Abstract
Wet friction materials are required to have long compression fatigue life, because they are used as wet clutches for transmitting and cutting off power repeatedly in automatic transmissions. In this study, it was found that the strength of wet friction materials decreased during compression fatigue testing because of the growth of their pore size. It was also observed that fatigue life differed depending on the fluid used, but that the deformation level at the time of failure was equal for various types of fluid.
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