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M. Akama, Y. Takahashi, "The influence of rolling direction reversal on wear and RCF cracks on the wheel tread", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 21.1, 2022, doi:10.4203/ccc.1.21.1

Keywords: wheel, rolling direction reversal, wear, rolling contact fatigue, finite element analyses.

Abstract

Trains often operate as a shuttle service. When a train arrives at the terminal station, its direction of travel is reversed, and therefore so is the rolling direction of the wheels. It is therefore important to investigate how the crack propagation, and wear on the wheel tread are changed by reversing the rolling direction. In this study, twin disc wear-fatigue tests were carried out under various conditions to study the effect on the behavior of rolling contact fatigue (RCF) cracks and wear. Also, finite element analyses (FEA) were performed in order to clarify the results of these tests. In the lubricated condition, the cumulative wear tended to increase when the rolling direction of the wheel specimen was reversed if the slip ratio was 1%. On the other hand, in the dry condition, there was almost no change in the wear before and after reversing. FEA suggested that, when the wheel specimen was reversed, lubricant was trapped in the RCF crack and the friction coefficient between the crack faces was reduced, leading to shear mode crack growth and increased fatigue wear.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 21.1 The influence of rolling direction reversal on wear and RCF cracks on the wheel tread M. Akama¹ and Y. Takahashi² ¹Department of Mechanical Engineering for Transportation, Osaka Sangyo University, Osaka, Japan ²TESS Co., Ltd. Tokyo, Japan doi:10.4203/ccc.1.21.1 Full Bibliographic Reference for this paper M. Akama, Y. Takahashi, "The influence of rolling direction reversal on wear and RCF cracks on the wheel tread", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 21.1, 2022, doi:10.4203/ccc.1.21.1 Keywords: wheel, rolling direction reversal, wear, rolling contact fatigue, finite element analyses. Abstract Trains often operate as a shuttle service. When a train arrives at the terminal station, its direction of travel is reversed, and therefore so is the rolling direction of the wheels. It is therefore important to investigate how the crack propagation, and wear on the wheel tread are changed by reversing the rolling direction. In this study, twin disc wear-fatigue tests were carried out under various conditions to study the effect on the behavior of rolling contact fatigue (RCF) cracks and wear. Also, finite element analyses (FEA) were performed in order to clarify the results of these tests. In the lubricated condition, the cumulative wear tended to increase when the rolling direction of the wheel specimen was reversed if the slip ratio was 1%. On the other hand, in the dry condition, there was almost no change in the wear before and after reversing. FEA suggested that, when the wheel specimen was reversed, lubricant was trapped in the RCF crack and the friction coefficient between the crack faces was reduced, leading to shear mode crack growth and increased fatigue wear. download the full-text of this paper (PDF, 7 pages, 657 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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