Prediction of microgeometrical influences on micropitting fatigue damage on 32CrMoV13 steelReport as inadecuate




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1 MSMP - Mechanics surfaces and materials processing 2 Cardiff School of Engineering Cardiff

Abstract : Micropitting is a form of surface fatigue damage that occurs in the gear teeth. It is due to the effect of variation in the mechanical loading in the contact zone between the two teeth, induced especially by flank roughness. In this study, generic roughness profiles were built with geometrical parameters to simulate the contact between two rough surfaces. Using elastohydrodynamic lubrication code and Crossland-s fatigue criteria, the influence on fatigue lifetime was analysed for changes in each parameter. The relevant parameters were determined that influencei the conventional pitting,ii the extent to which the von Mises equivalent stress exceeds the material yield stress in the zone where micropitting occurs, andiii the fatigue lifetime for steel teeth. With nitriding benefits, the same trends were shown with weaker effects.

keyword : Micropitting Fatigue damage Microgeometry Gear





Author: Agnes Fabre - H. Evans - Laurent Barrallier - K. J. H. Sharif - M. Desvignes -

Source: https://hal.archives-ouvertes.fr/



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