Prediction of microgeometrical influences on micropitting fatigue damage on 32CrMoV13 steel
Prediction of microgeometrical influences on micropitting fatigue damage on 32CrMoV13 steel
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DOI：
10.1016/j.triboint.2012.07.018
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发表时间：
2013-03
影响因子：
6.2
通讯作者：
A. Fabre;H. P. Evans;L. Barrallier;K. Sharif;M. Desvignes
中科院分区：
文献类型：
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作者：
A. Fabre;H. P. Evans;L. Barrallier;K. Sharif;M. Desvignes
微点蚀是发生在齿轮齿上的一种表面疲劳损伤。这是由于在两个齿之间的接触区，特别是由侧面粗糙度引起的机械载荷变化的影响。在这项研究中，建立了具有几何参数的通用粗糙度曲线来模拟两个粗糙表面之间的接触。采用弹流润滑规范和Crossland疲劳准则，分析了各参数的变化对疲劳寿命的影响。确定了影响(i)常规点蚀的相关参数，（ii）在发生微点蚀的区域，von Mises等效应力超过材料屈服应力的程度，以及（iii）钢齿的疲劳寿命。对于氮化的好处，同样的趋势显示出较弱的影响。
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.