Journal
TRIBOLOGY INTERNATIONAL
Volume 59, Issue -, Pages 129-140Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2012.07.018
Keywords
Micropitting; Fatigue damage; Microgeometry; Gear
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Funding
- M2P department of Arts et Metiers ParisTech
- Arts et Metiers ParisTech-Aix en Provence
- MecaSurf laboratory
- UK Engineering & Physical Sciences Research Council (EPSRC) [EP/G06024X/1]
- Engineering and Physical Sciences Research Council [EP/G06024X/1] Funding Source: researchfish
- EPSRC [EP/G06024X/1] Funding Source: UKRI
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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 influence (i) the conventional pitting, (ii) the extent to which the von Mises equivalent stress exceeds the material yield stress in the zone where micropitting occurs, and (iii) the fatigue lifetime for steel teeth. With nitriding benefits, the same trends were shown with weaker effects. (C) 2012 Elsevier Ltd. All rights reserved.
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