A quantitative solution for the full shear-thinning EHL point contact problem including traction

Yuchuan Liu*, Scott Bair, Q. Jane Wang, Philippe Vergne

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present a realistic elastohydrodynamic lubrication (EHL) simulation in point contact using a Carreau-like model for the shear-thinning response and the Doolittle-Tait free-volume viscosity model for the piezoviscous response. The liquid is a high viscosity polyalphaolefin which possesses a relatively low threshold for shear-thinning. As a result, the measured EHL film thickness is about one-half of the Newtonian prediction. We derived and numerically solved the two-dimensional generalized Reynolds equation for the modified Carreau model based on Greenwood [1]. Departing from many previous solutions, the viscosity models used for the pressure and shear dependence were obtained entirely from viscometer measurements. Truly remarkable agreement is found in the comparisons of simulation and experiment for traction coefficient and for film thickness in both pure rolling and sliding cases. This agreement validates the use of a generalized Newtonian model in EHL.

Original languageEnglish (US)
Title of host publication2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007
Pages1031-1032
Number of pages2
DOIs
StatePublished - May 19 2008
Event2007 ASME/STLE International Joint Tribology Conference, IJTC 2007 - San Diego, CA, United States
Duration: Oct 22 2007Oct 24 2007

Publication series

Name2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007
VolumePART B

Other

Other2007 ASME/STLE International Joint Tribology Conference, IJTC 2007
CountryUnited States
CitySan Diego, CA
Period10/22/0710/24/07

ASJC Scopus subject areas

  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Fingerprint Dive into the research topics of 'A quantitative solution for the full shear-thinning EHL point contact problem including traction'. Together they form a unique fingerprint.

  • Cite this

    Liu, Y., Bair, S., Wang, Q. J., & Vergne, P. (2008). A quantitative solution for the full shear-thinning EHL point contact problem including traction. In 2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007 (pp. 1031-1032). (2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007; Vol. PART B). https://doi.org/10.1115/IJTC2007-44100