A study of fatigue surface crack propagation paths of aluminum alloy butt welds using a Phased-Array Total-Focus imaging technique

被引：5

作者：

Wang, Chao ^{[1
]}

Zhu, Tao ^{[1
]}

Yang, Bing ^{[1
]}

Xiao, Shoune ^{[1
]}

Yang, Guangwu ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, State Key Lab Rail Transit Vehicle Syst, Chengdu, Peoples R China

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2024年 / 133卷

基金：

中国国家自然科学基金;

关键词：

Aluminum alloy butt welded joints; Phased -array ultrasonic total -focus imaging; Nondestructive testing (NDT); Fatigue crack propagation;

D O I：

10.1016/j.tafmec.2024.104572

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this study, the fatigue crack propagation behavior of aluminum alloy butt welds was innovatively investigated using a phased-array ultrasonic total-focus imaging nondestructive testing technique. The crack propagation path determined with the traction structural stress method was verified. The length and depth propagation pattern of the weld toe surface crack was determined based on the fatigue test and condition monitoring crack evolution data in full scale cyclic tensile loading model. The results showed that the weld toe surface crack evolves as a pattern of multiple small crack propagation fusing to converge a main crack and fail through the thickness. The condition-monitoring analysis method for surface fatigue crack propagation is proposed to improve the completeness of the fatigue crack propagation law.

引用

页数：15

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