Publication detail

The effect of surface grooves on film breakdowns in point contacts

ŠPERKA, P. KŘUPKA, I. HARTL, M.

Original Title

The effect of surface grooves on film breakdowns in point contacts

Type

journal article in Web of Science

Language

English

Original Abstract

Surface roughness plays an important role in transition from full to mixed elastohydrodynamic regime. One kind of features appearing on a real rough surface are grooves longer than contact diameter. It has already been reported that these grooves cause a local film reduction or a complete collapse. In this study, a ball-on-disc optical tribometer was used to quantitatively study the effect of grooves on film thickness in a point contact. It was observed that the main dependence on speed, the so-called lift-off curve, generally follows the logarithm function. The effects of build-up material, load, slide/roll ratio and groove geometry are presented. These results were fitted to the analytical description, which enables the estimation of groove effects on point contact lubrication.

Keywords

Elastohydrodynamic lubrication; Film thickness; Surface roughness; Surface texture

Authors

ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Released

1. 10. 2016

Publisher

Elsevier

Location

England

ISBN

0301-679X

Periodical

Tribology International

Year of study

102

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

249

Pages to

256

Pages count

8

URL

http://www.sciencedirect.com/science/article/pii/S0301679X16301220

Full text in the Digital Library

http://hdl.handle.net/11012/180516

BibTex

@article{BUT114922,
  author="Petr {Šperka} and Ivan {Křupka} and Martin {Hartl}",
  title="The effect of surface grooves on film breakdowns in point contacts",
  journal="Tribology International",
  year="2016",
  volume="102",
  number="1",
  pages="249--256",
  doi="10.1016/j.triboint.2016.05.031",
  issn="0301-679X",
  url="http://www.sciencedirect.com/science/article/pii/S0301679X16301220"
}