Publication detail

Quantitative elastohydrodynamic film forming for a gear oil with complex shear-thinning

BAIR, S. HABCHI, W. SPERKA, P. HARTL, M.

Original Title

Quantitative elastohydrodynamic film forming for a gear oil with complex shear-thinning

Type

journal article in Web of Science

Language

English

Original Abstract

Perhaps the most thorough characterization of the elevated pressure properties of any commercial EHL lubricant is presented here for a gear oil. Compressibility, thermal conductivity, and low-shear viscosity were measured. Of particular interest is the shear dependence of viscosity, measured across four decades of stress, which shows two transitions each with a specific value of power-law exponent. An attempt to capture a suspected third transition at very high stress resulted in mechanical degradation of the liquid in the viscometer. Numerical simulations of a point contact between a steel ball and a glass disc showed good agreement over a range of slide-to-roll ratio for the measured central thickness. The agreement for the minimum thickness was excellent. A new result is that shear-thinning of a higher molecular weight component that occurs from 3 to 200 kPa had little effect on the film thickness and could therefore be neglected in a film thickness calculation.

Keywords

elastohydrodynamic film thickness, elastohydrodynamic lubrication, rheology, shear-thinning, compressibility

Authors

BAIR, S.; HABCHI, W.; SPERKA, P.; HARTL, M.

Released

31. 3. 2016

Publisher

SAGE Publications

ISBN

1350-6501

Periodical

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY

Year of study

230

Number

3

State

United Kingdom of Great Britain and Northern Ireland

Pages from

289

Pages to

299

Pages count

11

URL

http://journals.sagepub.com/doi/abs/10.1177/1350650115600185

BibTex

@article{BUT134841,
  author="BAIR, S. and HABCHI, W. and SPERKA, P. and HARTL, M.",
  title="Quantitative elastohydrodynamic film forming for a gear oil with complex shear-thinning",
  journal="PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY",
  year="2016",
  volume="230",
  number="3",
  pages="289--299",
  doi="10.1177/1350650115600185",
  issn="1350-6501",
  url="http://journals.sagepub.com/doi/abs/10.1177/1350650115600185"
}