Publication detail

Pressure Increase in Elliptical Impact Elastohydrodynamic Lubrication Contacts With Longitudinal Asperities

KANETA, M. KŘUPKA, I. HARTL, M.

Czech title

Nárůst tlaku v eliptickém elastohydrodynamickém kontaktu s podélnými povrchovými nerovnostmi

English title

Pressure Increase in Elliptical Impact Elastohydrodynamic Lubrication Contacts With Longitudinal Asperities

Type

journal article - other

Language

en

Original abstract

The phenomena that occur when an elliptical steel body impacts a stationary steel plate with surface asperities are discussed through isothermal Newtonian numerical analysis using sinusoidal roughness. The ridges of the surface asperities produce large local pressures, especially at a large ellipticity ratio, when the surfaces are approaching each other under the applied load. The values of the local pressures are larger when the ridges are along the major axis than when the ridges are along the minor axis. Furthermore, as the loading speed increases, the pressure increases. As a result, the microgrooves are produced in the ridges and the horseshoe-shaped constrictions are formed at the ridges located around the contact edge.

Czech abstract

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

English abstract

The phenomena that occur when an elliptical steel body impacts a stationary steel plate with surface asperities are discussed through isothermal Newtonian numerical analysis using sinusoidal roughness. The ridges of the surface asperities produce large local pressures, especially at a large ellipticity ratio, when the surfaces are approaching each other under the applied load. The values of the local pressures are larger when the ridges are along the major axis than when the ridges are along the minor axis. Furthermore, as the loading speed increases, the pressure increases. As a result, the microgrooves are produced in the ridges and the horseshoe-shaped constrictions are formed at the ridges located around the contact edge.

Keywords in Czech

elastohydrodynamický film; rázové zatížení; mikrozářez; povrchové nerovnosti; rychlost zatěžování

Keywords in English

elastohydrodynamics; impact load; microgroove; surface asperity; loading speed

RIV year

2012

Released

21.12.2012

Publisher

ASME

Location

USA

ISSN

0742-4787

Volume

135

Number

1

Pages from–to

1–6

Pages count

6

BIBTEX


@article{BUT96705,
  author="Motohiro {Kaneta} and Ivan {Křupka} and Martin {Hartl},
  title="Pressure Increase in Elliptical Impact Elastohydrodynamic Lubrication Contacts With Longitudinal Asperities",
  year="2012",
  volume="135",
  number="1",
  month="December",
  pages="1--6",
  publisher="ASME",
  address="USA",
  issn="0742-4787"
}