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Tribology - Materials, Surfaces & Interfaces

CM2019 Special Issue

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The wheel/rail interface is perhaps the most important aspect of a railway network as what happens here dictates train performance and whether it can meet timetable requirements; safety, particularly in low friction conditions and it drives damage mechanisms in wheels and rails which impacts on maintenance.

The contact is typically the size of a 20p coin, so a whole train is supported by a remarkably small area in total. This means that contact stresses are very high. These, along with shear in the contact, drive the creation of a deformed layer on the surface of the wheels and rails that drives damage mechanisms. The contact is extremely complex. Stress and slip conditions vary constantly as a wheel progresses down the track as the relative position of wheel on rail changes. It is also an open system so is affected by natural contamination: leaves, water, snow etc. There are a number of applied products on wheels and rails as well for friction management purposes such as sand; top-of-rail friction modifiers and grease lubricants in curves. This makes the tribology of the wheel/rail interface very hard to study and model.

The papers in this special edition resulted from the 11th International Conference on Contact Mechanics and Wear of the Rail/Wheel System held in 2018 and hosted by TUDelft in The Netherlands. They cover a range of diverse areas relating to the wheel/rail interface including measurement; experimental work and modelling across the key topics of friction; contact stress and damage caused by wear and rolling contact fatigue.

All featured articles in this special issue are free to view until March 31st, 2021, exclusively via this page. 

Article Author
Effects of oxide and water on friction of rail steel – new test method and friction mapping Reuben Kempka, Robert Falconer, Dmitry Gutsulyak & Roger Lewis
A vision-based approach for rolling contact fatigue evaluation in twin-disc tests on a railway wheel steel Ileana Bodini , Candida Petrogalli , Angelo Mazzù , Simone Pasinetti , Takanori Kato & Taizo Makino
A simplified numerical study of wheel/rail material coupling in presence of solid contaminants Angelo Mazzù , Andrea Ghidini , Nicola Zani & Michela Faccoli
Twin disc evaluation of third body materials in the wheel/rail interface Dmitry V. Gutsulyak , Louisa J. E. Stanlake & Hao Qi
Reproducing Rolling Contact Fatigue Relevant Loading Conditions of Railway Operation on a Test Rig Gerald Trummer , Stephan Scheriau , Peter Dietmaier & Klaus Six
Wear Modelling in Wheel-Rail Contact Problems based on Energy Dissipation Andrzej Myśliński & Andrzej Chudzikiewicz
Experimental evaluation of tramway track wear by means of 3D metrological optical scanners M. C. Valigi , S. Logozzo , E. Butini , E. Meli , L. Marini & A. Rindi
Evaluation of the coefficient of friction of rail in the field and laboratory using several devices M. Harmon, J. F. Santa, J. A. Jaramillo, A. Toro, A. Beagles & R. Lewis
Improved modelling of trains braking under low adhesion conditions Hamid Alturbeh , Roger Lewis , Klaus Six , Gerald Trummer & Julian Stow
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