Research On Numerical Simulation Of Two Types Of Fretting Wear

Fretting can be commonly found in nuclear reactors, aerospace, automotive, electric power and telecommunications equipment and other fields with the components in tight. With the requirements of high precision and long life, high reliability in high-tech fields, as well as variety of harsh environmental conditions, fretting increasingly apparent. Fretting wear damage has become one of the main causes in failure of some of the key parts and components. To this end, the fretting wear has gotten more and more attention of scholars both at home and abroad.So far, the research on fretting wear has gotten almost eight decades of time. Research results are quite abundant, many theories have been proposed. The studies focusing on fretting wear at home and abroad basically come from the experimental point of view, however, analysis of fretting wear from the perspective of numerical simulation is fewer. In view of this, we try to make research paper on fretting by numerical simulation, and explain the experiment results..Basing on the composition of the ball and flat-panel modal, the current study is summarized as follows:(1) basing on elasticity theory and Hertz theory, the contact radius, distributed forces normal to the contact surface and the changes in the volume of displacement from remote end, are calculated.(2) In the study on radial fretting, the case of a small ball subjecting to a radial force changing cyclically according to time is discussed. The contact status and contact stress distribution in the contact area are analyzed.(3) In the study on tortional fretting, the case of imposing a small angle displacement changing cyclically according to time is discussed, and the contact status, contact stress distribution and deformation are analyzed. And the results from numerical simulation are compared with that from experiment.