Publication result detail

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

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

Original Title

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

English Title

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

Type

WoS Article

Original Abstract

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.

English abstract

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.

Keywords

Elastohydrodynamic lubrication; rheology; soft elastohydrodynamic lubrication; grease

Key words in English

Elastohydrodynamic lubrication; rheology; soft elastohydrodynamic lubrication; grease

Authors

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

RIV year

2022

Released

01.12.2021

Publisher

SAGE Publications Ltd

Location

London

ISBN

1350-6501

Periodical

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY

Volume

235

Number

12

State

United Kingdom of Great Britain and Northern Ireland

Pages from

2616

Pages to

2625

Pages count

10

URL

https://journals.sagepub.com/doi/10.1177/13506501211053542

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",
  journal="PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY",
  year="2021",
  volume="235",
  number="12",
  pages="2616--2625",
  doi="10.1177/13506501211053542",
  issn="1350-6501",
  url="https://journals.sagepub.com/doi/10.1177/13506501211053542"
}