Publication detail
Numerical solution of contact pressure in lubricated non-smooth point contact using convolution algorithms
FICZA, I. VAVERKA, M. HARTL, M.
Czech title
Numerické řešení kontaktního tlaku elastohydrodynamicky mazaného bodového kontaktu pomocí konvoluce
English title
Numerical solution of contact pressure in lubricated non-smooth point contact using convolution algorithms
Type
journal article in Scopus
Language
en
Original abstract
Machine parts with non-conformal contact surfaces can operate with thin lubrication film. In the vicinity of asperities or micro-dents, significant fluctuations in lubricant film thickness and in contact pressure occur, which can have positive or negative effects on lubrication efficiency and contact fatigue life. The knowledge of mentioned quantities is necessary for assessment of these effects. Presented work is concerned with improved technique for numerical determination of pressure from measured film thickness using the inverse elasticity theory whereas the time consuming calculation is enhanced by rapid convolution. The solution of other partial calculation difficulties is discussed, too.
Czech abstract
Nekonformní strojní součásti mohou pracovat v režimu mazání s tenkými mazacími filmy. V blízkosti povrchových nerovností, jako jsou např. denty, se mohou objevit výrazné fluktuace tloušťky mazacího filmu a kontatkního tlaku, které mají vliv (negativní, i pozitivní) na mazání i únavu kontaktních těles. Pro posouzení těchto vlivů je nutná znalost zmíněných parametrů. Současná práce představuje metodu zabývající se výpočtem kontaktního tlaku z experimentálně stanovených hodnot tloušťky filmu pomocí inverzní teorie pružnosti. Časově náročný výpočet je zrychlen pomocí konvoluce.
English abstract
Machine parts with non-conformal contact surfaces can operate with thin lubrication film. In the vicinity of asperities or micro-dents, significant fluctuations in lubricant film thickness and in contact pressure occur, which can have positive or negative effects on lubrication efficiency and contact fatigue life. The knowledge of mentioned quantities is necessary for assessment of these effects. Presented work is concerned with improved technique for numerical determination of pressure from measured film thickness using the inverse elasticity theory whereas the time consuming calculation is enhanced by rapid convolution. The solution of other partial calculation difficulties is discussed, too.
Keywords in Czech
konvoluce; elastohydrodynamické mazání; EHD; smíšené mazání; tlak; dent; tribologie
Keywords in English
convolution algorithm; elastohydrodynamic; EHD; mixed lubrication; contact pressure; dent; tribology
RIV year
2014
Released
01.09.2014
Publisher
Inderscience Publishers
Location
UK
ISSN
1742-7193
Volume
9
Number
5/6
Pages from–to
457–464
Pages count
8
BIBTEX
@article{BUT109291,
author="Ildikó {Ficza} and Michal {Vaverka} and Martin {Hartl},
title="Numerical solution of contact pressure in lubricated non-smooth point contact using convolution algorithms",
year="2014",
volume="9",
number="5/6",
month="September",
pages="457--464",
publisher="Inderscience Publishers",
address="UK",
issn="1742-7193"
}