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Effect of the presence of moisture at the wheel-rail interface during dew and damp conditions
Univ Sheffield, Dept Mech Engn, Sheffield, S Yorkshire, England..
SLL, Stockholm, Sweden..
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).ORCID iD: 0000-0003-2489-0688
Univ Sheffield, Dept Mech Engn, Sheffield, S Yorkshire, England..
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2018 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 232, no 4, p. 979-989Article in journal (Refereed) Published
Abstract [en]

Incidents involving low levels of adhesion between the wheel and rail are a recurrent issue in the rail industry. The problem has been mitigated using friction modifiers and traction enhancers, but a significant number of incidents still occur throughout the year. This study looks at the environmental conditions that surround periods of low adhesion in order to provide an insight into why low adhesion events occur. Network Rail Autumn data, which provided details on the time and location of low adhesion incidents, were compared against weather data on a national and then local scale. Low adhesion incidents have often been attributed to contamination on the rails, such as organic leaf matter, but these incidents also occur when no contamination is visible. The time, date and location of incidents were linked to local weather data to establish any specific weather conditions that could lead to these events. The effects of precipitation, temperature and humidity on rails were analysed in order to further the understanding of low adhesion in the wheel-rail contact, which will lead to adopting better methods of mitigating this problem.

Place, publisher, year, edition, pages
Sage Publications, 2018. Vol. 232, no 4, p. 979-989
Keywords [en]
Wheel-rail interaction, tribology, railways, low adhesion, dew
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:kth:diva-226778DOI: 10.1177/0954409717706251ISI: 000429914700003OAI: oai:DiVA.org:kth-226778DiVA, id: diva2:1203767
Note

QC 20180504

Available from: 2018-05-04 Created: 2018-05-04 Last updated: 2018-06-04Bibliographically approved

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Olofsson, Ulf

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Machine Design (Dept.)
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Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)

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