An Approach for Subsurface Rolling Contact Fatigue Damage Assessment of Backup Roll Material

Abstract

This paper proposed an approach for the subsurface rolling contact fatigue damage assessment of the component operated under rolling contact conditions. The maximum range of orthogonal shear stress was selected as the critical stress controlling subsurface rolling contact fatigue damage. The distribution of the maximum range of orthogonal shear stress combined with the S–N curve of materials tested was used to compute the subsurface rolling contact fatigue damage. The distribution of subsurface rolling contact fatigue damage computed by theoretical model proposed was validated by the statistical analysis result of hardness test on the rolling contact fatigue test samples and distribution of the pole figure’s peak intensity tested by X-ray diffraction method in one of the reference article. The theoretical results agree well with that subsurface rolling contact fatigue damage evaluation characterized by hardness and X-ray diffraction.