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Effects of surface forces on pure squeeze thin film EHL motion of circular contacts |
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| Authors: | Li-Ming Chu Chi-Hui Chien |
| Affiliation: | a Department of Mechanical and Automation Engineering, I-Shou University, Kaohsiung County 840, Taiwan, ROC b Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan, ROC c Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University, No. 1 University Road, Tainan 701, Taiwan, ROC |
| Abstract: | The pure squeeze thin film elastohydrodynamic lubrication (thin film EHL) motion of circular contacts with effects of surface forces taken into account is explored under constant load conditions. The difference between thin film EHL model and EHL model is apparent as the film thickness is thinner than 5 nm. The oscillation phenomena in pressure and film thickness come mainly from the action of solvation forces. The effects of surface forces become significant as the film thickness becomes thinner. Moreover, the viscosity is oscillatory due to its dependency on the hydrodynamic pressure which is affected by surface forces. |
| Keywords: | Thin film elastohydrodynamic lubrication Squeeze film Surface force |
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