Expansion of a low conductive metal tube by an electromagnetic forming process: Finite element modeling
Expansion of a low conductive metal tube by an electromagnetic forming process: Finite element modeling
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DOI：
10.3365/met.mat.2008.02.091
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发表时间：
2008-02
影响因子：
3.5
通讯作者：
C. Shin;Hyung-Ha Jin;J. G. Lee;Dong-Jin Lee;C. Rhee;Jun-Hwa Hong
中科院分区：
文献类型：
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作者：
C. Shin;Hyung-Ha Jin;J. G. Lee;Dong-Jin Lee;C. Rhee;Jun-Hwa Hong
由于电磁成形具有高的成形速率和降低残余应力的优点，因此电磁成形技术是一种很有吸引力的成形方法。EMF中的形成力是洛伦兹力。它们是由线圈中借助电容器组感应的瞬态电流与金属管中借助瞬态电流感应的涡电流之间的排斥相互作用导出的。高导电性金属适用于基于EMF的管膨胀，但低导电性金属的管通常用于工业目的。我们研究了使用电磁场来提高低导电金属的成形性的各种方法。特别是，我们使用有限元方法来计算电磁场耦合的温度和变形的金属管。我们的研究结果表明，高导电层可以增加低导电金属的可成形性。
The expansion of a metal tube by means of an electromagnetic forming (EMF) process is attractive because EMF has a high forming rate and can reduce residual stress. The forming forces in EMF are Lorentz forces. They are derived from a repulsive interaction between a transient electric current induced in a coil with the aid of a capacitor bank and an eddy current induced in a metal tube by means of a transient current. Highly conductive metals are suitable for EMF-based tube expansion but tubes of low conductive metals are often used for industrial purposes. We studied various methods of using EMF to increase the formability of low conductive metals. In particular, we used a finite element method to compute an electromagnetic field coupled with temperature and deformation of a metal tube. Our results show that a highly conductive layer can increase the formability of a low conductive metal.