The effects of contact area and contact stress on friction and wear of polyethylene-metal articulation were evaluated using a bi-directional pin-on-disk apparatus. A doubling of the contact area under fixed loading conditions led to a 50% increase in the coefficient of friction and a doubling of the wear rate. There appeared to be a relationship between the increase in wear rate and the increase in the coefficient of friction. A model was developed to explain the mechanism by which engagement of asperities results in the increasing wear rate with increasing contact area despite the decreased stress.
- Tribology Division
Contact Area as a Critical Determinant in the Tribology of Metal-on-Polyethylene Total Joint Arthroplasty
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Mazzucco, D, & Spector, M. "Contact Area as a Critical Determinant in the Tribology of Metal-on-Polyethylene Total Joint Arthroplasty." Proceedings of the ASME/STLE 2004 International Joint Tribology Conference. ASME/STLE 2004 International Joint Tribology Conference, Parts A and B. Long Beach, California, USA. October 24–27, 2004. pp. 1715-1725. ASME. https://doi.org/10.1115/TRIB2004-64166
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