Imperial College London
Portrait Picture

Professor Rob Hewson

Faculty of Engineering, Department of Aeronautics

Professor of Multidisciplinary Design Optimisation
 
 
 
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Contact

 

r.hewson Website

 
 
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Location

 

341City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Gao:2018:10.1049/bsbt.2017.0003,
author = {Gao, L and Hua, Z and Hewson, R and Andersen, MS and Jin, Z},
doi = {10.1049/bsbt.2017.0003},
journal = {Biosurface and Biotribology},
pages = {18--23},
title = {Elastohydrodynamic lubrication and wear modelling of the knee joint replacements with surface topography},
url = {http://dx.doi.org/10.1049/bsbt.2017.0003},
volume = {4},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This numerical study predicted wear of lubricated total knee replacements with the existing of textured surface and the possibility of surface designs to reduce wear. In the first part, a wear model of metal-on-polyethylene total knee replacement was developed. The medial and lateral knee compartments was accounted for separately, with the contact force and motion during walking cycles applied. An adapted Archard wear formula was employed where the wear factor was an exponential function of the `Lambda ratio' (film thickness to the average roughness). Wear of the soft bearing surface (polyethylene insert) was simulated with regularly geometry update until a steady-state wear observed. In the second part, the effect of surface topography of the knee replacements was investigated. The surface texturing techniques have shown promising benefit to machine components in many areas of engineering practice. The texture parameters were designed using the Taguchi method for the geometry, size, and distribution of the micro dimples. It was observed that the lateral compartment may benefit from surface texturing if dimples were properly designed, while the texturing showed hardly advantageous effect on the medial surface in terms of lubrication enhancement and wear reduction. Some results were presented in the 6th World Tribology Conference.
AU  - Gao,L
AU  - Hua,Z
AU  - Hewson,R
AU  - Andersen,MS
AU  - Jin,Z
DO  - 10.1049/bsbt.2017.0003
EP  - 23
PY  - 2018///
SN  - 2405-4518
SP  - 18
TI  - Elastohydrodynamic lubrication and wear modelling of the knee joint replacements with surface topography
T2  - Biosurface and Biotribology
UR  - http://dx.doi.org/10.1049/bsbt.2017.0003
UR  - http://hdl.handle.net/10044/1/57372
VL  - 4
ER  -
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