| Finite element analysis of free expansion of aluminum alloy tube under magnetic pressure |
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| 引用本文： | 于海平 李春峰. Finite element analysis of free expansion of aluminum alloy tube under magnetic pressure[J]. 中国有色金属学会会刊, 2005, 15(5): 1040-1044 |
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| 作者姓名： | 于海平 李春峰 |
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| 作者单位： | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| 摘 要： | A link between the electromagnetic code, ANSYS/Emag and the structural code, Ls-dyna was developed, and the numerical modeling of electromagnetic forming for aluminum alloy tube expansion was performed by means of them （discharge energy 0.75 kJ）. A realistic distribution of magnetic pressure was calculated. The calculated values of displacement along the tube axis and versus time are in very good agreement with the measured ones. The maximum strain rate is 1 122 s^-1, which is not large enough to change the constitutive equations of aluminum alloy. With the augment of discharge energy （0. 5 - 1.0 kJ）, the relative errors of the maximum deformation increase from 2.93 % to 11.4 %. Therefore, coupled numerical modeling of the electromagnetic field and the structural field should be performed to investigate the electromagnetic forming with larger deformation.
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| 关 键 词： | 铝合金 有限元分析 磁性压力 动力分析 金属压力加工 拉制工艺 线材 |
| 文章编号： | 1003-6326（2005）05-1040-05 |
| 收稿时间： | 2005-01-16 |
| 修稿时间： | 2005-04-26 |
Finite element analysis of free expansion of aluminum alloy tube under magnetic pressure |
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| YU Hai-ping,LI Chun-feng. Finite element analysis of free expansion of aluminum alloy tube under magnetic pressure[J]. Transactions of Nonferrous Metals Society of China, 2005, 15(5): 1040-1044 |
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| Authors: | YU Hai-ping LI Chun-feng |
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| Abstract: | A link between the electromagnetic code, ANSYS/Emag and the structural code, Ls-dyna was developed, and the numerical modeling of electromagnetic forming for aluminum alloy tube expansion was performed by means of them (discharge energy 0.75 kJ). A realistic distribution of magnetic pressure was calculated. The calculated values of displacement along the tube axis and versus time are in very good agreement with the measured ones.The maximum strain rate is 1 122 s-1, which is not large enough to change the constitutive equations of aluminum alloy. With the augment of discharge energy (0. 5 - 1.0 kJ), the relative errors of the maximum deformation increase from 2.93% to 11.4%. Therefore, coupled numerical modeling of the electromagnetic field and the structural field should be performed to investigate the electromagnetic forming with larger deformation. |
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| Keywords: | electromagnetic forming finite element analysis magnetic pressure strain rate |
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