Detail publikace

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

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

Anglický název

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

Typ

Článek WoS

Jazyk

en

Originální abstrakt

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.

Klíčová slova anglicky

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

Vydáno

2016-02-29

Nakladatel

Elsevier

Místo

Anglie

ISSN

0301-679X

Časopis

Tribology International

Ročník

94

Číslo

1

Strany od–do

346–351

Počet stran

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"
}