铝—铝爆炸焊接界面波形成与特征  

Formation and characterization of Al-Al explosive welding interfaces

作　　者：李芮宇 孙宇新[1] 付艳恕[2] 孙其然[1] 赵亚运 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094 [2]南昌大学机电工程学院,南昌330031

出　　处：《焊接学报》2017年第5期92-95,107,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(11202093)

摘　　要：文中通过试验观察与数值模拟相结合,尝试分析界面波的形成与结构特征.对2024铝开展系列准对称爆炸焊接,获得了界面波结构特征随装药比变化样品,并基于Autodyn软件中的光滑粒子法对铝-铝爆炸焊接斜碰撞过程进行了模拟,获得与试验现象吻合良好的计算结果.结果表明,装药比的提高使得再入射流厚度和界面波长波幅增加,且界面更加连续;装药比的提高对再入射流速度的影响不大;再入射流量的逐渐增多使得基板承受的剪切应力增大,进而导致界面出现平直到波状的渐变.分析得到的铝-铝爆炸焊接界面波特征随装药比的变化规律以及所使用的数值方法为相关分析提供了有用的参考.In this paper,a series of Al-Al quasi-symmetric explosive welding experiments were carried out and then the samples with variation charge ratio were obtained. Furthermore,the processes of Al-Al oblique collision were simulated based on smooth particle hydrodynamic method( SPH) in Autodyn,and it was found that the simulation results were in agreement with the experiments. It is can be conclude that,first the wave length and amplitude increased with progressive increasing of charge ratio,as well as the thickness of re-entrant jet. In addition,the interfaces became more continuous. Second,the influence of charge ratio on re-entrant jet velocity was rare. Third,the shear stress of base plate enhanced with the increase of re-entrant jet,which leads to the interface gradual changing from straightness to wave.The variation laws of Al-Al explosive welding interfaces with charge ratio and the numerical method used in this paper will be beneficial for correlation research.

关 键 词：爆炸焊接 装药比 光滑粒子法 界面波 剪切变形 

分 类 号：TG456.6[金属学及工艺—焊接]