Abstract
In recent years, there has been a growing interest in environmental issues, accordingly, energy saving have been promoted in various fields. For example, automobile has progressed lower viscosity of the engine oil for the purpose of improving fuel economy. As a result, more opportunities to be used in the boundary lubrication state, reduction in life of the bearing has become a serious problem. In this paper, about peeling damage that occurs at the boundary lubrication state of the rolling bearing, the effect of the surface roughness was experimentally investigated by twin-disk tribometer test. In addition, we were investigated the change in contact pressure due to the difference of contact angle between asperity of roughness and spherical surface by finite element analysis. Consequently, contact pressure was hardly changed by the angle of asperity in the surface roughness, however, it was found that higher contact pressure is applied to a smooth surface rather than a rough surface.
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