Nano-lubricant film formation due to combined elastohydrodynamic and surface force action under isothermal conditions
Nano-lubricant film formation due to combined elastohydrodynamic and surface force action under isothermal conditions
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等温条件下弹流体动力和表面力的共同作用形成纳米润滑膜
DOI：
10.1177/095440620121500902
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
H. Rahnejat
中科院分区：
文献类型：
--
作者：
M. F. Abd;H. Rahnejat
本文给出了等温条件下集中反形点接触润滑油膜厚度和压力分布的数值预测结果。包括夹带运动的载荷和速度的操作条件促进超薄膜的形成;这些超薄膜是在弹性流体动力润滑（EHL）、溶剂化的表面接触力和由于货车范德华力的存在而引起的分子相互作用的联合作用下形成的。采用低松弛Newton-Raphson迭代技术，对动水压力的收敛性进行了数值求解。本文表明，表面力的影响变得显着的弹性膜（即差距）减少到几个纳米。数值计算结果与其他研究者的数值计算结果和实验结果吻合得很好。
Abstract This paper presents the results of numerical prediction of the lubricant film thickness and pressure distribution in concentrated counterformal point contact under isothermal conditions. The operating conditions, which include load and speed of entraining motion, promote the formation of ultra-thin films; these are formed under the combined action of elastohydrodynamic lubrication (EHL), the surface contact force of solvation and molecular interactions due to the presence of Van der Waals forces. A numerical solution has been carried out, using the low-relaxation Newton-Raphson iteration technique, applied to the convergence of the hydrodynamic pressure. The paper shows that the effect of surface forces become significant as the elastic film (i.e. the gap) is reduced to a few nanometres. The numerical predictions have been shown to conform well to the numerical work and experimental findings of other research workers.