文章基本信息

标题：The effects of couple stress lubricants and surface roughness on squeeze EHL motion between porous medium layer and elastic ball
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作者：Li-Ming Chu ; Cai-Wan Chang-Jian ; Hsiang-Chen Hsu 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2022
卷号：14
期号：6
页码：1-9
DOI：10.1177/16878132221099812
语种：English
出版社：Sage Publications Ltd.
摘要：This paper investigated the effects of porous media layer (PML) and couple stress (CS) lubricants at pure squeeze action in an isothermal elastohydrodynamic lubrication (EHL) point contact with surface roughness (SRN) under constant load condition. The modified transient stochastic Reynolds equation was derived in polar coordinates by means of the Christensen’s stochastic theory and the Stokes’s CS fluid theory. The Gauss-Seidel method (GSM) and the finite difference method (FDM) were both used to solve simultaneously modified transient stochastic Reynolds, force equilibrium, elasticity deformation, and rheology equations. The simulation results revealed that the greater permeability (K) and porous layer thickness (Φ) are, the smaller central pressures (Pc) are, and the smaller film thicknesses (H) are. The times required for achieving maximum central pressures (Pcmax) decrease with increasing K and Φ. Due to squeeze and elastic deformation effects, the slope values of central velocity (Vc) change from negative to positive. The magnitude of Vc and Vmin decreased with decreasing K and Φ. The Hcmin of circular type RN are greater than that of radial type RN. The Pcmax of radial type RN are slightly greater than that of circular type RN.
关键词：Surface roughness;porous medium layer;couple stress lubricants;EHL;transient Squeeze