Publication detail

Effects of Loading Process and Contact Shape on Point Impact Elastohydrodynamics

KANETA, M. KŘUPKA, I. HARTL, M.

Czech title

Vliv procesu zatěžování a tvaru kontaktu na elastohydrodynamický kontakt

English title

Effects of Loading Process and Contact Shape on Point Impact Elastohydrodynamics

Type

journal article - other

Language

en

Original abstract

The squeeze effect is an important subject in studies of elastohydrodynamic lubrication (EHL). By impact loading, the oil between point contact surfaces is entrapped at the central region or the peripheral region depending on the initial conditions. The effects of the loading process, surface roughness, and ellipticity ratio of contacts on the film thickness and pressure distributions are not fully understood yet. In the current study, those effects are elucidated through numerical analyses by specified initial impact gaps, which produce the central or the peripheral oil entrapments. The loading process, which can produce rather low pressure, has been proposed. Moreover, conditions, under which a microdimple is produced in the central circular bump are clarified.

Czech abstract

Článek shrnuje výsledky numerického studia vlivu povrchových nerovností na utváření mazacího filmu při normálovém přiblížení třecích těles. Je ukázán vliv procesu zatěžování a tvaru kontaktu na rozložení tlaku v mazacím filmu a průběh jeho utváření v závislosti na počátečním přiblížení těles.

English abstract

The squeeze effect is an important subject in studies of elastohydrodynamic lubrication (EHL). By impact loading, the oil between point contact surfaces is entrapped at the central region or the peripheral region depending on the initial conditions. The effects of the loading process, surface roughness, and ellipticity ratio of contacts on the film thickness and pressure distributions are not fully understood yet. In the current study, those effects are elucidated through numerical analyses by specified initial impact gaps, which produce the central or the peripheral oil entrapments. The loading process, which can produce rather low pressure, has been proposed. Moreover, conditions, under which a microdimple is produced in the central circular bump are clarified.

Keywords in Czech

elastohydrodynamický film; rázové zatížení; mikrovýstupek; povrchové nerovnosti

Keywords in English

elastohydrodynamics; impact load; microdimple; surface asperity

RIV year

2012

Released

16.11.2012

Publisher

Taylor & Francis

Location

USA

ISSN

1040-2004

Volume

55

Number

6

Pages from–to

772–781

Pages count

10

BIBTEX


@article{BUT96706,
  author="Motohiro {Kaneta} and Ivan {Křupka} and Martin {Hartl},
  title="Effects of Loading Process and Contact Shape on Point Impact Elastohydrodynamics",
  year="2012",
  volume="55",
  number="6",
  month="November",
  pages="772--781",
  publisher="Taylor & Francis",
  address="USA",
  issn="1040-2004"
}