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首页> 外文期刊>ISRN Mechanical Engineering >Effect of Surface Roughness and Couple Stresses on Squeeze Films between Curved Annular Plates
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Effect of Surface Roughness and Couple Stresses on Squeeze Films between Curved Annular Plates

机译：表面粗糙度和耦合应力对弯曲环形板之间挤压膜的影响

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The combined effects of couple stresses and surface roughness patterns on the squeeze film characteristics of curved annular plates are studied. The Stokes (1966) couple stress fluid model is included to account for the couple stresses arising due to the presence of microstructure additives in the lubricant. In the context of Christensen's (1969) stochastic theory for the lubrication of rough surfaces, two types of one-dimensional roughness patterns (circumferential and radial) are considered. The governing modified stochastic Reynolds type equations are derived for these roughness patterns. Expressions for the mean squeeze film characteristics are obtained. Numerical computations of the results show that the circumferential roughness pattern on the curved annular plate results in more pressure buildup whereas performance of the squeeze film suffers due to the radial roughness pattern for both concave and convex pads. Further the squeeze film time is longer (shorter) for the circumferential (radial) roughness patterns. Improved squeeze film characteristics are predicted for the couple stress lubricant.
机译：研究了耦合应力和表面粗糙度对弯曲环形板挤压膜特性的综合影响。包括Stokes（1966）耦合应力流体模型，以说明由于润滑剂中存在微结构添加剂而引起的耦合应力。在克里斯滕森（1969）的用于粗糙表面润滑的随机理论的背景下，考虑了两种类型的一维粗糙度模式（周向和径向）。对于这些粗糙度模式，得出了控制的修正的随机雷诺型方程。获得平均挤压膜特性的表达式。结果的数值计算表明，弯曲的环形板上的周向粗糙度图案导致更多的压力累积，而挤压膜的性能由于凹面和凸面垫的径向粗糙度图案而受到影响。此外，对于周向（径向）粗糙度图案，挤压膜时间更长（更短）。预测偶合应力润滑剂会改善挤压膜的特性。

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