Fatigue Life Assessment of Cruciform Welded Joints Based on Interval Dissipation Energy Method

Authors

  • Liuping WANG Department of Mechanical Engineering, Hunan University of Technology
  • Zhengshun NI Department of Mechanical Engineering, Hunan University of Technology
  • Rui MING Department of Mechanical Engineering, Hunan University of Technology
  • Yingang XIAO Department of Mechanical Engineering, Hunan University of Technology
  • Yongqiang LI Department of Mechanical Engineering, Hunan University of Technology
  • Zhonglin HUANG Zhuzhou Guochuang Rail Technology Co. Ltd
  • Ningning LIAO Zhuzhou Guochuang Rail Technology Co. Ltd
  • Chengji MI Department of Mechanical Engineering, Hunan Unversity of Technology

DOI:

https://doi.org/10.5755/j02.mech.34796

Keywords:

energy dissipation, fatigue life prediction, cruciform welded joints, interval method

Abstract

In order to take uncertain factors of welding process into account, a dissipated energy-based interval fatigue life estimation approach is presented in this paper. The infrared thermography fatigue life tests are conducted on the specimens of butt welded joints and cruciform welded joints. Then, the dissipated energy-based interval fatigue life prediction model is built, while interval fatigue parameters are determined and interval curve of asymptotic dissipated energy and fatigue life is obtained. The lifetime assessment of cruciform welded joints based on the suggested model is performed, and the predicted results agree well with the experimental data.

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Published

2024-06-28

Issue

Vol. 30 No. 3 (2024)

Section

MECHANICS OF SOLID BODIES

License

Copyright (c) 2024 Mechanics

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.