Publication result detail

Fundamentals of thermal elastohydrodynamic lubrication in Si3N4 and steel circular contacts

KANETA, M.; YANG, P.; KŘUPKA, I.; HARTL, M.

Original Title

Fundamentals of thermal elastohydrodynamic lubrication in Si3N4 and steel circular contacts

English Title

Fundamentals of thermal elastohydrodynamic lubrication in Si3N4 and steel circular contacts

Type

WoS Article

Original Abstract

The Si3N4 and steel are one of representative material combinations used in actual machine elements. The fundamental tribo-characteristics in Si3N4 and steel circular contacts are described through non-Newtonian thermal elastohydrodynamic lubrication analysis. The central film thickness and pressure spike are markedly influenced by the sign of the slideroll ratio, i.e. by the positive and negative thermal viscosity wedge actions, while the minimum film thickness is very little affected by them. The thermal expansion of the fluid is also an important factor controlling the film thickness. Even if dimensionless parameters U, G, and W are fixed, the coefficient of traction and the film thickness are very much influenced by the equivalent radius of contact bodies.

English abstract

The Si3N4 and steel are one of representative material combinations used in actual machine elements. The fundamental tribo-characteristics in Si3N4 and steel circular contacts are described through non-Newtonian thermal elastohydrodynamic lubrication analysis. The central film thickness and pressure spike are markedly influenced by the sign of the slideroll ratio, i.e. by the positive and negative thermal viscosity wedge actions, while the minimum film thickness is very little affected by them. The thermal expansion of the fluid is also an important factor controlling the film thickness. Even if dimensionless parameters U, G, and W are fixed, the coefficient of traction and the film thickness are very much influenced by the equivalent radius of contact bodies.

Keywords

Thermal elastohydrodynamic lubrication; thermal viscosity wedge action; thermal conductivity; thermal expansion; slide-roll ratio; Si3N4–steel contact; equivalent radius

Key words in English

Thermal elastohydrodynamic lubrication; thermal viscosity wedge action; thermal conductivity; thermal expansion; slide-roll ratio; Si3N4–steel contact; equivalent radius

Authors

KANETA, M.; YANG, P.; KŘUPKA, I.; HARTL, M.

RIV year

2016

Released

17.08.2015

Publisher

Sage

Location

UK

ISBN

1350-6501

Periodical

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

Volume

229

Number

8

State

United Kingdom of Great Britain and Northern Ireland

Pages from

929

Pages to

939

Pages count

11

BibTex

@article{BUT112543,
  author="KANETA, M. and YANG, P. and KŘUPKA, I. and HARTL, M.",
  title="Fundamentals of thermal elastohydrodynamic lubrication in Si3N4 and steel circular contacts",
  journal="PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY",
  year="2015",
  volume="229",
  number="8",
  pages="929--939",
  issn="1350-6501"
}