Detail publikačního výsledku

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

ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Originální název

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

Anglický název

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

Druh

Článek WoS

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

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

Klíčová slova v angličtině

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

Autoři

ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Rok RIV

2017

Vydáno

08.04.2016

Nakladatel

Taylor & Francis Inc

ISSN

1040-2004

Periodikum

TRIBOLOGY TRANSACTIONS

Svazek

59

Číslo

2

Stát

Spojené státy americké

Strany od

277

Strany do

285

Strany počet

8

URL

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

Plný text v Digitální knihovně

http://hdl.handle.net/

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"
}