Journal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
Volume 235, Issue 4, Pages 786-797Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1350650120927559
Keywords
Mixed-lubrication regime; nano-lubricant; EHL line contact; load-sharing concept
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Funding
- Iran National Science Foundation (INSF)
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The study aims to investigate the impact of nano-particles' weight fraction on the friction coefficient in mixed-lubrication regime through experimental and theoretical analysis. Results demonstrate good agreement between theoretical and experimental findings, with a parametric study conducted to explore additional influencing factors.
The main goal of this study is to present a model to investigate the effect of nano-particles' weight fraction on the friction coefficient of rough contact in the mixed-lubrication regime. Experimental testing involves pin-on-disk measurements of the friction coefficient with CuO nano-particles added to engine oil. Theoretical analyses involve developing a method for treating an EHL line contact with provision for surface roughness that takes into account the load-carrying capacity of surface asperities, lubricant, and nano-particles. Results show that theoretical and experimental results for friction coefficients are in good agreement. A parametric study is conducted to investigate effect of load, the geometry of the nano-particles, and their mechanical properties as well as their weight fraction on the friction coefficient.
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