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Influences of solid and lubricant thermal conductivity on traction in an EHL circular contact
Tribology International ( IF 4.271 ) Pub Date : 2019-11-03 , DOI: 10.1016/j.triboint.2019.106059
H.C. Liu, B.B. Zhang, N. Bader, G. Poll, C.H. Venner

The influences of thermal conductivity of both the contacting solids and the lubricant on the traction in a rolling/sliding EHL contact have been studied numerically. For through-hardened AISI 52100 bearing steel (k was measured as 21W/mK by Reddyhoff et al. see Tribol Lett 67(1):22, 2019), with the improper but widely used thermal conductivity of 46W/mK in literature, the friction coefficient can be overestimated and the maximum temperature in the lubricating film would be underestimated. The effect of solid thermal conductivity on traction depends on the entrainment speed and the resulting film thickness. For the thermal conductivity of the lubricant, its pressure dependence affects the traction mainly at high speeds and/or at high sliding-to-rolling ratio (SRR) conditions.

更新日期:2019-11-03

 

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