Regimes of Traction in Elastohydrodynamic Lubrication
Regimes of Traction in Elastohydrodynamic Lubrication
复制标题
弹流润滑中的牵引状态
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
K L Johnson
中科院分区：
文献类型：
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作者：
C. Evans;K L Johnson
润滑剂在弹流接触中的流变性取决于流体的性质以及载荷、速度和温度的施加条件。对于已知流变性的润滑剂，它显示了如何构建一个MAP，其中MAP的不同区域对应于不同的行为模式。为地图选择的坐标是无量纲压力和与薄膜厚度密切相关的参数。在给定负载、速度和温度的情况下，运行条件可以作为地图上的一个点来定位。绘制了三种液体的地图：矿物油、聚苯醚5P4E和牵引液。总体而言，这些映射显示了四个区域：(A)牛顿、(B)Eyring、(C)粘弹性和(D)弹塑性。对于每一种状态，提出了合适的本构方程，由此可以预测牵引力。用这种方法计算的最大牵引力系数得到了实验的很好支持。
The rheological behaviour of the lubricant in an elastohydrodynamic contact depends upon the properties of the fluid and the imposed conditions of load, speed and temperature. For a lubricant of known rheological properties, it is shown how a ‘map’ can be constructed in which different areas of the map correspond to different regimes of behaviour. The coordinates chosen for the map are non-dimensional pressure and a parameter which is closely related to the film thickness. Given the load, speed and temperature, the operating conditions can be located as a point in the map. Maps have been constructed for three fluids: a mineral oil, polyphenyl ether 5P4E and a traction fluid. In general the maps display four regimes: (a) Newtonian, (b) Eyring, (c) viscoelastic and (d) elastic-plastic. Appropriate constitutive equations are proposed for each regime from which the traction forces can be predicted. The maximum traction coefficients calculated in this way are well supported by experiment.