Publication detail
Formation of micro-grooves under impact loading in elliptical contacts with surface ridges
KANETA, M. KŘUPKA, I. HARTL, M. GUO, F. WANG, J.
Czech title
Utváření mikrovtisků při rázovém zatížení v eliptických kontaktech s povrchovými nerovnostmi
English title
Formation of micro-grooves under impact loading in elliptical contacts with surface ridges
Type
journal article - other
Language
en
Original abstract
This paper is focused on the effect of impact loading on micro-deformation of asperities in elliptical elastohydrodynamic contacts. Based upon isothermal Newtonian numerical analyses, it is elucidated that a micro-groove, which appears in the ridge under impact loading in elliptical contacts, is brought about by two different mechanisms. One is the smooth surface local pressure difference across the virtual ridge and the other is the macroscopic pressure difference along the ridge. The formation of the micro-groove due to the former mechanism is influenced by the shape, size and orientation of the ridge, and the smooth surface pressure distribution depending on the initial impact gap and loading speed, and that due to the latter is markedly influenced by the loading speed.
Czech abstract
Článek shrnuje výsledky numerického studia vlivu povrchových nerovností na utváření mazacího filmu při náhlém normálovém přiblížení třecích těles. V článku jsou diskutovány příčiny vzniku mikrodeformací mazacího filmu a lokální zvýšení tlaku v eliptickém kontaktu.
English abstract
This paper is focused on the effect of impact loading on micro-deformation of asperities in elliptical elastohydrodynamic contacts. Based upon isothermal Newtonian numerical analyses, it is elucidated that a micro-groove, which appears in the ridge under impact loading in elliptical contacts, is brought about by two different mechanisms. One is the smooth surface local pressure difference across the virtual ridge and the other is the macroscopic pressure difference along the ridge. The formation of the micro-groove due to the former mechanism is influenced by the shape, size and orientation of the ridge, and the smooth surface pressure distribution depending on the initial impact gap and loading speed, and that due to the latter is markedly influenced by the loading speed.
Keywords in Czech
elastohydrodynamický film; rázové zatížení; eliptický kontakt; nerovnost
Keywords in English
elastohydrodynamic lubrication; impact; elliptical contact; roughness
RIV year
2013
Released
19.02.2013
Publisher
Elsevier
Location
EU
ISSN
0301-679X
Volume
65
Number
9
Pages from–to
336–345
Pages count
10
BIBTEX
@article{BUT103165,
author="Motohiro {Kaneta} and Ivan {Křupka} and Martin {Hartl},
title="Formation of micro-grooves under impact loading in elliptical contacts with surface ridges",
year="2013",
volume="65",
number="9",
month="February",
pages="336--345",
publisher="Elsevier",
address="EU",
issn="0301-679X"
}