Fatigue Performance Analysis of Bogie Welded Joints Based on Notch Stress Method

被引：0
|
作者：
Liu X. [1 ]
Zhou C. [2 ]
Zhang K. [1 ]
Yao Y. [1 ]
机构：
[1] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu
[2] Rail Transit Engineering Department, Chengdu Vocational & Technical College of Industry, Chengdu
来源：
| 2017年 / Science Press卷 / 39期
关键词：
IIW standard; Notch stress concentration factor; Notch stress method; S-N curve; Welded joints;
D O I：
10.3969/j.issn.1001-8360.2017.03.008
中图分类号：
学科分类号：
摘要：
The notch stress method, as a new method for fatigue design of welded structure, is widely used for its higher accuracy. Considering the absence of a reliable notch fatigue life curve in the vehicle welded structure, the paper, based on the data provided by the current fatigue test of bogie welded joints, carried out the notch fatigue analysis. Nominal stress data of fatigue test were derived from two welded joint specimens produced by common bogie materials S355J2 in the framework, including butt joints with low notch effect and cruciform joints with high notch effect. By adopting an empirical formula method and a finite element method, the paper analyzed the notch concentration factors of weld toe and weld root and established the notch fatigue curve of bogie welded joints by combining with nominal stress data in the fatigue test. By making a comparison with the notch fatigue curve FAT225 recommended by IIW standard, this curve has a considerable fatigue class and smaller slope of curve. Moreover, it proved that the notch stress method has smaller dispersibility than the normal stress method, from the perspective of diversity factor. © 2017, Editorial Office of Journal of the China Railway Society. All right reserved.
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页码：42 / 48
页数：6
相关论文
共 12 条
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