208 / 2019-08-28 21:49:49

Study on thermomechanical behavior caused by the frictional heat in torsional fretting wear

temperature rises, torsional fretting, slip regime, wear mechanism, finite element simulation

计算力学在工程中的应用 > 断裂、疲劳与损伤等行为研究

The temperature has been identified as a significant factor in both the wear behavior and mechanism of damage in fretting contact. However, the influence of the temperature rise caused by the frictional heat on torsional fretting wear has been unrevealed. In this work, taking into account frictional power dissipation, a finite element (FE) model was developed to analyze the thermomechanical behavior in torsional fretting wear, providing a further understanding and the fundamental study on the torsional fretting wear mechanism. Based on the verification of the proposed model by analytical solutions from Johnson, the von Mises stress distribution, the temperature rise, and the link between surface plastic deformation and the temperature rise were predicted and discussed. The fact was that obvious surface temperature rises were observed for the full slip regime, which had large plastic deformation in the contact surface. And it was found that surface plastic deformation had a remarkable increase with the increase of the temperature rise. In consequence, it could be deduced that the temperature rise could significantly affect surface wear behavior in torsional fretting, which indicated that serious wear occurred in the full slip regime.