The Influence of Surface Topography on Energy Dissipation and Compliance in Tangentially Loaded Elastic Contacts
The Influence of Surface Topography on Energy Dissipation and Compliance in Tangentially Loaded Elastic Contacts
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DOI：
10.1115/1.4005641
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发表时间：
2012
影响因子：
2.5
通讯作者：
S. Medina;A. Olver;D. Dini
中科院分区：
文献类型：
--
作者：
S. Medina;A. Olver;D. Dini
研究了非高斯表面粗糙度对法向和切向载荷弹性接触的影响。数值求解方法的基础上的多级计划，并结合Ciavarella/Jaeger定理已实施，它允许快速计算部分滑移加载条件，包括能量耗散的完全反向切向加载循环。不同的粗糙度均方根值，偏度，峰度，和相关长度的接触面积，刚度值和能量耗散的影响，这些参数和加载方法的意义进行了讨论。结果发现，能量耗散可以大大增加较大的表面粗糙度。地图显示如何在接触内的能量耗散分布，这提供了一些解释这种观察和散射，可能会发生表面名义上类似的粗糙度。这些参数的适用性预测粗糙表面的接触行为也被考虑。
The influence of non-Gaussian surface roughness on elastic contacts loaded in both normal and tangential directions has been investigated. A numerical solution method based on the multilevel scheme and incorporating the theorem of Ciavarella/Jaeger has been implemented, which allows fast calculation of partial slip loading conditions, including the energy dissipation for a fully reversed tangential loading cycle. The effect of varying roughness rms, skewness, kurtosis, and correlation lengths on contact areas, stiffness values, and energy dissipation is presented, and the significance of these parameters and of the loading method are discussed. It was found that the energy dissipation can be greatly increased by greater surface roughness. Maps showing how the energy dissipation is distributed within the contact are presented, which provide some explanation for this observation and the scatter that may occur for surfaces of nominally similar roughness. The suitability of these parameters for predicting the contact behavior of rough surfaces is also considered.