Publication detail

Fundamentals of thermal elastohydrodynamic lubrication in Si3N4 and steel circular contacts

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

Czech title

Elastohydrodynamické mazání kruhových kontaktů Si3N4 a ocel se zahrnutím tepelných jevů

English title

Fundamentals of thermal elastohydrodynamic lubrication in Si3N4 and steel circular contacts

Type

journal article in Web of Science

Language

en

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.

Czech abstract

Si3N4 a oceli jsou jedním z reprezentativních kombinací materiálů použitých u skutečných strojních součástí. Základní tribologické charakteristiky u Si3N4 a ocelových kruhových kontaktů jsou popsány prostřednictvím non-newtonovské termální elastohydrodynamického analýzy mazání. Centrální tloušťka filmu a tlakové maximum jsou výrazně ovlivněny poměrem kluz-valení.

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 in Czech

Elastohydrodynamické mazání se zahrnutím tepelných jevů; tepelná vodivost; tepelná roztažnost; poměr kluz-valení; kontakt Si3N4-ocel; ekvivalentní poloměr

Keywords in English

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

RIV year

2015

Released

17.08.2015

Publisher

Sage

Location

UK

ISSN

1350-6501

Volume

229

Number

8

Pages from–to

929–939

Pages count

11

BIBTEX


@article{BUT112543,
  author="Ivan {Křupka} and Motohiro {Kaneta} and Martin {Hartl},
  title="Fundamentals of thermal elastohydrodynamic lubrication in Si3N4 and steel circular contacts",
  year="2015",
  volume="229",
  number="8",
  month="August",
  pages="929--939",
  publisher="Sage",
  address="UK",
  issn="1350-6501"
}