镁合金管电磁脉冲成形的磁场模拟与实验

Electromagnetic field simulation and experiment on electromagnetic pulsed forming of magnesium alloy tubes

针对AZ31镁合金管进行了三种输入电压的电磁脉冲成形磁场模拟，获得了相应电压下电磁场和力场的分布。同时，进行了三种电压下的电磁脉冲成形实验，实验结果与模拟结果相符。通过对模拟结果和实验结果的分析表明：轴向拉应力σz和沿轴向不均匀分布的径向应力σr是管件出现斜裂纹的原因；沿圆周不均匀分布的径向应力σr和周向应力σθ是管件出现纵裂纹的原因。

The electromagnetic pulsed fomting of the AZ31 magnesium alloy tube using three kinds of input voltages was simu- lated, and the distributions of the electromagnetic field and force field corresponding to each voltage were obtained. At the same time, the electromagnetic pulsed forming experiments using the three kinds of input voltages were conducted. The simulated result was consistent with the experimental result. The analytical results of the simulations and experiments show that the oblique crack of the tube is due to the pulling stress in axial direction （σz） and the radial stress （σr） with the non-uniform distribution in axial direction, and the longitudinal crack is due to the σr with the circumferential non-uniform distribution and the circumferential stress （σθ）.