质量放大因子对搅拌摩擦焊接插入过程的影响

基金项目: 西北工业大学创新基金资助项目(2007KJ01005);西北工业大学翱翔之星计划资助项目;教育部留学回国人员科研启动基金资助项目(N9YK0003);教育部新世纪优秀人才计划资助项目(NECT-08-0463)

Effects of mass scaling factor on the plunge stage of friction stir welding

Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi'an 710072, China

摘要: 质量放大因子是显式有限元计算过程中的一个重要因素.文中通过研究质量放大因子对搅拌摩擦焊接插入过程温度场的影响,优化了搅拌摩擦焊接过程温度场的三维显式有限元计算方法.在文中的计算条件下,当质量因子为10⁶时能获得比较合理的温度场,而计算所需时间明显减少.模拟温度与文献试验数据吻合较好.结果表明,质量放大因子对搅拌工具的下移距离和计算时间有较大影响.
- 搅拌摩擦焊 /
- 插入过程 /
- 显式有限元方法 /
- 质量放大因子 /
- 温度场
Abstract: Mass scaling factor is one of important parameters in an explicit finite element analysis. Effect of the mass scaling factor on the temperature field of the plunge stage in friction stir welding (FSW) was studied, and the optimization of 3D explicit finite element analysis of FSW was obtained. Results show that the mass scaling factor has a significant influence on the computation time and the displacement of the tool. A reasonable temperature field can be obtained with less computation time when the mass scaling factor is 10⁶. Furthermore, the simulated temperature data corresponds well with the experimental data from the literature.
- friction stir welding /
- plunge stage /
- explicit finite element method /
- mass scaling actor /
- temperature field