Metal fatigue assessment based on temperature evolution and thermodynamic entropy generation

Abstract In the present study, a general model was developed for temperature evolution prediction during metal's uniaxial fatigue loading. The prediction model leads to a reasonably accurate determination of specimen temperature distribution. It also identifies the effective parameters of fatigue temperature variation. It was observed that plastic strain energy is an important contributor to the temperature evolution trend. The proposed model is also employed to evaluate empirical relations, proposed for fatigue life prediction. At the last stage, based on the proposed model for temperature and Morrow model as plastic work density, the proposed model was utilized for the entropy generation prediction.