Thermoelastic Effect During Tensile Cyclic Deformation
Experimental results of the effects of thermomechanical coupling occurring in metal during a cyclic tension test are presented. In each cycle the thermoelastic effect, i.e. the decrease of temperature in the initial stage of deformation was observed. Afterwards the specimen was heated up due to initiation and evolution of the mechanisms of plastic deformation. The change of character of the temperature behaviour of the sample subjected to loading allowed us to determine the limit between the elastic and plastic regime. Moreover, it was noticed that the temperature characteristics vs. stress manifested the transition from the elastic to plastic deformation more distinctly than the stress-strain relations.
E. PIECZYSKA, Critical point of the elastoplastic transition in terms of thermomechanical coupling, Mech. Teoret. Stos., 34, 2, pp. 281-306, 1996.
E. PIECZYSKA, Determination of the beginning of plastic deformation on the basis of the analysis of temperature changes [in Polish], IFTR Reports, 30/55, 1995.
M.B. BEVER, D.L. HOLT and A.L. TITCHENER, The stored energy of cold work, Progress in Materials Science, 25, 1973.
A. CHRYSOCHOOS, E. MAISONNEUVE, G. MARTIN, H. CAUMON and J.C. CHEZEAUX, Plastic and dissipated work and stored energy, Nucl. Engin. Dis., 114, pp. 323-333, 1989.
J. SCHMIDT, Thermographic effects due to the stress field development; applications to the analysis of effects of cyclic loads [in Polish], Ph.D. thesis, Kraków 1988.
N. RAJIC, A.K. WONG and Y.C. LAM, A thermomechanical technique for measuring residual stress, Experimental Techniques, 26, March-April, 1996.
S.P. GADAJ, W.K. NOWACKI and E. PIECZYSKA, lnvestigation of temperature distribution during plastic deformation of stainless steel, Proc. 50th Eurotherm Seminar: Quantitative Infrared Thermography QIRT'96, Stuttgart, September 2-5, 1996.
S.P. GADAJ, W.K. NOWACKI and E.A. PIECZYSKA, Changes of temperature during the simple shear test of stainless steel, Arch. Mech., 48, 4, pp. 779-788, 1996.