Numerical Study of Mixed-mode Stress Intensity Factor of Surface Crack of Welded Joint

被引：0
|
作者：
Jie Z. [1 ]
Li Y. [1 ]
Wei X. [1 ]
Yang G. [1 ]
Luo P. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
| 2017年 / Science Press卷 / 39期
关键词：
An interaction integral method; Crack shape ratio; Mixed-mode stress intensity factor; Weld inclination angle; Welded joint;
D O I：
10.3969/j.issn.1001-8360.2017.02.018
中图分类号：
学科分类号：
摘要：
With a cruciform welded joint taken as an example, the results of stress intensity factors of surface crack calculated by ABAQUS, FRANC3D and code formula were compared. The accuracy and efficiency of stress intensity factors calculated by FRANC3D were verified. In order to study the influencing factors of mixed-mode stress intensity factor of the surface crack of welded joint under complex stress fields from numerical theory, models with different crack shape ratios and inclination angles of weld joints were built based on FRANC3D.The results showed that the intensity factors of modes I and III decreased and the intensity factors of mode II increased with the increase of weld inclination angles. When the weld inclination angles were 0° and 15°, the effects of mode II and III stress intensity factors of the deepest and surface points of surface crack can be ignored.The effects of the absolute values of modes II and III stress intensity factors on fatigue crack growth were considered. © 2017, Editorial Office of Journal of the China Railway Society. All right reserved.
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页码：127 / 133
页数：6
相关论文
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