Publication result detail

Effects of lubricant rheology and impact speed on EHL film thickness at pure squeeze action

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

Original Title

Effects of lubricant rheology and impact speed on EHL film thickness at pure squeeze action

English Title

Effects of lubricant rheology and impact speed on EHL film thickness at pure squeeze action

Type

WoS Article

Original Abstract

A squeeze film action is an essential phenomenon in elastohydrodynamically lubricated conjunctions subjected to impact loading or sudden halting of motion and affects both film thickness and friction. This study presents experimental results of film thickness behaviour of lubricant entrapment under diverse conditions including initial impact gaps, initial approaching speeds, loading speeds and variety of lubricants during introductory part of impact loading. The results are compared with recent theoretical solution. It is shown that the entrapped film shape directly depends on loading speed and the central film thickness is mainly determined by the approaching speed and lubricant viscosity and can be approximated by power law where the influence of impact times/speeds can be estimated from basic rheological properties of lubricants.

English abstract

A squeeze film action is an essential phenomenon in elastohydrodynamically lubricated conjunctions subjected to impact loading or sudden halting of motion and affects both film thickness and friction. This study presents experimental results of film thickness behaviour of lubricant entrapment under diverse conditions including initial impact gaps, initial approaching speeds, loading speeds and variety of lubricants during introductory part of impact loading. The results are compared with recent theoretical solution. It is shown that the entrapped film shape directly depends on loading speed and the central film thickness is mainly determined by the approaching speed and lubricant viscosity and can be approximated by power law where the influence of impact times/speeds can be estimated from basic rheological properties of lubricants.

Keywords

Elastohydrodynamic lubrication; Non-steady state film thickness; Squeeze action; Lubricants

Key words in English

Elastohydrodynamic lubrication; Non-steady state film thickness; Squeeze action; Lubricants

Authors

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

RIV year

2017

Released

15.10.2016

Publisher

Elsevier

ISBN

0301-679X

Periodical

Tribology International

Volume

106

Number

2

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

9

Pages count

9

URL

http://www.sciencedirect.com/science/article/pii/S0301679X16303851

BibTex

@article{BUT129364,
  author="Josef {Frýza} and Petr {Šperka} and Motohiro {Kaneta} and Ivan {Křupka} and Martin {Hartl}",
  title="Effects of lubricant rheology and impact speed on EHL film thickness at pure squeeze action",
  journal="Tribology International",
  year="2016",
  volume="106",
  number="2",
  pages="1--9",
  doi="10.1016/j.triboint.2016.10.023",
  issn="0301-679X",
  url="http://www.sciencedirect.com/science/article/pii/S0301679X16303851"
}