Detail publikace
Ehl traction analysis of perfluoropolyether fluids based on bulk modulus
KANETA, M. ŠPERKA, P. KŘUPKA, I. HARTL, M.
Anglický název
Ehl traction analysis of perfluoropolyether fluids based on bulk modulus
Typ
Článek recenzovaný mimo WoS a Scopus
Jazyk
en
Originální abstrakt
Using three kinds of commercial perfluoropolyether (PFPE) fluids, the authors carried out high pressure density test at the pressure up to 1.2 GPa. Tangent bulk modulus and secant bulk modulus of the PFPE fluids were calculated by using the test results. Relationships of these moduli with pressure and temperature were examined. High pressure viscosity of each PFPE fluid was measured and the pressure viscosity coefficients of the PFPE fluids were obtained. In addition, the maximum traction coefficient and the limiting shear stress of each fluid were evaluated from the traction test employing a ball-on-disk testing machine. As a result, it was found that the maximum traction coefficient and the limiting shear stress are closely related to the tangent bulk modulus and the secant bulk modulus, respectively. The significant relationship of the maximum traction coefficient with the molecular packing parameter represented by the product of the pressure viscosity coefficient and the mean Hertzian pressure was also confirmed.
Klíčová slova anglicky
point contact numerical solution, phase diagram
Vydáno
2014-05-09
Nakladatel
Helsinky University of Technology
Místo
Helsinky
ISSN
0780-2285
Časopis
Tribologia: Finnish Journal of Tribology
Ročník
32
Číslo
2
Strany od–do
29–37
Počet stran
9
BIBTEX
@article{BUT123924,
author="Motohiro {Kaneta} and Petr {Šperka} and Ivan {Křupka} and Martin {Hartl}",
title="Ehl traction analysis of perfluoropolyether fluids based on bulk modulus",
journal="Tribologia: Finnish Journal of Tribology",
year="2014",
volume="32",
number="2",
pages="29--37",
issn="0780-2285"
}