Publication detail

Viscoelastic response of lubricant in an EHL contact under transient bi-directional shear loading

FRÝZA, J. ŠPERKA, P. KŘUPKA, I. HARTL, M.

Original Title

Viscoelastic response of lubricant in an EHL contact under transient bi-directional shear loading

Type

miscellaneous

Language

English

Original Abstract

There is currently great interest in the understanding of physical origins of friction in elastohydrodynamically lubricated (EHL) contacts of machine components, especially those operating under severe conditions. In such contacts, elastohydrodynamic friction is determined almost entirely by a non-Newtonian response of highly pressurized lubricant in the central area of the contact. Moreover, all of the contacts are affected by vibrations and the lubricant film is subjected to transient shear stress. In the current experimental study, an EHL point contact was exposed to steady-state sliding motion in one direction simultaneously with harmonic sliding motion in a perpendicular direction. Friction forces were measured in the both directions of contact by precise load cells. Results of this study indicate the response of viscoelastic behavior of lubricant to transient bi-directional shear loading and they are confronted with the limiting shear stress phenomenon.

Keywords

Elastohydrodynamic lubrication; Traction; Shear strength; Viscoelasticity;

Authors

FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Released

21. 5. 2017

Publisher

Society of Tribologists and Lubrication Engineers

Location

Atlanta, Georgia, USA

Pages count

1

URL

https://www.stle.org/images/pdf/STLE_ORG/AM/2017/Program/STLE_Advanced_Program.pdf

BibTex

@misc{BUT137400,
  author="Josef {Frýza} and Petr {Šperka} and Ivan {Křupka} and Martin {Hartl}",
  title="Viscoelastic response of lubricant in an EHL contact under transient bi-directional shear loading",
  year="2017",
  pages="1",
  publisher="Society of Tribologists and Lubrication Engineers",
  address="Atlanta, Georgia, USA",
  url="https://www.stle.org/images/pdf/STLE_ORG/AM/2017/Program/STLE_Advanced_Program.pdf",
  note="miscellaneous"
}