Publication detail

Effect of Friction Modifiers on Adhesion in Wheel-Rail Contact

GALAS, R. OMASTA, M. KŘUPKA, I. HARTL, M.

Original Title

Effect of Friction Modifiers on Adhesion in Wheel-Rail Contact

Type

abstract

Language

English

Original Abstract

One of the key factors in railway transportation is adhesion since it influences safety and energy efficiency of the traffic. However, the adhesion level is strongly dependent on operating and environmental conditions. Under wet conditions and when leaves are on the track, poor adhesion causes braking and traction difficulties. In this case, sanding is often used to increase adhesion. On the other hand, under dry conditions the adhesion level may be unnecessarily high; this leads to higher wear, vibrations and noise. Therefore top-of-rail friction modifiers have been developed to ensure an appropriate adhesion level. The friction modifiers are substances of complex composition that influences adhesion. The objective of this study is to investigate effect of the friction modifiers composition on the adhesion in the wheel-rail contact under dry and wet conditions. The experiments were carried out using a ball-on-disc tribometer and a twin-disc tribometer under various conditions. Traction forces have been recorded and a corresponding adhesion curves have been evaluated. The results bring further insight into the very up-to-date issue and suggest the effect of particular components of the top-of-rail friction modifiers.

Keywords

wheel-rail contact, friction modifiers, adhesion and adhesion coefficient

Authors

GALAS, R.; OMASTA, M.; KŘUPKA, I.; HARTL, M.

Released

16. 9. 2015

Publisher

Japanese Society of Tribologists

Location

Tokyo

Pages from

973

Pages to

974

Pages count

2

BibTex

@misc{BUT117976,
  author="Radovan {Galas} and Milan {Omasta} and Ivan {Křupka} and Martin {Hartl}",
  title="Effect of Friction Modifiers on Adhesion in Wheel-Rail Contact",
  year="2015",
  pages="973--974",
  publisher="Japanese Society of Tribologists",
  address="Tokyo",
  note="abstract"
}