Analysis of mixed lubrication mechanism in metal-on-metal hip joint replacements |
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Authors: | Jin Z M |
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Affiliation: | Department of Mechanical and Medical Engineering, University of Bradford, UK. |
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Abstract: | A simple mixed lubrication model has been developed to predict the asperity contact and wear for the metal-on-metal bearing couple for total hip joint replacements. It has been shown that the femoral head radius has a large effect on the predicted asperity contact and wear depending on the lubrication regime. An increase in the femoral head radius can lead to an increase in wear under a predominantly boundary lubrication regime, but this trend can be reversed under a mixed lubrication regime towards fluid film lubrication. These observations are consistent with the recent experimental findings from hip simulator studies by Smith and co-workers. |
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