Analysis of the temperature evolution in cyclic loading using the thermoelastic effect with plastic deformation

The conventional approach to temperature evolution in cyclic loading is explained by a hysteresis curve with three phases. However, it has not been matched with experimental data except in the beginning of the cyclic loading. Thus, this study suggests a new approach to temperature evolution with three phases in cyclic loading by plastic deformation using the thermoelastic effect. The sample was fabricated following ASTM D638 standard for cyclic loading, and the temperature was measured during the cyclic loading by an infrared camera. Thermography was used to observe partial heating caused by cracks. The results were evaluated with the correlation ( R 2 ) coefficient between temperature and the derived equation as 0.96 in phases 1 and 2. Also, the partial heating was observed showing the effect of cracks for the temperature evolution in phases 2 and 3. Based on these results, a new approach to temperature evolution in cyclic loading is suggested.