抄録
Two-roller rolling-sliding contact fatigue tests are performed to evaluate the rolling contact fatigue strength of materials. Crowned rollers are sometimes used to achieve the high contact pressure and/or to avoid scoring. In this case, the change in the configuration of contact surface due to wear usually causes the change in contact pressure distribution. It makes the rolling contact fatigue strength evaluation difficult. In the present study, the relationship between the rolling contact fatigue strength and the contact pressure distribution at the end of test were examined by rolling contact fatigue tests and finite element analyses. Consequently, it was found that the position of the crack initiation coincides with that of the maximum contact pressure at the end of test and that the crack growth life would be related to the value of the maximum contact pressure.
