Publication detail
Pressure increase in elliptical impact ehl contacts with surface asperities
KŘUPKA, I. HARTL, M. KANETA, M.
Czech title
Nárůst tlaku v eliptických kontaktech s povrchovými nerovnostmi při náhlém zatížení
English title
Pressure increase in elliptical impact ehl contacts with surface asperities
Type
conference paper
Language
en
Original abstract
The phenomena which occur when a spherical steel body impacts a stationary steel plate with surface asperities are discussed through isothermal Newtonian numerical analysis using sinusoidal roughness. The ridges of the sinusoidal roughness produce large local pressures, particularly in elliptical contacts, when constant loads are imposed on the contact by impact. The pressure level is usually larger when the ridges are located along the major contact direction than along the minor contact direction, and increases as the loading speed increases. The high pressure induces a micro-groove in the ridge and the horse-shoe shaped constriction is formed at the ridges locating around the contact edge.
Czech abstract
Cílem studia je popsat vliv náhlého zatížení třecích těles na nárůst tlaku v eliptických kontaktech s povrchovými nerovnostmi. Povrchové nerovnosti významným způsobem ovlivňují rozložení tlaku a utváření mazacího filmu. Při náhlých změnách zatížení tento vliv může způsobit podstatné sníéžení životnosti třecích povrchů.
English abstract
The phenomena which occur when a spherical steel body impacts a stationary steel plate with surface asperities are discussed through isothermal Newtonian numerical analysis using sinusoidal roughness. The ridges of the sinusoidal roughness produce large local pressures, particularly in elliptical contacts, when constant loads are imposed on the contact by impact. The pressure level is usually larger when the ridges are located along the major contact direction than along the minor contact direction, and increases as the loading speed increases. The high pressure induces a micro-groove in the ridge and the horse-shoe shaped constriction is formed at the ridges locating around the contact edge.
Keywords in Czech
EHL, Zatížení, Kuličkové ložiska
Keywords in English
Impact, Rolling Bearings, Ball Bearings
RIV year
2012
Released
08.10.2012
Publisher
American Society of Mechanical Engineers, Tribology Division, TRIB
Location
Denver, CO; United States
ISBN
9780791845080
Book
Proceedings of the ASME/STLE 2012 International Joint Tribology Conference
Pages from–to
101–102
Pages count
2
BIBTEX
@inproceedings{BUT123923,
author="Ivan {Křupka} and Martin {Hartl} and Motohiro {Kaneta},
title="Pressure increase in elliptical impact ehl contacts with surface asperities",
booktitle="Proceedings of the ASME/STLE 2012 International Joint Tribology Conference",
year="2012",
month="October",
pages="101--102",
publisher="American Society of Mechanical Engineers, Tribology Division, TRIB",
address="Denver, CO; United States",
isbn="9780791845080"
}