Publication result detail

Mechanical Degradation of the Liquid in an Operating EHL Contact

KŘUPKA, I.; HARTL, M.; BAIR, S.; SVOBODA, P. ;KUMAR, P.

Original Title

Mechanical Degradation of the Liquid in an Operating EHL Contact

English Title

Mechanical Degradation of the Liquid in an Operating EHL Contact

Type

Peer-reviewed article not indexed in WoS or Scopus

Original Abstract

Elastohydrodynamic lubrication (EHL) calculations using the real pressure and real shear dependence of viscosity have revealed that the shear and load dependences of film thickness are often greater than the classical prediction. Experimental measurements have confirmed the increased sensitivity to scale and load; however, the sensitivities are even greater than would be expected from shear-thinning. Time-dependent film thickness measurements and stress-history-dependent flow curves are employed to show that molecular degradation may occur at nominal rolling EHL stress levels and that this degradation affects the film thickness.

English abstract

Elastohydrodynamic lubrication (EHL) calculations using the real pressure and real shear dependence of viscosity have revealed that the shear and load dependences of film thickness are often greater than the classical prediction. Experimental measurements have confirmed the increased sensitivity to scale and load; however, the sensitivities are even greater than would be expected from shear-thinning. Time-dependent film thickness measurements and stress-history-dependent flow curves are employed to show that molecular degradation may occur at nominal rolling EHL stress levels and that this degradation affects the film thickness.

Keywords

EHL with non Newtonian lubricants; Rheology; Non Newtonian behavior; Lubricant degradation

Key words in English

EHL with non Newtonian lubricants; Rheology; Non Newtonian behavior; Lubricant degradation

Authors

KŘUPKA, I.; HARTL, M.; BAIR, S.; SVOBODA, P. ;KUMAR, P.

RIV year

2011

Released

05.10.2010

Publisher

Springer

Location

EU

ISBN

1023-8883

Periodical

TRIBOLOGY LETTERS

Volume

40

Number

3

State

United States of America

Pages from

1

Pages to

7

Pages count

7

BibTex

@article{BUT49899,
  author="KŘUPKA, I. and HARTL, M. and BAIR, S. and SVOBODA, P. and KUMAR, P.",
  title="Mechanical Degradation of the Liquid in an Operating EHL Contact",
  journal="TRIBOLOGY LETTERS",
  year="2010",
  volume="40",
  number="3",
  pages="1--7",
  issn="1023-8883"
}