6061铝合金超声辅助搅拌摩擦焊温度场分析
Analysis of temperature field of ultrasonic assisted friction stir welding of 6061 aluminum alloy
马付建 1李锡伟 1陈绍 2付典颐 3沙智华 1张生芳1
作者信息
- 1. 大连交通大学,机械工程学院,大连,116028
- 2. 中车株洲电力机车研究所有限公司,株洲,412001
- 3. 中车齐齐哈尔车辆有限公司,大连研发中心,大连,116052
- 折叠
摘要
为了分析超声振动对 6061铝合金超声辅助搅拌摩擦焊接过程温度场的影响,采用解析建模和数值模拟的方法,建立了超声辅助搅拌摩擦焊过程中接触界面摩擦系数模型和热力耦合有限元分析模型,开展了 6061铝合金超声辅助搅拌摩擦焊温度测量试验,结合有限元与试验结果进行对比分析.结果表明,仿真得到的工件表面温度分布曲线及取样点温度都与试验结果基本吻合,验证了建立模型的准确性;超声振动可以改变摩擦状态,降低焊接摩擦产热,减少峰值温度及高温区域的面积,振幅对焊接峰值温度影响的显著性高于频率.
Abstract
In order to investigate the influence of ultrasonic vibration on the temperature field of ultrasonic assisted friction stir welding of 6061 aluminum alloy,the contact interface friction coefficient model was established by analytical modeling,and the thermo-mechanical coupling finite element analysis model was established by numerical simulation.The temperature measurement experiment of ultrasonic assisted friction stir welding of 6061 aluminum alloy was carried out.By comparing the finite element analysis with the experimental results,it is found that the workpiece surface temperature distribution curve and sampling point temperature obtained by the analysis are basically consistent with the experimental results,which verifies the accuracy of the established model.The analysis results also show that ultrasonic vibration can change the friction state,reduce the welding friction heat generation,the peak temperature and the area of high temperature region.The effect of ultrasonic amplitude on welding peak temperature is more significant than frequency.
关键词
铝合金/超声辅助搅拌摩擦焊/摩擦系数/任意拉格朗日-欧拉/温度场Key words
aluminum alloy/ultrasonic assisted friction stir welding/friction coefficient/arbitrary Lagrangian Eulerian/temperature field引用本文复制引用
基金项目
国家自然科学基金资助项目(52075066)
辽宁省自然科学基金资助项目(2021-MS-295)
辽宁省教育厅基本科研项目(JYTMS20230001)
出版年
2024
NETL
NSTL
万方数据