Detail publikace

Film thickness interrelationship of base oil and grease lubricated compliant and hard non-conformal contacts

FRÝZA, J. ŠPERKA, P. KŘUPKA, I. HARTL, M.

Anglický název

Film thickness interrelationship of base oil and grease lubricated compliant and hard non-conformal contacts

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

The interfaces of plastic components are often operated as self-lubricating or lubricated with greases close to the piezoviscous-elastic lubrication regime. However, current basic tribological knowledge about grease-lubricated compliant contacts is still very limited. This experimental study provides insight into relations between film thicknesses of grease and its base oil in compliant polymethylmethacrylate-steel and stiff glass-steel point contacts at different speeds and loads. The results are compared with predictions. The ratio between grease and its base oil film thickness was found to be significantly influenced by the interplay of load and the non-Newtonian response of grease, especially for the compliant contact, while the effect of speed and the slide-to-roll ratio was considerably lower. The role of viscoelasticity and grease thickener concentration is discussed.

Anglický abstrakt

The interfaces of plastic components are often operated as self-lubricating or lubricated with greases close to the piezoviscous-elastic lubrication regime. However, current basic tribological knowledge about grease-lubricated compliant contacts is still very limited. This experimental study provides insight into relations between film thicknesses of grease and its base oil in compliant polymethylmethacrylate-steel and stiff glass-steel point contacts at different speeds and loads. The results are compared with predictions. The ratio between grease and its base oil film thickness was found to be significantly influenced by the interplay of load and the non-Newtonian response of grease, especially for the compliant contact, while the effect of speed and the slide-to-roll ratio was considerably lower. The role of viscoelasticity and grease thickener concentration is discussed.

Klíčová slova anglicky

Elastohydrodynamic lubrication; rheology; soft elastohydrodynamic lubrication; grease

Vydáno

01.12.2021

Nakladatel

SAGE Publications Ltd

Místo

London

ISSN

1350-6501

Ročník

235

Číslo

12

Strany od–do

2616–2625

Počet stran

10

BIBTEX


@article{BUT174116,
  author="Josef {Frýza} and Petr {Šperka} and Ivan {Křupka} and Martin {Hartl},
  title="Film thickness interrelationship of base oil and grease lubricated compliant and hard non-conformal contacts",
  year="2021",
  volume="235",
  number="12",
  month="December",
  pages="2616--2625",
  publisher="SAGE Publications Ltd",
  address="London",
  issn="1350-6501"
}