| 搅拌头机械载荷在搅拌摩擦焊接中的作用的数值分析 |
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| 引用本文： | 鄢东洋,史清宇,吴爱萍. 搅拌头机械载荷在搅拌摩擦焊接中的作用的数值分析[J]. 金属学报, 2009, 45(8) |
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| 作者姓名： | 鄢东洋 史清宇 吴爱萍 |
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| 作者单位： | 清华大学机械工程系,北京,100084;European Aeronautic Defence and Space Company(EADS)Innovation Works,Munich 81663,Germany |
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| 基金项目： | 国家自然科学基金项目50875146和国家高技术发展计划项目2006AA042139资助 |
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| 摘 要： | 利用数值模拟技术分析搅拌头机械载荷在焊接过程中的作用,通过对比只考虑热载荷,考虑热载荷和搅拌头的下压力,综合考虑热载荷、搅拌头下压力和工作扭矩三种条件下的应力,应变和变形,结果发现,搅拌头下压力使焊后残余应力值大幅下降;搅拌头的工作扭矩是焊后残余应力、应变不对称分布的重要影响因素;并且搅拌头机械载荷使得薄板焊后残余变形的模式发生了完全相反的变化,由不考虑搅拌头载荷时的马鞍状变成了反马鞍状.
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| 关 键 词： | 搅拌摩擦焊 数值模拟 残余应力 残余应变 残余变形 |
NUMERICAL ANALYSIS ON THE FUNCTIONS OF STIR TOOL'S MECHANICAL LOADS DURING FRICTION STIR WELDING |
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| YAN Dongyang,SHI Qingyu,WU Aiping,Juergen Silvanus. NUMERICAL ANALYSIS ON THE FUNCTIONS OF STIR TOOL'S MECHANICAL LOADS DURING FRICTION STIR WELDING[J]. Acta Metallurgica Sinica, 2009, 45(8) |
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| Authors: | YAN Dongyang SHI Qingyu WU Aiping Juergen Silvanus |
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| Abstract: | Besides lower welding temperature and solid phase welding process,another significant difference between friction stir welding and conventional fusion welding(FSW) is that the forming of weld scam in FSW is effected by both thermal load and mechanical loads of stir tool.However,the definite functions of mechanical loads of stir tool in FSW process are not clearly described.With FSW experiments,only the material flow around stir tool can be observed,from which the results were obtained that the mechanical lo... |
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| Keywords: | friction stir welding numerical simulation residual stress residual strain residual distortion |
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