Publication detail
Influence of Surface Dents on Elastohydrodynamic and Mixed Lubrication
VAVERKA, M. ZAPLETAL, L. ŠAMÁNEK, O. VRBKA, M.
Czech title
Vliv povrchových nerovností na elastohydrodynamické a smíšené mazání
English title
Influence of Surface Dents on Elastohydrodynamic and Mixed Lubrication
Type
conference paper
Language
en
Original abstract
Machine parts with non-conformal contact surfaces frequently operate in elastohydrodynamic or mixed regime of lubrication. In surroundings of asperities significant changes in lubricant film thickness and also contact pressure occur, which can lead to failure. The article deals with the influence of surface dents on film thickness, contact pressure and rolling contact fatigue. These quantities are important for machine design in terms of failure (pitting and scuffing). Lubricant film thickness is measured by thin film colorimetric interferometry (TCFI) and contact pressure is calculated using inverse elasticity theory enhanced by convolution algorithms. Rolling contact fatigue tests show that it is possible to design surface textures of suitable layout of microdents which can have positive effect on lubrication and rolling contact fatigue life.
Czech abstract
Článek se zabývá vlivem mikrovtisků a jejich textur, lae také mikronerovností na tloušťku mazacího filmu, kontaktní tlak, kontaktní únavu.
English abstract
Machine parts with non-conformal contact surfaces frequently operate in elastohydrodynamic or mixed regime of lubrication. In surroundings of asperities significant changes in lubricant film thickness and also contact pressure occur, which can lead to failure. The article deals with the influence of surface dents on film thickness, contact pressure and rolling contact fatigue. These quantities are important for machine design in terms of failure (pitting and scuffing). Lubricant film thickness is measured by thin film colorimetric interferometry (TCFI) and contact pressure is calculated using inverse elasticity theory enhanced by convolution algorithms. Rolling contact fatigue tests show that it is possible to design surface textures of suitable layout of microdents which can have positive effect on lubrication and rolling contact fatigue life.
Keywords in Czech
EHD, elastohydrodynamické mazání, smíšené mazání
Keywords in English
Elastohydrodynamic lubrication, EHL, surfaces, roughness, contact pressure, asperities, dents, contact fatigue
RIV year
2011
Released
09.05.2011
Publisher
IT ASCR
Location
Brno
ISBN
978-80-87012-33-8
Book
Engineering Mechanics 2011
Edition number
1
Pages from–to
643–646
Pages count
4
BIBTEX
@inproceedings{BUT36667,
author="Michal {Vaverka} and Lukáš {Zapletal} and Otakar {Šamánek} and Martin {Vrbka},
title="Influence of Surface Dents on Elastohydrodynamic and Mixed Lubrication",
booktitle="Engineering Mechanics 2011",
year="2011",
month="May",
pages="643--646",
publisher="IT ASCR",
address="Brno",
isbn="978-80-87012-33-8"
}