熔合线上含裂纹的不等组配焊接接头裂端场及其断裂参量分析(Ⅱ)

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)

Analysis of crack-tip stress-strain field and fracture parameter of welded joints containing crack on fusion line (II)

1.
Xi'an University of Technology, Xi'an 710048, China;State Key Laboratory of Laser Technology(Huazhong University of Science and Technology), Wu han 430074, China
2.
Xi'an University of Technology, Xi'an 710048, China
3.
State Key Laboratory of Laser Technology(Huazhong University of Science and Technology), Wu han 430074, China

摘要: 对熔合线上含裂纹的焊接接头,应用有限元方法分析了其模型复合型裂纹的裂纹张开位移(COD)断裂参量与材料组配的关系。结合裂端的位移场的分布,对焊接接头COD断裂参量的分解进行了讨论。更进一步,对不同载荷作用下,熔合线含裂纹焊接接头Ⅰ模型与Ⅱ模型裂纹,即Ⅰ+Ⅱ型复合裂纹的COD断裂参量的Ⅰ型和Ⅱ型分量D_I和D_II值进行了数值计算,并对数值解的结果进行了曲线拟合和线性回归,得到了焊接接头的COD断裂参量工程计算方法。
- 有限元 /
- 裂纹 /
- 焊接接头 /
- 设计曲线法
Abstract: By finite element method, the relationships between the fracture parameter of CTOD and the mismatch parameter of welded joints are studied on the condition of the mixed-Mode crack of the welded joints which contain a single-edge crack on the fusion line. Considering the distribution of strain-stress field at the tip of a crack, the parameters of CTOD components are decomposed. Moveover, the displacement-component of Mode Ⅰand of ModeⅡ are calculated for the different load levels. In the end, the calculated results are analysed and the engineering treatments methods of the fracture parameter of CTOD of welded joints are also proposed.
- finite element method(FEM) /
- I+II Mode crack /
- welded joint /
- the Devised-Curve Method

1.	洪海涛，王璐，王学龙，邵岳锐. 变极性等离子弧焊接电弧光谱数据的预处理算法. 内蒙古工业大学学报(自然科学版). 2021(02): 120-126 . 百度学术
2.	张勇，唐家成，葛泽龙，杨泽宇，綦秀玲. 高铝粉煤灰活性剂影响TIG电弧行为研究. 材料科学与工艺. 2020(05): 90-96 . 百度学术
3.	董康，吴强. 电弧增材制造过程在线监测技术研究现状与趋势. 表面工程与再制造. 2019(02): 23-27 . 百度学术