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A homogenized micro-elastohydrodynamic lubrication model: Accounting for non-negligible microscopic quantities

机译:一种均质微弹性动力学润滑模型:非可忽略的微观量计核算

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In rough elastohydrodynamic lubricated contacts the geometry often exhibits two clearly separated scales: a macroscopic scale -the one of the bearing- and a microscopic scale, that of the surface roughness. In numerical simulation of lubricated contacts, this difference in scales leads to large systems of equations to solve. Assuming periodicity or pseudo-periodicity of the small scale, several methods to decouple the macro scale from the micro scale have been proposed, the formal approach being the homogenization theory. However, the approximation errors due to the classical asymptotic assumptions can be considerable. In this work we introduce a homogenized model which takes into account the non-negligible pressures and deformations of the micro scale, thus extending the applicability of the classical asymptotic homogenized approaches.
机译:在粗糙的弹性流动动力学润滑触点中,几何形状通常具有两个明显的分离的尺度:宏观尺度 - 轴承和微观尺度之一,表面粗糙度的尺度。 在润滑触点的数值模拟中,尺度的这种差异导致旨在解决的大型方程系统。 假设小规模的周期性或伪周周期,提出了几种与微观规模分离的宏观量表的方法,正式的方法是均匀化理论。 然而,由于经典的渐近假设引起的近似误差可以是相当大的。 在这项工作中,我们引入了一种均质化模型,该模型考虑了微尺度的不可忽略的压力和变形,从而延长了经典渐近均质方法的适用性。

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