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Effects of root gap on anti-fatigue properties of fillet welds for a tie rod seat of locomotive bogie

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Abstract

Root gap of fillet welds can not be fully controlled in a real welding scenario, while engineers in the industry must provide reasonable maintenance solutions for gaps with different size. Following standard working loads of the International Union of Railways, influences of the dimensions of root gap on the maximum stress amplitude (AMAX) in fillet weld were analyzed. It is found that: 1) The position of the maximum AMAX value calculated based on the standard working conditions coincides with the position of actual fatigue crack; 2) Fillet welds with root gaps of typical size have more than double the AMAX values of fillet welds without root gaps; 3) By using Goodman fatigue limit diagram, the specific disposal scheme of root gap with varying dimensions was determined. These results have a general guiding significance for improving the fatigue properties of structures containing fillet welds.

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Abbreviations

H :

Height of root gap

W :

Width of root gap

L :

Length of root gap

AMAX :

Maximum stress amplitude

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Acknowledgements

This work was supported by the National Thousand Talents Program of P. R. China (Grant No. WQ2017610446).

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Miao-Xia Xie & Qi-Ke Xin

  2. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, China

    Jian Long, Lin-Jie Zhang & Suck-Joo Na

  3. Department of Mechanical Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea

    Suck-Joo Na

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  1. Miao-Xia Xie
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Correspondence to Miao-Xia Xie.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Additional information

Miao-Xia Xie is an Associate Professor of the School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an, China. She received her Ph.D. in Mechanical Engineering from Xi’an Jiaotong University. Her research interests include fatigue strength, vibration and noise control.

Qi-Ke Xin is studying for a master’s degree at the School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an, China. His research interests include residual stress and deformation, fatigue strength, vibration and noise control.

Jian Long is an Assistant Professor of the School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, China. He received his Ph.D. in Materials Processing Engineering from Xi’an Jiaotong University. His research interests include residual stress and fatigue strength of welded structures.

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Xie, MX., Xin, QK., Long, J. et al. Effects of root gap on anti-fatigue properties of fillet welds for a tie rod seat of locomotive bogie. J Mech Sci Technol 38, 187–199 (2024). https://doi.org/10.1007/s12206-023-1216-9

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  • DOI: https://doi.org/10.1007/s12206-023-1216-9

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