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2020 | OriginalPaper | Chapter

New Methodology to Estimate Costs Caused by Rail Wear and RCF Depending on the Type of Running Gear

Authors: Visakh V. Krishna, Saeed Hossein-Nia, Sebastian Stichel

Published in: Advances in Dynamics of Vehicles on Roads and Tracks

Publisher: Springer International Publishing

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Abstract

A new methodology to estimate costs for wear and Rolling Contact Fatigue (RCF) on rails that cause a major portion of track maintenance costs is presented. It is demonstrated for a standard UIC-Y25 bogie and a FR8RAIL bogie, a softer and cross-braced iteration of the former. The rail profile evolution and the surface-initiated fatigue on the rail surface for different track radii with progressive tonnage are calculated using multi-body simulations. ‘Fastrip’ is used to calculate tangential stresses on the contact patch. Various non-linearities in the vehicle and track models have been considered, based on running conditions on the Swedish Iron-ore line. A cyclic rail grinding procedure at fixed tonnage intervals based on recommendations from EN13231-5 is implemented, to also account for the effect of track maintenance on the rate of rail surface damage. The wear depths (W), worn cross-sectional areas (A) and the number of axle passes that carry a risk for RCF initiation (\(N_r\)) are presented and discussed for 100 Mega Gross Tonnes passage. In doing so, the methodology addresses ‘track-friendliness’ of the running gear considering both its design and the track maintenance strategies.
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Metadata
Title
New Methodology to Estimate Costs Caused by Rail Wear and RCF Depending on the Type of Running Gear
Authors
Visakh V. Krishna
Saeed Hossein-Nia
Sebastian Stichel
Copyright Year
2020
DOI
https://doi.org/10.1007/978-3-030-38077-9_84

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