Publication detail

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

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

English title

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

Type

WoS Article

Language

en

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 in English

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

Released

2016-02-29

Publisher

Elsevier

Location

Anglie

ISSN

0301-679X

Journal

Tribology International

Volume

94

Number

1

Pages from–to

346–351

Pages count

6

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"
}