Effect of elastic deformation on lubrication characteristics in different clearances and head size of metallic artificial hip joint
The issue of lubrication in metallic artificial hip joints is discussed to prevent the two bearing surfaces from contacting each other. This study aims to analyse the characteristics of elastohydrodynamic lubrication (EHL) and investigate the effect of radial clearance and head size on the tribolo...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
SAGE Publications Ltd
2024
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| Online Access: | http://eprints.utem.edu.my/id/eprint/28245/2/00769090920241124121110.pdf http://eprints.utem.edu.my/id/eprint/28245/ https://journals.sagepub.com/doi/abs/10.1177/09544062241233926 https://doi.org/10.1177/09544062241233926 |
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| Summary: | The issue of lubrication in metallic artificial hip joints is discussed to prevent the two bearing surfaces from contacting
each other. This study aims to analyse the characteristics of elastohydrodynamic lubrication (EHL) and investigate the
effect of radial clearance and head size on the tribological performance of metallic artificial hip joints under steady-state
conditions using the Fluid-Structure-Interaction (FSI) method. The average load in the z-direction and flexion-extension
motion around the y-axis were used to represent normal walking. This study demonstrates that the film thickness
profile from the validation study aligns with the findings of the previous study. The contour of the fluid pressure in the
central contact zone changes with different time steps – the direction of fluid movement corresponds to the solid-fluid
reaction. Additionally, the deformation of the cup surfaces contributes to the continuous fluid film that separates the
contact surfaces. Furthermore, design parameters also influence EHL performance. It has been discovered that less
radial clearance and a larger head size led to an increase in fluid film thickness |
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