Lu, X, Meng, Q orcid.org/0000-0002-6708-5585 and Jin, Z (2021) Effects of UHMWPE viscoelasticity on the squeeze-film lubrication of hip replacements. Biosurface and Biotribology, 7 (2). pp. 60-69. ISSN 2405-4518
Abstract
Many studies have been performed to analyse the lubrication of artificial joints since the pioneer work by the late Professor Duncan Dowson. However, the viscoelastic deformation of one of the most widely used bearing materials, ultra-high-molecular-weight polyethylene (UHMWPE), has only been considered recently. The described study attempted to investigate the effect of UHMWPE viscoelasticity on the elastohydrodynamic lubrication of such a soft artificial hip replacement under squeeze-film motion. A transient viscoelastic squeeze-film lubrication model of a typical hip implant was developed and solved to obtain the film thickness and pressure distributions. A boundary film thickness was adopted to consider the direct and indirect lubricant contact conditions. The results showed that the viscoelasticity had marked effects on the squeeze-film lubrication performance of UHMWPE artificial hip joints. The minimum film thickness in the viscoelastic model was smaller than that of the elastic model, causing an earlier direct contact. However, the film thickness within the central contact region in the viscoelastic model was greater than that of the elastic model due to the restricted flow of the lubricant, therefore enhancing the lubricating effect and particularly with a short relaxation time and mechanical loss factor.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 The Authors. Biosurface and Biotribology published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology and Southwest Jiaotong University. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Medical and Biological Engineering (iMBE) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 02 Jul 2021 09:28 |
Last Modified: | 02 Jul 2021 09:28 |
Status: | Published |
Publisher: | Wiley Open Access |
Identification Number: | 10.1049/bsb2.12006 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:175798 |