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"
}