Publication detail

Ehl traction analysis of perfluoropolyether fluids based on bulk modulus

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

English title

Ehl traction analysis of perfluoropolyether fluids based on bulk modulus

Type

Peer-reviewed article not indexed in WoS or Scopus

Language

en

Original abstract

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.

Keywords in English

point contact numerical solution, phase diagram

Released

2014-05-09

Publisher

Helsinky University of Technology

Location

Helsinky

ISSN

0780-2285

Journal

Tribologia: Finnish Journal of Tribology

Volume

32

Number

2

Pages from–to

29–37

Pages count

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"
}