Towards the direct validation of computational lubrication modelling of hip replacements
| Autor: | Qingen Meng, Xianjiu Lu, Martin Hartl, David Rebenda, Martin Vrbka, Zhongmin Jin, D. Nečas |
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| Rok vydání: | 2020 |
| Předmět: |
Computational model
Bearing (mechanical) Materials science Mechanical Engineering 02 engineering and technology Surfaces and Interfaces Mechanics 021001 nanoscience & nanotechnology Surfaces Coatings and Films law.invention Viscosity 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials law Lubrication medicine Transient (oscillation) Lubricant Viscosity solution 0210 nano-technology Mineral oil medicine.drug |
| Zdroj: | Tribology International. 146:106240 |
| ISSN: | 0301-679X |
| DOI: | 10.1016/j.triboint.2020.106240 |
| Popis: | This study attempted to provide insights into validating computational lubrication modelling of hip replacements. Direct comparisons between experimental measurements and numerical simulations were conducted for the central film thickness in a CoCr-on-glass hip bearing pair. A low-viscosity mineral oil and a 25% bovine serum were used as lubricants, respectively. Results indicated that for the low-viscosity lubricant case, the film thicknesses predicted by the computational model were comparable to the experimental measurements. For the bovine serum case, the computational results did not agree with those measured by experiments due to the viscosity model adopted in the computational models. A new effective viscosity equation was proposed to accurately predict the lubrication performance of hip replacements for protein-containing lubricants under transient conditions. |
| Databáze: | OpenAIRE |
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