Publication detail
Experimental Study of Roughness Effect in a Rolling–Sliding EHL Contact. Part I: Roughness Deformation
ŠPERKA, P. KŘUPKA, I. HARTL, M.
Czech title
Experimentální studium vlivu povrchových nerovností na mazání EHL kontaktu za prokluzu. Část I: deformace nerovností
English title
Experimental Study of Roughness Effect in a Rolling–Sliding EHL Contact. Part I: Roughness Deformation
Type
journal article in Web of Science
Language
en
Original abstract
This article presents experimental results of artificial roughness behavior inside elastohydrodynamic contacts. An optical tribometer with a high-speed camera was used to measure the film thickness distribution inside the contact. The results are compared to the amplitude attenuation theory including a description of harmonic components modification. Part I of the article deals with roughness deformation. The effects of central film thickness and slide-to-roll ratio on the roughness feature deformation were investigated for two lubricants. It was found that roughness is independent of sliding magnitude and position inside a highly loaded zone. The results showed a good correlation with Hooke's approximate amplitude attenuation model. However, it reaches a limiting deformation under thin film conditions. Part II of the article deals with complementary effect connected with surface roughness under rolling–sliding conditions.
Czech abstract
Článek prezentuje experimentální výsledky chování umělé nerovnosti uvnitř elastohydrodynamického kontaktu. Optický tribometr s vysokorychlostní kamerou byly využity pro měření rozložení tloušťky mazacího filmu uvnitř kontaktu. Výsledky jsou porovnávány s teorií amplitudového útlumu popisující změny nerovností na základě popisu modifikace harmonických složek povrchu. Byl zkoumán účinek centrální tloušťky a poměrného prokluzu na deformaci nerovnosti pro dvě maziva. Bylo zjištěno, že deformace drsnosti je nezávislá na velikosti poměrného prokluzu a pozici uvnitř kontaktu. Výsledky jsou ve shodě s modelem publikovaným Hookem. Ovšem bylo pozorováno zastavení deformace u tenkých filmů, které doposud nebylo publikováno. Druhá část článku se zabývá komplementárními jevy spojenými s průchodem nerovnosti kontaktem za prokluzu.
English abstract
This article presents experimental results of artificial roughness behavior inside elastohydrodynamic contacts. An optical tribometer with a high-speed camera was used to measure the film thickness distribution inside the contact. The results are compared to the amplitude attenuation theory including a description of harmonic components modification. Part I of the article deals with roughness deformation. The effects of central film thickness and slide-to-roll ratio on the roughness feature deformation were investigated for two lubricants. It was found that roughness is independent of sliding magnitude and position inside a highly loaded zone. The results showed a good correlation with Hooke's approximate amplitude attenuation model. However, it reaches a limiting deformation under thin film conditions. Part II of the article deals with complementary effect connected with surface roughness under rolling–sliding conditions.
Keywords in Czech
elastohydrodynamické mazání, drsnost povrchu, efekty povrchvových nerovností, teorie amplitudového útlumu, tloušťka mazacího filmu, kolísání tlaku, reologie maziva, podmínky v kontaktu
Keywords in English
elastohydrodynamic lubrication, surface roughness, roughness effects, amplitude attenuation theory, film thickness, pressure variations, lubricant rheology, in-contact conditions
Released
03.03.2016
Publisher
Taylor & Francis Inc
ISSN
1040-2004
Volume
59
Number
2
Pages from–to
267–276
Pages count
10
BIBTEX
@article{BUT134836,
author="Petr {Šperka} and Ivan {Křupka} and Martin {Hartl},
title="Experimental Study of Roughness Effect in a Rolling–Sliding EHL Contact. Part I: Roughness Deformation",
year="2016",
volume="59",
number="2",
month="March",
pages="267--276",
publisher="Taylor & Francis Inc",
issn="1040-2004"
}