Publication detail
Rapid Prediction of Roughness Effects in Sliding EHL Contacts
ŠPERKA, P. KŘUPKA, I. HARTL, M.
Czech title
Rychlá predikce efektů povrchových nerovností v EHL kontaktech za prokluzu
English title
Rapid Prediction of Roughness Effects in Sliding EHL Contacts
Type
conference paper
Language
en
Original abstract
The surface roughness represents an important issue from many tribological aspects for several decades. Roughness features in elasohydrodynamically lubricated (EHL) contacts substantially affect minimum film thickness, pressure distribution and thus have a great influence on friction, wear and fatigue life. However, surface roughness deforms inside contact and its omission can be oversimplification of the problem. Therefore, it is important to be able predict effects connected with surface roughness to design surface pattern performance. The amplitude attenuation theory provide rapid tool to obtain roughness deformation and associated pressure fluctuations. It is based on the description of essential harmonic surface components with given amplitude and wavelength. This study further extends the model under rolling-sliding conditions with the aim present the complete and simple definition. The possibilities of the model are shown on practical case of surface indentation effects in EHL contacts. The model was compared with experiments on high pressure ball-on-disk optical tribometer.
Czech abstract
Drsnost povrchu představuje významný problém z mnoha tribologických hledisek. Povrchové nerovnosti podstatně ovlivňují funkci elasohydrodynamicky mazaného (EHL) kontaktu. Mají souvislost s minimální tloušťkou mazacího filmu a rozložením tlaku; tím májí velký vliv na tření, opotřebení a únavový život. Tato studie dále rozšiřuje model obecného popisu elastické deformace povrchových nerovností pro podmínky prokluzu s cílem představit kompletní a jednoduchou definici. Možnosti modelu jsou uvedeny na praktickém případu vtisku na kontaktním povrchu. Model byl porovnán s výsledky experimentu na optickém tribometru.
English abstract
The surface roughness represents an important issue from many tribological aspects for several decades. Roughness features in elasohydrodynamically lubricated (EHL) contacts substantially affect minimum film thickness, pressure distribution and thus have a great influence on friction, wear and fatigue life. However, surface roughness deforms inside contact and its omission can be oversimplification of the problem. Therefore, it is important to be able predict effects connected with surface roughness to design surface pattern performance. The amplitude attenuation theory provide rapid tool to obtain roughness deformation and associated pressure fluctuations. It is based on the description of essential harmonic surface components with given amplitude and wavelength. This study further extends the model under rolling-sliding conditions with the aim present the complete and simple definition. The possibilities of the model are shown on practical case of surface indentation effects in EHL contacts. The model was compared with experiments on high pressure ball-on-disk optical tribometer.
Keywords in English
amplitude attenuation theory; elastic deformation
RIV year
2013
Released
09.05.2013
Publisher
Society of Tribologists and Lubrication Engineers
Location
Detroit
ISBN
978-1-62993-289-7
Book
Society of Tribologists & Lubrication Engineers Annual Meeting & Exhibition 2013 / Proceedings of a meeting held 5-9 May 2013, Detroit, Michigan, USA.
Edition number
1
Pages from–to
180–182
Pages count
3
BIBTEX
@inproceedings{BUT106889,
author="Petr {Šperka} and Ivan {Křupka} and Martin {Hartl},
title="Rapid Prediction of Roughness Effects in Sliding EHL Contacts",
booktitle="Society of Tribologists & Lubrication Engineers Annual Meeting & Exhibition 2013 / Proceedings of a meeting held 5-9 May 2013, Detroit, Michigan, USA.",
year="2013",
month="May",
pages="180--182",
publisher="Society of Tribologists and Lubrication Engineers",
address="Detroit",
isbn="978-1-62993-289-7"
}