The role of fragility in EHL entrapment |
| |
| Authors: | Ashlie Martini Scott Bair |
| |
| Affiliation: | 1. Purdue University, School of Mechanical Engineering, 585 Purdue Mall, West Lafayette, IN 47907, USA;2. Georgia Institute of Technology, Center for High-Pressure Rheology, George W. Woodruff School of Mechanical Engineering, Atlanta, GA, USA;1. School of Engineering and Computing Sciences, South Road, Durham DH1 3LE, UK;2. Centro Universitario de la Defensa, Zaragoza 50090, Spain;1. Brno University of Technology, Faculty of Mechanical Engineering, Technicka 2896/2, 61669 Brno, Czech Republic;2. Qingdao Technological University, School of Mechanical Engineering, Qingdao 266033, PR China;1. Theory of Lubrication and Bearing Institute, Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi''an Jiaotong University, Xi''an, China;2. Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China;1. DIEF – Department of Engineering ‘Enzo Ferrari’, University of Modena and Reggio Emilia, via Vignolese, 905/b, 41125 Modena, Italy;2. Department of Mechanical Engineering, Imperial College London, South Kensington Campus, Exhibition Road, SW7 2AZ, London, UK |
| |
| Abstract: | Experimental measurements of time dependent film thickness in entrapped liquids, measurements of viscosity under pressure, and simulations using realistic pressure–viscosity models contribute to improved understanding of the mechanisms of entrapment formation and persistence. The ambient viscosity and pressure–viscosity coefficient affect entrapment only as much as they are predictors of behavior at much higher pressure. Fragile liquids, such as lubricating oils, experience rapid increase in sensitivity of dynamic properties to temperature and pressure as the glass transition is approached. The fragility property of lubricants appears to be of overwhelming importance to entrapment which experimental evidence indicates will reduce starting friction. |
| |
| Keywords: | Elastohydrodynamic lubrication Lubricant rheology |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
