Abstract
Transient adhesion effects in rolling–sliding contacts influence all aspects of train–track interaction. This is of high importance specifically when these effects result in critically low adhesion, which poses a risk to traction and braking of railway vehicles. This study presents a model that can replicate the transient changes of the coefficient of adhesion with tested water and solid particle mix. The experimental data for the model are measured using a commercial ball-on-disc tribometer. The experimental results showed a liquid reservoir in front of the contact area that slowly reduces in size. This observation was used in the modelling approach to divide the calculation into two stages where the reservoir is present and when it disappears. The model was able to reproduce the occurrence of low adhesion region seen in experimental results with different particle concentrations.
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22 April 2024
An Erratum to this paper has been published: https://doi.org/10.1007/s40544-024-0913-4
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Acknowledgments
The publication was partially written at Virtual Vehicle Research GmbH in Graz, Austria. The authors would like to acknowledge the financial support within the COMET K2 Competence Centers for Excellent Technologies from the Austrian Federal Ministry for Climate Action (BMK), the Austrian Federal Ministry for Labour and Economy (BMAW), the Province of Styria (Dept. 12) and the Styrian Business Promotion Agency (SFG). The Austrian Research Promotion Agency (FFG) has been authorised for the programme management.
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Daniel KVARDA. He is an assistant professor at the Faculty of Mechanical Engineering, Brno University of Technology, Czech Republic. His work is focused on experimental and numerical studies of friction management products for wheel–rail interface.
Alexander MEIERHOFER. He is a lead researcher in Rail Systems group at Virtual Vehicle Research GmbH, Australia. His work is focused on simulating tribological aspects of wheel–rail contact.
Klaus SIX. He is a key researcher in Rail Systems group at Virtual Vehicle Research GmbH, Australia. His work is focused on understanding and simulating tribological aspects of wheel–rail contact and vehicle–track interaction. Since 2018, he is a visiting professor at The University of Sheffield, UK, in the field of wheel–rail tribology.
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Kvarda, D., Meierhofer, A. & Six, K. Testing and modelling of transient adhesion phenomena in rolling-sliding contacts. Friction 12, 1016–1027 (2024). https://doi.org/10.1007/s40544-023-0825-8
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DOI: https://doi.org/10.1007/s40544-023-0825-8