Influence of Roughness Parameters Skewness and Kurtosis on Fatigue Life Under Mixed Elastohydrodynamic Lubrication Point Contacts
Influence of Roughness Parameters Skewness and Kurtosis on Fatigue Life Under Mixed Elastohydrodynamic Lubrication Point Contacts
复制标题
混合弹流润滑点接触下粗糙度参数偏度和峰度对疲劳寿命的影响
DOI：
10.1115/1.4027480
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发表时间：
2014-07-01
影响因子：
2.5
通讯作者：
Zhang, Yu-Yan
中科院分区：
文献类型：
--
作者：
Yan, Xiao-Liang;Wang, Xiao-Li;Zhang, Yu-Yan
将混合弹流润滑条件下表面参数偏度和峰度对摩擦学特性影响的数值研究扩展到疲劳寿命。非高斯粗糙表面的数值生成与给定的自相关函数，偏度，峰度。结果表明，最大压力随偏度的增大而增大，但其峰度变化与偏度密切相关。对于最大von Mises应力，观察到与最大压力相似的趋势。疲劳寿命随偏度的增大而减小，但随峰度的增大而有明显的波动。随着峰度的增加，偏度对疲劳寿命的影响变得更加显著，反之亦然。
The numerical studies on the influences of surface parameters skewness and kurtosis on tribological characteristics under mixed elastohydrodynamic lubrication (mixed EHL) conditions are extended to fatigue life. Non-Gaussian rough surfaces are generated numerically with given autocorrelation function, skewness, and kurtosis. The results show that the maximum pressure increases as the skewness increases, however its variation with kurtosis is closely related to skewness. Similar trends to that of the maximum pressure are observed for the maximum von Mises stress. The fatigue life decreases as the skewness increases, however it undergoes apparent fluctuations with the increase of kurtosis. As the kurtosis increases, the influence of skewness on fatigue life becomes more significant, and vice versa.