非对称焊接接头断裂场及其复合因子参数

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基金项目:

教育部激光技术国家重点实验室高级访问学者基金资助项目(2000101)

Unsymmetrical Crack-Tip Stress-Strain Field and Its Engineering Treatment Method of Mixity Parameters of Welded Joint

1. School of Material Science and Engineering, Xi'an University of Technology, 710048, China;
2. State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan, 430074, China

摘要: 结合裂纹尖端位移场的分布规律,讨论了熔合线含裂纹焊接接头的模型复合因子M^p的计算途径以及焊接接头裂纹尖端位移(COD)断裂参量的分解情况。应用有限元方法分析了不同载荷作用下,熔合线含裂纹焊接接头Ⅰ+Ⅱ模型复合裂纹的复合角φ值,并对数值解的结果进行了曲线拟合与线性回归,得到了模型复合型非对称应力应变场焊接接头复合角的工程计算途径。
- 有限元 /
- Ⅰ+Ⅱ型裂纹 /
- 焊接接头 /
- 复合因子 /
- 复合角
Abstract: Considering the stress-strain field distribution rules of welded joint containing a crack on fusion line,the calculation procedures of mixity parameter M^P is discussed on unsymmetrical strain-stress yield.And furthermore,the fracture parameter COD is decomposed into two parts of modeⅠand ModeⅡ components.By the finite element method,the mixity angle φ of mixed-mode is calculated and the result is analyzed on the condition of different lording levels.In the end,for the engineering treatment,the calculating method of the mixity angle φ,which can be used for the mixed mode of the asymmetric cracked stress-strain field of welded joints,are given also.
- Finite element method /
- Ⅰ+Ⅱmode crack /
- Welded joint /
- Mixity parameter /
- Mixity angle