Contact mechanics and lubrication analyses of ceramic-on-metal total hip replacements |
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| Affiliation: | 1. The Ohio State University, 395 Dreese Lab, 2015 Neil Ave, Columbus, OH 43210, USA;2. Hewlett Packard Labs;3. Hewlett Packard Enterprise;4. HP Inc.;1. Doctoral student at Department of Mechanical Engineering, Diponegoro University, Semarang, Indonesia;2. Department of Mechanical Engineering, Universitas Muria Kudus, Kudus, Indonesia;3. Department of Mechanical Engineering, Diponegoro University, Semarang, Indonesia;4. Department of Mechanical Engineering, Semarang State Polytechnic, Semarang, Indonesia |
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| Abstract: | Ceramic-on-metal (CoM) total hip replacements have shown reduced wear and friction. Lubrication and contact mechanics analyses play an important role in providing an overall understanding for the tribological performance of CoM bearings. In the present study, the steady-state contact mechanics and elastohydrodynamic lubrication (EHL) and transient EHL of CoM bearings were analyzed. The dry and lubricated contact pressures of CoM bearings showed typical characteristics of hard-on-hard hip bearings. The effects of head radius and radial clearance on the lubrication performance were predicted. CoC and CoM bearings are more likely to benefit full fluid film lubrication than MoM bearings. |
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