Analysis of Contact Characteristics of Rough Surface/Microporous For Flat Friction Pair

Abstract

The rough surface has serious friction, wear and thermal damage during the sliding friction process in engineering applications, which leads to the failure of the friction pair. The rough surface contact is simplified into a rough surface with fractal properties and an ideal plane. The interaction between the asperities of the contacting body and the coupling effect of frictional heat flow at the frictional interface is considered. The impact of contact pressure and temperature rise between microporous model and non porous model on rough surface was compared, as well as the impact of Sa on the area, contact pressure and temperature rise of the friction pair. The results show that in the process of uniform sliding friction, when the asperities pass through the micropores, the asperities are embedded in the edge of the micropores so that the peak contact pressure increases, cutting occurs, and the deformation is affected by the interaction between the micropores and the asperities. The position of the highest pressure point is not fixed due to the deformation of the asperity, which improves the force of the asperity, and the micro-hole reduces the contact zone, thereby reducing the contact of the asperity and the pressure extreme point and reducing the pressure.Micropores reduce the temperature and enhance the wear condition of the end face. Small surface roughness can decrease the risk of end face wear.