Surface initiated rolling contact fatigue based on the asperity point load mechanism-A parameter study

► For a gear design, vital parameters were found for improved rolling contact fatigue resistance. ► The parametric design study included effects of four contact parameters on rolling contact fatigue. ► Of the parameters, asperity height and friction had the largest effect on fatigue initiation risk. ► The results supported asperity point loads as source for surface started rolling contact fatigue. ► The asperity point load model was extended to include cylindrical contact friction.