Publication result detail

Experimental Study of Roughness Effect in a Rolling-Sliding EHL Contact. Part II: Complementary Effects

ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Original Title

Experimental Study of Roughness Effect in a Rolling-Sliding EHL Contact. Part II: Complementary Effects

English Title

Experimental Study of Roughness Effect in a Rolling-Sliding EHL Contact. Part II: Complementary Effects

Type

WoS Article

Original Abstract

Part I of the article deals with roughness deformation. Part II presents experimental results of complementary effects under rolling–sliding. An optical tribometer with a high-speed camera was employed to measure roughness passage through the contact. The entire film profile of complementary effects was evaluated by combining several interferograms. The film profiles were analyzed by means of Fourier transform and related to the initial roughness profile. Achieved amplitude ratios of various harmonic components were compared with existing theoretical data from amplitude attenuation theory. This approach allows a general description of roughness effects in elastohydrodynamic contacts. It was found that it is not necessary to consider the amplitude decay rate and in-contact wavelength modification of the complementary effect for the studied case. Part of the measured amplitude ratios showed an agreement with theory; however, the other part showed a significant discrepancy. An explanation based on different wavelength scaling at the contact inlet and short wavelength limitation was suggested. A relation to lubricant flow and necessary future developments are discussed.

English abstract

Part I of the article deals with roughness deformation. Part II presents experimental results of complementary effects under rolling–sliding. An optical tribometer with a high-speed camera was employed to measure roughness passage through the contact. The entire film profile of complementary effects was evaluated by combining several interferograms. The film profiles were analyzed by means of Fourier transform and related to the initial roughness profile. Achieved amplitude ratios of various harmonic components were compared with existing theoretical data from amplitude attenuation theory. This approach allows a general description of roughness effects in elastohydrodynamic contacts. It was found that it is not necessary to consider the amplitude decay rate and in-contact wavelength modification of the complementary effect for the studied case. Part of the measured amplitude ratios showed an agreement with theory; however, the other part showed a significant discrepancy. An explanation based on different wavelength scaling at the contact inlet and short wavelength limitation was suggested. A relation to lubricant flow and necessary future developments are discussed.

Keywords

Elastohydrodynamic lubrication, surface roughness, amplitude attenuation theory, film thickness, contact inlet

Key words in English

Elastohydrodynamic lubrication, surface roughness, amplitude attenuation theory, film thickness, contact inlet

Authors

ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

RIV year

2017

Released

08.04.2016

Publisher

Taylor & Francis Inc

ISBN

1040-2004

Periodical

TRIBOLOGY TRANSACTIONS

Volume

59

Number

2

State

United States of America

Pages from

277

Pages to

285

Pages count

8

URL

http://www.tandfonline.com/doi/full/10.1080/10402004.2015.1070941

BibTex

@article{BUT134835,
  author="Petr {Šperka} and Ivan {Křupka} and Martin {Hartl}",
  title="Experimental Study of Roughness Effect in a Rolling-Sliding EHL Contact. Part II: Complementary Effects",
  journal="TRIBOLOGY TRANSACTIONS",
  year="2016",
  volume="59",
  number="2",
  pages="277--285",
  doi="10.1080/10402004.2015.1070941",
  issn="1040-2004",
  url="http://www.tandfonline.com/doi/full/10.1080/10402004.2015.1070941"
}