Publication result detail

The role of the glass transition for EHL minimum film thickness

HABCHI, W.; ŠPERKA, P.; BAIR, S.

Original Title

The role of the glass transition for EHL minimum film thickness

English Title

The role of the glass transition for EHL minimum film thickness

Type

WoS Article

Original Abstract

When the glass transition is considered in an EHL traction analysis, shear-thinning is not sufficient to explain experiments because there is no liquid behavior to shear-thin and a limiting stress is required. The usual approach of ignoring the glass transition and the associated previtreous pressure dependence has concealed the role of vitrification in establishing the minimum film thickness in real contacts. For the first time, the glass transition is considered in an elastohydrodynamic lubrication simulation along with the glass compressibility. Vitrification and the previtreous pressure response are necessary to predict the minimum film thickness in a point contact. Future numerical simulations should include the glass transition, both for the film thickness and, of course, friction.

English abstract

When the glass transition is considered in an EHL traction analysis, shear-thinning is not sufficient to explain experiments because there is no liquid behavior to shear-thin and a limiting stress is required. The usual approach of ignoring the glass transition and the associated previtreous pressure dependence has concealed the role of vitrification in establishing the minimum film thickness in real contacts. For the first time, the glass transition is considered in an elastohydrodynamic lubrication simulation along with the glass compressibility. Vitrification and the previtreous pressure response are necessary to predict the minimum film thickness in a point contact. Future numerical simulations should include the glass transition, both for the film thickness and, of course, friction.

Keywords

EHL;Film thickness;Glass transition;Pressure-viscosity

Key words in English

EHL;Film thickness;Glass transition;Pressure-viscosity

Authors

HABCHI, W.; ŠPERKA, P.; BAIR, S.

RIV year

2024

Released

01.12.2023

Publisher

Elsevier

Location

OXFORD, ENGLAND

ISBN

0301-679X

Periodical

Tribology International

Volume

190

Number

12

State

United Kingdom of Great Britain and Northern Ireland

Pages count

8

URL

https://www.sciencedirect.com/science/article/pii/S0301679X23008496

BibTex

@article{BUT187578,
  author="Wassim {Habchi} and Petr {Šperka} and Scott {Bair}",
  title="The role of the glass transition for EHL minimum film thickness",
  journal="Tribology International",
  year="2023",
  volume="190",
  number="12",
  pages="8",
  doi="10.1016/j.triboint.2023.109061",
  issn="0301-679X",
  url="https://www.sciencedirect.com/science/article/pii/S0301679X23008496"
}