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ŠPERKA, P. KŘUPKA, I. HARTL, M.
Original Title
Experimental Study of Roughness Effect in a Rolling-Sliding EHL Contact. Part II: Complementary Effects
Type
journal article in Web of Science
Language
English
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.
Keywords
Elastohydrodynamic lubrication, surface roughness, amplitude attenuation theory, film thickness, contact inlet
Authors
ŠPERKA, P.; KŘUPKA, I.; HARTL, M.
Released
8. 4. 2016
Publisher
Taylor & Francis Inc
ISBN
1040-2004
Periodical
TRIBOLOGY TRANSACTIONS
Year of study
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" }