| 斜十字接头三维焊接残余应力的数值模拟 |
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| 引用本文： | 卫星,刘茂坤,肖林,赵骏铭.斜十字接头三维焊接残余应力的数值模拟[J].焊接学报,2019,40(5):48-53,78. |
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| 作者姓名： | 卫星 刘茂坤 肖林 赵骏铭 |
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| 作者单位： | 西南交通大学,成都,610031;西南交通大学,成都,610031;西南交通大学,成都,610031;西南交通大学,成都,610031 |
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| 基金项目： | 国家自然科学基金资助项目（51378431） |
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| 摘 要： | 为研究全熔透焊接十字接头残余应力空间分布特点，分析十字接头焊缝形式对焊接残余应力分布状态的影响，基于温度场和应力场间接耦合方式，对全熔透焊接十字接头残余应力开展了有限元数值模拟研究. 采用ANSYS有限元软件，选择Q345C钢材典型热力学参数，构建全熔透焊接十字接头有限元模型，分析得到焊接过程结构温度场分布. 将焊接十字接头温度场作为输入条件，基于ANSYS热–力耦合分析得到全熔透焊接斜十字接头三维残余应力场分布. 结果表明，全熔透焊接十字接头残余应力峰值主要分布在焊趾和焊根处，焊缝角度变化会对焊缝处残余应力分布带来较大影响.
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| 关 键 词： | 斜十字焊接接头 全熔透 残余应力 温度场 热—力耦合 |
| 收稿时间： | 2017/11/22 0:00:00 |
Numerical simulations of 3D residual stresses on inclined cruciform welded joints |
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| WEI Xing,LIU Maokun,XIAO Lin and ZHAO Junming.Numerical simulations of 3D residual stresses on inclined cruciform welded joints[J].Transactions of The China Welding Institution,2019,40(5):48-53,78. |
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| Authors: | WEI Xing LIU Maokun XIAO Lin and ZHAO Junming |
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| Affiliation: | Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | To investigate the three dimension distribution of residual stress on full-penetration inclined cruciform welded joints and analyze the influence of the weld form of the cross joint on welding residual stress distribution, numerical simulations of residual stress on full-penetration inclined cruciform welded joints were carried out based on the indirect coupling solving method of temperature field and stress field. Using the FE software ANSYS and choosing typical thermodynamic parameters of Q345 steel, FEM models of full-penetration inclined cruciform welded joints were build. Welding procedure was simulated and temperature fields of full-penetration inclined cruciform welded joints were obtained. The temperature fields taken as input condition, the three-dimensional residual stress fields of full-penetration inclined cruciform welded joints were obtained by using thermo-mechanical analysis in ANSYS. Research results show that the peak residual stresses occurred at the weld toe and the weld root of full-penetration inclined cruciform welded joints and the angle of weld had a significant influence on residual stresses distribution. |
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| Keywords: | inclined cruciform welded joints full-penetration residual stresses temperature field thermo-mechanical analysis |
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