Stress-strain analysis of rotary arc welding of corner joint based on external restraint
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摘要: 为探究旋转电弧角焊焊接残余应变分布规律，控制工件变形，分析对比了三维多体耦合模型与外拘束力模型两种拘束模型下工件残余应力与变形.首先，设定模型间的接触关系，建立了由焊件、工作台和夹具组成的三维多体耦合模型；然后，通过设定工件上节点区域法向压力和位移约束，建立了外拘束力模型；再采用热—力直接耦合法，基于上述两种模型，运用ANSYS软件模拟了旋转电弧焊接变形，获得了两种模型下残余应变曲线，并进行试验验证.结果表明，三维多体耦合模型的焊件应变曲线更接近试验结果，并且其焊接残余应变范围及峰值均较平缓，为优化焊件装夹方式来控制旋转电弧角焊变形提供参考依据.Abstract: In order to study the residual strain distribution law of rotating arc welding, the workpiece deformation is controlled and the residual stress and strain of the workpiece under the two kinds of restraint models are compared and analyzed. Firstly, the three-dimensional multi-body coupling model composed of weldment, workstation and fixture is established by setting the contact relation between the models. Then, by setting the normal pressure and displacement constraints on the node area of the workpiece, the external restraint force based on the above two models, ANSYS software was used to simulate the deformation of the rotary arc welding. The residual stress and strain curves of the two models were obtained and verified by experiments. The results show that the strain curves of the welded parts of the three-dimensional multi-body coupling model are closer to the test results, and the residual strain range and peak value of the welds are relatively gentle, which can provide reference for optimizing the welding fixture to control the deformation of the rotary arc welding.
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[1] Lin Hairong, Wei Xing, Cheng Quan. Out-of-plane restraint of butt joint under restraint welding[J]. Transactions of the China Welding Institution, 2000, 21(4): 73 − 75
[2] 蔺海荣, 魏 星, 程 泉. 拘束焊对接接头的平面外拘束力[J]. 焊接学报, 2000, 21(4): 73 − 75 [3] Lin Hairong, Wei Xing, Feng Weiming. Restraint length and out-of -plane restraint of t joint under restranint welding[J]. Transactions of the China Welding Institution, 2002, 23(4): 69 − 71, 76
[4] 蔺海荣, 魏 星, 冯维明. 拘束焊T形接头的拘束长度与面外拘束力[J]. 焊接学报, 2002, 23(4): 69 − 71 , 76
[5] 刘 川, 张建勋, 牛 靖. 焊接动态拘束变形三维多体耦合数值模拟[J]. 机械工程学报, 2010, 46(6): 83 − 86 [6] Liu Chuan, Zhang Jianxun, Niu Jing. 3D multi-body coupling numerical simulation of welding dynamic distortion with restr-aints[J]. Journal of Mechanical Engineering, 2010, 46(6): 83 − 86
[7] 张增磊, 史清宇, 鄢东洋, 等. 夹具拘束模型在焊接过程有限元分析中的建立及应用[J]. 金属学报, 2010, 46(2): 189 − 194 [8] Zhang Zenglei, Shi Qingyu, Yan Dongyang, et al. Establish-ment and application of fixture constraint modelsin finite element analysis of welding process[J]. Acta Metallurgica Sinica, 2010, 46(2): 189 − 194
[9] Li Jun, Yang Jianguo, Yan Dejun, et al. Effect of restraint condi- tion on hot cracking during welding of 2A12T4 aluminum alloy[J]. Transactions of the China Welding Institution, 2009, 30(7): 69 − 72
[10] Schenk T, Richardson I M. A study on the influence of clamping on welding distortion[J]. Computational Materials Science, 2009, 45(4): 999 − 1005.
[11] 李 军, 杨建国, 闫德俊, 等. 2A12T4铝合金焊接时拘束条件对热裂纹的影响[J]. 焊接学报, 2009, 30(7): 69 − 72 [12] Xiao Xiaoming, Peng Yun, Zhang Jianxun, et al. Investigation of out-of-plane welding distortion in aluminumalloy welding with external restraint[J]. Transactions of the China Welding Institution, 2011, 32(5): 33 − 36
[13] Liu Zhenfei, Wang Lifang, Wu Chao, et al. Finite element analysis of the effect of copper jig on the welding thermal process and stress[J]. Welding Technology, 2015, 44(4): 13 − 17
[14] 肖晓明, 彭 云, 张建勋, 等. 拘束控制铝合金焊接面外变形行为分析[J]. 焊接学报, 2011, 32(5): 33 − 36 [15] 刘振飞, 王丽芳, 吴 超, 等. 有限元分析铜夹具对焊接热过程与应力的影响[J]. 焊接技术, 2015, 44(4): 13 − 17 [16] Zeng Zhong, Zhao Jianping. Numerical simulation about the influence of rectangular window restriction welding of 12MnNiVR steel on residual stress for large storage tank[J]. Electric Welding Machine, 2015, 45(12): 72 − 77
[17] 曾 仲, 赵建平. 大型储罐用12MnNiVR钢窗口拘束焊接对残余应力影响的数值模拟[J]. 电焊机, 2015, 45(12): 72 − 77 [18] Jia Jianping, Shi Huifei, Peng Tao. Numerical simulation of rotating arc welding temperature field based on ANSYS[J]. Welding Technology, 2011, 40(6): 14 − 17
[19] Mao Zhiwei. Jiang Yinsong, Zhou Shaoling, et al Numerical simulation on stress field of corner joint heat source model[J]. Hot Working Technology, 2016, 45(3): 193 − 196.
[20] 贾剑平, 施辉飞, 彭 桃. 基于ANSYS的旋转电弧焊接温度场的数值模拟[J]. 焊接技术, 2011, 40(6): 14 − 17 [21] 毛志伟, 姜银松, 周少玲, 等. 角接接头热源模型的应力场数值模拟[J]. 热加工工艺, 2016, 45(3): 193 − 196
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