| 引用本文: | 张利国,孟庆国,姬书得,栾国红,柴鹏.轴肩结构对搅拌摩擦焊过程中材料流动的影响[J].材料科学与工艺,2012,20(3):99-102.DOI:10.11951/j.issn.1005-0299.20120319. |
| ZHANG Li-guo,MENG Qing-guo,JI Shu-de,LUAN Guo-hong,CHAI Peng.Effect of the shoulder geometry of rotational tool on material flow behavior in friction stir welding[J].Materials Science and Technology,2012,20(3):99-102.DOI:10.11951/j.issn.1005-0299.20120319. |
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| 摘要: |
| 考虑材料参数随温度的变化关系以及搅拌头的实际结构形式，利用ANSYS FLUENT软件对搅拌摩擦焊过程中材料的流动行为进行了数值分析，研究了轴肩结构分别为平面、内凹与同心圆时的材料流动规律.研究表明，当轴肩结构发生变化时，焊件表面及内部的材料流动趋势基本相同；靠近焊件表面的材料流动速度在轴肩结构为同心圆时最大，在轴肩结构为平面时最小.从避免搅拌摩擦焊根部缺陷的角度看，同心圆轴肩的搅拌头优于内凹轴肩，这一规律得到了试验证实. |
| 关键词: 搅拌摩擦焊 轴肩结构 材料流动 数值分析 |
| DOI：10.11951/j.issn.1005-0299.20120319 |
| 分类号:TG453 |
| 基金项目:航空科学基金资助项目(2009ZE54011) |
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| Effect of the shoulder geometry of rotational tool on material flow behavior in friction stir welding |
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ZHANG Li-guo, MENG Qing-guo, JI Shu-de, LUAN Guo-hong, CHAI Peng
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Liaoning General Aviation Academy,Shenyang Aerospace University,Shenyang 110136,China
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| Abstract: |
| Considering the practical geometry of rotational tool and the relation between the material properties and temperature,the effect of shoulder geometry on material plastic flow behavior in friction stir welding is simulated by the ANSYS FLUENT software.In the simulation,the plane shoulder,the inner-concave-flute shoulder and the concentric-circles-flute shoulder are studied.The results show that the change of shoulder geometry nearly has no effect on the trend of material flow.For the material flow velocity,the value of the concentric-circles-flute shoulder is the biggest,while that of the plane shoulder is the smallest.For avoiding root defect,the rotational tool with concentric-circles-flute shoulder is better than that with inner-concave-flute shoulder,which is verified by experiment. |
| Key words: friction stir welding tool shoulder geometry material flow numerical simulation |
