Influence of anisotropic surface roughness on lubricated rubber friction with application to hydraulic seals
Influence of anisotropic surface roughness on lubricated rubber friction with application to hydraulic seals
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各向异性表面粗糙度对润滑橡胶摩擦的影响及其应用于液压密封件
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
B. Persson
中科院分区：
文献类型：
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作者：
M. Scaraggi;J. Angerhausen;L. Dorogin;H. Murrenhoff;B. Persson
机械零件和机械部件的表面通常具有各向异性粗糙度，这可能是由于机械加工过程(如磨削)或磨损造成的。因此，重要的是要了解表面粗糙度各向异性如何影响接触力学性能，如摩擦和界面分离，这对润滑接触非常重要。在这里，我们推广并应用多尺度平均场模型来研究软(例如橡胶)弹性固体和刚性对接表面之间的润滑接触。我们考虑了具有各向异性表面粗糙度的表面，并讨论了流体流动因子和摩擦因子如何依赖于粗糙度。本文对丁腈橡胶O形圈与不同类型各向同性和各向异性表面粗糙度的钢表面之间的润滑滑动接触进行了实验研究。实验结果与理论预测的较好的定量对比表明，理论准确地捕捉到了多尺度润滑机理。
Machine elements and mechanical components have often surfaces with anisotropic roughness, which may result from the machining processes, e.g. grinding, or from wear. Hence, it is important to understand how surface roughness anisotropy affects contact mechanics properties, such as friction and the interface separation, which is important for lubricated contacts. Here we extend and apply a multiscale mean-field model to the lubricated contact between a soft (e.g. rubber) elastic solid and a rigid countersurface. We consider surfaces with anisotropic surface roughness, and discuss how the fluid flow factors and friction factors depend on the roughness. We present an experimental study of the lubricated sliding contact between a nitrile butadiene rubber O-ring and steel surfaces with different types of isotropic and anisotropic surface roughness. The good quantitative comparison between the experimental results and the theory predictions suggests that the multiscale lubrication mechanisms are accurately captured by the theory.