Research progress on wheel/rail rolling contact fatigue of rail transit in China

ZHAO Xin; WEN Ze-feng; WANG Heng-yu; TAO Gong-quan; JIN Xue-song

doi:10.19818/j.cnki.1671-1637.2021.01.001

Volume 21 Issue 1

Aug. 2021

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ZHAO Xin, WEN Ze-feng, WANG Heng-yu, TAO Gong-quan, JIN Xue-song. Research progress on wheel/rail rolling contact fatigue of rail transit in China[J]. Journal of Traffic and Transportation Engineering, 2021, 21(1): 1-35. doi: 10.19818/j.cnki.1671-1637.2021.01.001

Citation:

ZHAO Xin, WEN Ze-feng, WANG Heng-yu, TAO Gong-quan, JIN Xue-song. Research progress on wheel/rail rolling contact fatigue of rail transit in China[J]. Journal of Traffic and Transportation Engineering, 2021, 21(1): 1-35. doi: 10.19818/j.cnki.1671-1637.2021.01.001

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Research progress on wheel/rail rolling contact fatigue of rail transit in China

doi: 10.19818/j.cnki.1671-1637.2021.01.001

State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

Funds:

National Natural Science Foundation of China 51675444

Project of China- CELAC United Laboratory for Rail Transit KY201701001

Independent Subject of State Key Laboratory of Traction Power 2019TPL_T17

More Information

Author Bio:
ZHAO Xin(1981-), male, associate professor, PhD, xinzhao@swjtu.edu.cn
Received Date: 2020-11-10
Publish Date: 2021-08-27

Abstract

Abstract

The wheel/rail rolling contact fatigue was systematically explained in terms of its classification, initiation mechanisms, influencing factors, consequences, as well as commonly used initiation prediction models, and the source of complexity in wheel/rail rolling contact fatigue was summarized. Related research results of wheel/rail rolling contact fatigue in China Rail Transit System in recent years were summarized. The basic characteristics, initiation mechanisms as well as countermeasures in high-speed railway, traditional railway, and metro systems were summarized, respectively. The systematic use of research approaches such as the field monitoring, failure analysis of field samples, test rig, numerical simulation, and on-line test for studying local and continuous wheel/rail rolling contact fatigue were described, together with their important results. Root causes for differences between different rail transit systems in terms of wheel/rail rolling contact fatigue and the relative importances of these factors were discussed. Finally, suggestions were provided for future studies on practical countermeasures and initiation mechanisms. Research result shows that the wheel/rail local rolling contact fatigue (crescent crack) in high-speed EMU poses controllable threats to the operation safety, and is most often caused by indentations. Excessive contact stress and creepage are critical factors causing the continuous wheel/rail rolling contact fatigue, its root causes include the sharp curve, wheel/rail profile deterioration, inappropriate designs of contact profile and track curve, steep and undulating slope, low adhesion and adhesion enhancement, frequent start and stop, and track mounting error. The severe rolling contact fatigue observed on wheels of high-power electric locomotives widely used in recent decade operating in complex conditions, is the joint manifestation of the comprehensive effect of these factors. Feasible countermeasures for the rolling contact fatigue include the prevention or timely repair of severe indentations, improving wheel and rail profile compatibility in curved sections, optimizing wheel turning and rail grinding strategies, installing or improving the wheel tread cleaner, rolling stocks turn-around operating periodically, improving the electric compensation and traction/braking control in locomotives, using high quality sands for adhesion enhancement, improving the tread braking, and timely repair of key components on tracks and trains. The appropriate countermeasures may be selected according to the characteristics of each wheel-rail system. Relating to the field countermeasure, accurate rolling contact fatigue prediction models should be developed to facilitate rolling contact fatigue infinite- and finite-life designs and the determination of optimal wheel-rail maintenance strategies for different running conditions. Relating to damage mechanisms, future studies should be focused on the microcrack propagation mechanism and the influencing mechanism of wear during the fatigue-crack initiation stage. 1 tab, 42 figs, 150 refs.
- vehicle engineering,
- wheel/rail rolling contact fatigue,
- initiation mechanism,
- countermeasure,
- high-speed railway,
- traditional railway,
- metro,
- high power electric locomotive

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References(150)

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