爆炸焊接法制备铟/铁复合板的实验与数值模拟

Experiment and Numerical Simulation of Indium/Iron Composite Plate Prepared by Explosive Welding

摘要:

提出了一种通过在炸药与复合板之间增加一层速度调整板，以获得理想焊接条件的用于制备铟/铁复合板的新型爆炸焊接方法。通过理论方法计算了爆炸焊接参数，通过实验对炸药载荷的影响进行了研究。应用光滑粒子流体动力学（SPH）方法进行数值模拟以验证参数有效性，探究了结合界面的成型机理，并研究了压力和塑性应变的分布。结果表明，当炸药厚度增加时，界面波形结构更明显。界面剪切试验结果表明铟/铁复合板结合面抗剪切强度为16 MPa，比纯铟材料的抗剪切强度高，且三点弯曲试验之后复合板结合界面无裂纹。采用改进的爆炸焊接方法可以有效制备高质量铟/铁复合板。

Abstract:

A novel explosive welding method was proposed to prepare the indium/iron composite plate by inserting a velocity-control plate between the explosive and composite plate to achieve the ideal welding condition. The experiments were conducted to investigate the effects of explosive load, and the parameters of explosive welding were calculated by the theoretic method. Numerical simulation of the smoothed particle hydrodynamics (SPH) method was used to verify the parameters and to investigate the formation mechanism of the bonding interface. The distributions of pressure and plastic strain were also studied. Results show that the wave structures become more obvious when the explosive thickness increases. The shear test results indicate that the shear strength of indium/iron composite plate is 16 MPa, which is higher than that of the indium material. After the three-point bending test, no cracks can be observed at the bonding interface. The modified explosive welding method can effectively prepare the high quality indium/iron composite plate.