An improved life prediction model of corrosion fatigue for T-welded joint

被引：19
|
作者：
Liao, Xiaoxuan [1 ]
Qiang, Bin [1 ]
Wu, Jun [1 ]
Yao, Changrong [1 ]
Wei, Xing [1 ]
Li, Yadong [1 ,2 ]
机构：
[1] Southwest Jiaotong Univ, Dept Bridge Engn, Chengdu 610031, Sichuan, Peoples R China
[2] Southwest Jiaotong Univ, Natl Engn Lab Technol Geol Disaster Prevent Land, Chengdu 611756, Sichuan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 152卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Life prediction model; Corrosion fatigue; S-N curve; Continuum damage mechanics; T-welded joint; G20MN5QT CAST STEEL; HIGH-CYCLE FATIGUE; BEHAVIOR; STRESS; GROWTH;
D O I：
10.1016/j.ijfatigue.2021.106438
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Fatigue and corrosion fatigue tests were conducted for T-welded joint specimens. The test results show that the corrosive environment greatly reduces the fatigue life of the specimens. The average reduction percentage under different stress ranges Delta sigma were 47.7% (Delta sigma = 172.5MPa), 58% (Delta sigma = 216MPa) and 45.7% (Delta sigma = 258MPa) respectively. Based on Continuum Damage Mechanics (CDM), a corrosion fatigue life prediction model considering the coupling effects of corrosion environment and cyclic load was proposed. This prediction model can predict the corrosion fatigue life of present T-welded joint specimens and other specimens reported in previous researches, showing rationality and versatility.
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页数：9
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