Effect of Welding Defects on Fatigue Properties of SWA490BW Steel Cruciform Welded Joints

被引：3
作者：
Xu, Xingyuan [1 ]
Xie, Liyang [1 ]
Zhou, Song [2 ]
An, Jinlan [2 ]
Huang, Yanqing [2 ]
Liu, Youcheng [3 ]
Jin, Lei [3 ]
机构：
[1] Northeastern Univ, Sch Mech Engn & Automation, Shenyang 110004, Peoples R China
[2] Shenyang Aerosp Univ, Key Lab Fundamental Sci Natl Def Aeronaut Digital, Shenyang 110136, Peoples R China
[3] Shenyang Aerosp Univ, Sch Mech & Elect Engn, Shenyang 110006, Peoples R China
来源：
MATERIALS | 2023年 / 16卷 / 13期
基金：
中国国家自然科学基金;
关键词：
welded joints; defect; fatigue limit; stress concentration factor;
D O I：
10.3390/ma16134751
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Welding is prone to several defects. To test the fatigue properties of the welded defective joints of high-speed rail bogies, SMA490BW steel cruciform welded joints were employed with artificial defects treatment. Consequently, fatigue tests were conducted on the specimens. Fatigue fracture morphology was studied via scanning electron microscopy. The ABAQUS (version 2022) finite element software was used to calculate the stress distribution and concentration factor of cruciform welded joints with defects. The results show that the fatigue limits of 1 and 2.4 mm defect specimens were approximately 57.2 and 53.75 Mpa, respectively. Furthermore, the stress concentration factor of no, 1 mm, and 2.4 mm defects were 2.246, 4.441, and 6.684, respectively, indicating that the stress concentration factor of 1 and 2.4 mm defects increased by 98 and 198%, respectively, with respect to the no-defect case.
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页数：8
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