Publication detail

Roughness Effects in Impact EHL of Elliptical Contacts

FRÝZA, J. ŠPERKA, P. KŘUPKA, I. HARTL, M.

Original Title

Roughness Effects in Impact EHL of Elliptical Contacts

Type

abstract

Language

English

Original Abstract

In engineering practice no surface is ideally smooth as well as no machine part is working under ideal steady-state conditions. Concentrated contacts in real machine elements, involving components like roller bearings, gears and cam-follower contacts, etc., are exposed to rapid transient motion in arbitrary directions due to vibrations and other dynamic motions during machine operation. The motion in normal direction to contact zone (impact loading) may have significant effect on film thickness and pressure distribution. This study presents experimental results of film thickness distribution inside elliptical contact, with roughness features oriented in a single direction, by using optical interferometry method. Impact loading is applied through precise positioning of one contact body by close-loop piezoelectric transducer. Surface roughness effects are excluded by comparing rough and smooth surface results.

Keywords

tribology, impact load, surface roughness, elliptical contact, film shape and thickness

Authors

FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Released

16. 9. 2015

Publisher

Japanese Society of Tribologists

Location

Tokyo

Pages from

971

Pages to

972

Pages count

2

BibTex

@misc{BUT117961,
  author="Josef {Frýza} and Petr {Šperka} and Ivan {Křupka} and Martin {Hartl}",
  title="Roughness Effects in Impact EHL of Elliptical Contacts",
  year="2015",
  pages="971--972",
  publisher="Japanese Society of Tribologists",
  address="Tokyo",
  note="abstract"
}