Preload loss of high-strength bolts in friction connections considering corrosion damage and fatigue loading

被引:21
|
作者
Jiang, Chao [1 ]
Xiong, Wen [1 ]
Cai, C. S. [1 ,2 ]
Zhu, Yichen [1 ]
Wang, Jia [1 ]
机构
[1] Southeast Univ, Sch Transportat, Dept Bridge Engn, Nanjing 211189, Peoples R China
[2] Louisiana State Univ, Dept Civil & Environm Engn, Baton Rouge, LA 70803 USA
基金
美国国家科学基金会;
关键词
High-strength bolt; Preload loss; Fatigue; Corrosion; Double lap connection; CLAMPING FORCE; BEHAVIOR; RELAXATION; JOINTS; LIFE;
D O I
10.1016/j.engfailanal.2022.106416
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The preload loss of high-strength bolts in friction connections was investigated considering the corrosion damage and fatigue loading. Double lap connections were assembled and the ultrasonic measurement method was employed to obtain the real-time preload of the bolts. Accelerated corrosion tests of specimens were used to achieve four corrosion levels and the and the corresponding weight loss ratio of the specimens varied from 0 to 10.1%. Fatigue test was then performed on eight corroded connections. The preload change of bolts after installation, corrosion tests, and certain number of load cycles was measured. It is found that the corrosion effects on the bolt preload loss was significant, and an average value of 41.2% preload loss was observed for specimens of 10% weight loss. The influence of fatigue load on the preload loss after unloading could be ignored, but the combination of tensile loading, fatigue loading, and corrosion damage could lead to an up to 11% preload loss.
引用
收藏
页数:13
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