| 摘要: |
| 采用Abaqus有限元计算软件,对摩擦螺柱焊的焊接过程进行了仿真研究.通过在Abaqus/stand算法的基础上利用Python脚本编程实现了参数化建模、网格自动重划分以及结果映射、散热边界自动选取等功能,有效解决了焊接过程中由于材料大规模非线性塑性变形导致的计算收敛困难问题.仿真计算获得的螺柱塑性变形情况与实际焊接结果基本一致,有效证明了该有限元模型的合理性.另外,通过对焊接温度场及应力场结果的分析,较好的解释了干式环境和有水环境下采用相同焊接工艺参数的焊接接头质量存在差异的现象,这对摩擦螺柱焊技术的水下应用及其工艺参数研究具有重要的指导意义. |
| 关键词: 摩擦螺柱焊 有限元 非线性 Python脚本 水下焊接 |
| DOI： |
| 分类号: |
| 基金项目:国家自然基金青年基金(51109005);北京市自然科学基金(3122016);北京市教委项目(KM201310017007) |
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| Study on simulation of underwater friction stud welding process based on Abaqus |
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GAO Hui, JIAO Xiangdong, ZHOU Canfeng, LI Guanqun
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Research Centre of Energy Engineering Advanced Joining Technology, Beijing Institute of Petrochemical Technology, Beijing 102617, China
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| Abstract: |
| The finite element simulation software Abaqus was used to study the friction stud welding process. A python script based on the Abaqus/stand algorithm has been designed, which can realize the functions of parameterization modeling, automatic remeshing, results mapping, thermal boundary automatic selection and so on. This can effectively solve the difficulty of convergence in calculation that is caused by the large scale nonlinear plastic deformation of materials. The simulation results of the plastic deformation of welded stud are basically consisted with and the experimental results effectively proving the validity of the finite element model. In addition, the analysis results of welding stress and temperature fields can explain the difference of the joint quality welded in the air and water with the same welding parameters. These works may have important guiding significance for the underwater friction stud welding application and welding process selection. |
| Key words: friction stud welding finite element nonlinear Python script underwater welding |
