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作者:

Sun, Guo-Qin (Sun, Guo-Qin.) (学者:孙国芹) | Fu, Zhen-Hao (Fu, Zhen-Hao.) | Yang, Shuai (Yang, Shuai.) | Wang, Xue-Zheng (Wang, Xue-Zheng.) | Shang, De-Guang (Shang, De-Guang.) | Chen, Shu-Jun (Chen, Shu-Jun.)

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Scopus SCIE

摘要:

The fatigue failure rule of 7075-T651 aluminum alloy stir welded joint is studied under two-stage variable amplitude loading by fatigue experiments and finite element simulation. The results show that the friction stir welding (FSW) joints have different weak areas under different loading conditions. The fracture position of the FSW joint is related to the loading sequence of variable amplitude load and cycle number. The cycle number and crack length under the first-stage loading influence the fatigue life and fracture location of the FSW joints. When the cycle ratio of the first-stage loading is 70 similar to 80%, the fracture position of the corresponding specimen does not change. The simulation results show that the corresponding cycle ratios of critical damage under low-high load and high-low load are 77.8% and 74.4%, respectively, which are consistent with the experimental results. When the crack length is greater than 400 mu m under low-high load, or when the crack length is greater than 500 mu m under high-low load, the crack location does not change.

关键词:

Crack propagation Variable amplitude load Friction stir welding joint Fatigue weak area

作者机构:

  • [ 1 ] [Sun, Guo-Qin]Beijing Univ Technol, Coll Mech & Energy Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Fu, Zhen-Hao]Beijing Univ Technol, Coll Mech & Energy Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Yang, Shuai]Beijing Univ Technol, Coll Mech & Energy Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Shang, De-Guang]Beijing Univ Technol, Coll Mech & Energy Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Chen, Shu-Jun]Beijing Univ Technol, Coll Mech & Energy Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Wang, Xue-Zheng]Shandong First Med Univ, Dept Med Image, Affiliated Hosp 2, Tai An 271016, Peoples R China

通讯作者信息:

  • [Sun, Guo-Qin]Beijing Univ Technol, Coll Mech & Energy Engn, Beijing 100124, Peoples R China;;[Wang, Xue-Zheng]Shandong First Med Univ, Dept Med Image, Affiliated Hosp 2, Tai An 271016, Peoples R China;;

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来源 :

WELDING IN THE WORLD

ISSN: 0043-2288

年份: 2024

期: 1

卷: 69

页码: 113-124

2 . 1 0 0

JCR@2022

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