薄膜润滑中的应力偶效应  

Effect of Couple Stress in Thin Film Lubrication

作　　者：张朝辉[1] 温诗铸[1] 雒建斌[1] 

机构地区：[1]清华大学摩擦学国家重点实验室,北京100084

出　　处：《摩擦学学报》2002年第6期486-489,共4页Tribology

基　　金：国家自然科学基金资助项目(59735110).

摘　　要：利用应力偶理论计算了薄膜润滑的膜厚特性.计算结果表明:应力偶的作用相当于增加润滑剂粘度,其可以增加油膜厚度,提高承载能力;同时应力偶作用依赖于油膜尺寸,润滑油膜越低,其影响越明显.The lubrication characteristics of thin film lubrication are analyzed by making use of couple stress theory. Computer simulation is carried out to investigate the relationship among the minimum film thickness and the operator parameters (velocity, load, viscosity etc). The simulation results reveal that the effect of the couple stress is equivalent to enhancing the lubricant viscosity, subsequently the film thickness is enlarged and hence the load carrying capacity increased. The effect of the couple stress in thin film lubrication depends on the film size. Namely, the thinner the lubricating film is, the more obvious the effect of the couple stress is.

关 键 词：薄膜润滑 应力偶效应 有序分子 润滑性能 

分 类 号：TH117.2[机械工程—机械设计及理论]