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A Deterministic Multiscale Method Modeling Surface Texturing Effects in Hydrodynamic Lubrication Regime

机译:一种确定性多尺度方法在流体动力润滑制度中建模表面纹理效果

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Surface texture as a means for enhancing tribological properties has been proven to be very efficient in boundary, mixed and full lubrication, reducing the friction coefficient and the wear rate of mating surfaces. The contacting surface is often composed of hundreds even ten thousands textures, so the macroscopic statistics of the contacting surface, such as load capacity or friction, is determined by the cumulative effect of massive textures, while the microscopic boundary conditions of the textures is directly affected by the macroscopic working conditions. Therefore, the macroscopic and microscopic conditions interact with each other. It is not a trivial task to determine the pressure distribution for multiscale texturing surface in full lubrication. However, many theoretical studies on textures often only took out one or several units [1-3] from the pattern distributed textures for period analysis. Nevertheless, these approaches ignore the macroscopic and microscopic interaction and cannot apply the real boundary conditions, which results in improper results. In addition, in order to ensure the accuracy of computational results and the detailed expression of the texture geometry, every texture needs intensive mesh grids, which leads to extraordinary number of grids. Consequently, it is almost impossible for the traditional numerical methods, such as finite element or finite difference methods, to solve the multiscale problem. Therefore, it is important to develop an efficient method for the multiscale problem, which will be helpful to study the texturing hydrodynamic lubrication in multiscale level.
机译:已经证明,作为提高摩擦学特性的方法的表面纹理在边界,混合和完全润滑中,降低了交配表面的摩擦系数和磨损率。接触表面通常由数百个纹理组成,因此通过巨大纹理的累积效应来确定接触表面的宏观统计,例如负载能力或摩擦,而纹理的显微边界条件是直接影响的通过宏观工作条件。因此,宏观和微观条件彼此相互作用。确定全润滑中多尺度纹理表面的压力分布不是一种琐碎的任务。然而,许多关于纹理的理论研究通常只取出一个或多个单位[1-3]从模式分布式纹理进行期间分析。然而,这些方法忽略了宏观和微观相互作用,不能应用真实的边界条件,这导致结果不当。另外,为了确保计算结果的准确性和纹理几何形式的详细表达,每个纹理都需要强化网格网格,这导致了非凡的网格数。因此,传统的数值方法几乎不可能解决有限元或有限差分方法来解决多尺度问题。因此,重要的是要为多尺度问题开发一种有效的方法,这将有助于研究多尺度水平的纹理水动力润滑。

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