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An alternative method for the assessment of railhead traction
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Tribologi.ORCID iD: 0000-0003-2489-0688
2011 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 271, no 1-2, 62-70 p.Article in journal (Refereed) Published
Abstract [en]

Work has been carried out to develop a fast test method for the determining of railhead traction levels. Current methods used in the field are time consuming and offer relatively little control of external or test parameters. A pendulum rig has been used for this investigation and adapted to measure railhead friction levels under various states of contamination. The rig consists of an aluminium tubular pendulum; on the end of which is a spring mounted, rubber pad (slider pad). The rig functions on the same principles as used in a Charpy impact test, i.e. energy is lost as the slider pad comes into contact with a surface (in this case the rail head). This loss in kinetic energy is measured and can be translated into a friction coefficient. Tests have been carried out to validate the placing of the contaminants on the rail prior to testing and also to determine the setup of the rig. High speed video has also been used to determine the speed of the slider. The pendulum was also tested in the field and showed good correlation in comparison with a hand pushed Tribometer. Pendulum results have been compared to those from twin disk simulations of the wheel/rail contact and good correlation can also be found.

Place, publisher, year, edition, pages
2011. Vol. 271, no 1-2, 62-70 p.
Keyword [en]
Friction, Rail, Pendulum tester, Contaminant, Friction modifier
National Category
Vehicle Engineering
URN: urn:nbn:se:kth:diva-35592DOI: 10.1016/j.wear.2010.10.035ISI: 000291777600009ScopusID: 2-s2.0-79955780243OAI: diva2:429848
QC 20110706 8th Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2009), Florence, ITALY, SEP, 2009Available from: 2011-07-06 Created: 2011-07-04 Last updated: 2011-12-15Bibliographically approved

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Olofsson, Ulf
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