Publication detail

Experimental study of real roughness attenuation in rolling-sliding concentrated contacts

ŠPERKA, P. KŘUPKA, I. HARTL, M.

Original Title

Experimental study of real roughness attenuation in rolling-sliding concentrated contacts

Type

journal article in Web of Science

Language

English

Original Abstract

A surface roughness attenuation approach based on the Fourier decomposition of surface roughness into harmonic components may allow predictions of the behavior of real rough surfaces within concentrated lubricated contacts. Recent experiments performed under pure rolling conditions have shown an amplitude reduction of different components that agreed well with the data predicted by the theory. This study represents the next step in the experimental verification of the surface roughness attenuation approach under rolling/sliding conditions. Obviously, the behavior of roughness in the rolling/sliding elastohydrodynamic (EHD) contacts is more complex than for pure rolling. It has been theoretically suggested by other researchers that the modification of the original roughness alone cannot explain all of the major effects that significantly affect film thickness, and a model was proposed in which, along with the roughness attenuation, a complementary wave was generated in the inlet region and moved at the entrainment speed. This paper is focused on the possibility of extracting complementary waves from experiments with real rough surfaces conducted under rolling/sliding conditions and of determining whether the amplitudes of the complementary wave can be determined. This represents the first attempt to study both effects of rough surface behavior separately. The complementary wave was extracted from the measured data by subtracting the attenuated original roughness from the measured film thickness. Although the experimental results were quite scattered, a trend similar to that of the theoretical curves was observed. Based on the results, it can be suggested that the significance of the complementary wave is comparable to the attenuation principle.

Keywords

elastohydrodynamic lubrication; roughness attenuation; rolling-sliding

Authors

ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

RIV year

2012

Released

15. 2. 2012

Publisher

Elsevier

Location

EU

ISBN

0301-679X

Periodical

Tribology International

Year of study

46

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

14

Pages to

21

Pages count

8

BibTex

@article{BUT74832,
  author="Petr {Šperka} and Ivan {Křupka} and Martin {Hartl}",
  title="Experimental study of real roughness attenuation in rolling-sliding concentrated contacts",
  journal="Tribology International",
  year="2012",
  volume="46",
  number="1",
  pages="14--21",
  doi="10.1016/j.triboint.2011.06.006",
  issn="0301-679X"
}