensitivity in the determination of residual stresses were studied. The case studies for performing numerical simulations were represented by AA6082 and Ti6Al4V non-ferrous metals. The results were then compared with the data obtained from experimental tests performed on AA 6082 samples.

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F. Di Carolo, R. De Finis, D. Palumbo, and U. Galietti "Study of the thermo-elastic stress analysis (TSA) sensitivity in the evaluation of residual stress in non-ferrous metal", Proc. SPIE 11004, Thermosense: Thermal Infrared Applications XLI, 110040O (2 May 2019); https://doi.org/10.1117/12.2518400

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