Publication detail

Abnormal lubricant aggregation on roughness features in a rolling–sliding elastohydrodynamic contact

ŠPERKA, P. OMASTA, M. KŘUPKA, I. HARTL, M.

Original Title

Abnormal lubricant aggregation on roughness features in a rolling–sliding elastohydrodynamic contact

Type

journal article in Web of Science

Language

English

Original Abstract

Any practical surface has some roughness which tends to decrease film thickness in concentrated contacts and increase the risk of surface failures. Surface roughness is deformed but roughness also influences the lubrication process. Therefore, it is important to understand these constrains, to predict a real performance of rough surfaces. It was already reported that roughness tends to flatten inside the contact under rolling–sliding conditions. However, this paper presents experiments showing an abnormal effect inside point contact when the additional lubricant is aggregated on the roughness feature (ridge). Enhanced roughness deformation has a protecting function against direct asperities contacts. The relationship to lubricant speed changes inside the contact, a role of thermal effect and possibility of phase transitions are discussed.

Keywords

Elastohydrodynamic lubrication, surface roughness, roughness effects, amplitude attenuation theory, film thickness, pressure variations, lubricant rheology, in-contact conditions

Authors

ŠPERKA, P.; OMASTA, M.; KŘUPKA, I.; HARTL, M.

Released

29. 2. 2016

Publisher

Elsevier

Location

Anglie

ISBN

0301-679X

Periodical

Tribology International

Year of study

94

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

346

Pages to

351

Pages count

6

URL

http://www.sciencedirect.com/science/article/pii/S0301679X15004430

BibTex

@article{BUT134834,
  author="Petr {Šperka} and Milan {Omasta} and Ivan {Křupka} and Martin {Hartl}",
  title="Abnormal lubricant aggregation on roughness features in a rolling–sliding elastohydrodynamic contact",
  journal="Tribology International",
  year="2016",
  volume="94",
  number="1",
  pages="346--351",
  doi="10.1016/j.triboint.2015.09.041",
  issn="0301-679X",
  url="http://www.sciencedirect.com/science/article/pii/S0301679X15004430"
}