铝-钢同轴管水封爆炸胀接撞击压力的研究  

Impact Pressure of Al / Steel Clad Pipe by Interior Explosive Expansion under Water

作　　者：余勇[1] 马宏昊[1] 赵凯[1,2] 缪广红[1] 范志强[1] 沈兆武[1] 李战军[3] 

机构地区：[1]中国科学技术大学近代力学系,安徽合肥230027 [2]北京理工大学爆炸重点实验室,北京100081 [3]广东宏大爆破股份有限公司,广东广州510623

出　　处：《含能材料》2016年第4期398-402,共5页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金面上项目(51374189;51174183);爆炸科学与技术国家重点实验室(北京理工大学)开放课题(KFJJ13-9M)

摘　　要：为了研究水封爆炸胀接管爆轰结束端开裂现象并探究其界面结合形式,首次使用一种可靠的聚偏氟乙烯(PVDF)压电薄膜传感器对铝-钢同轴管水封爆炸胀接撞击压力进行测试,得到并比较了压力时程曲线。结果表明,沿金属导爆索爆轰波的传递方向,基管与覆管的碰撞压力峰值呈递增趋势,表明引起末端开裂现象的直接原因是压力的增加。计算得到撞击压力峰值的平均值为532.9 MPa。根据爆炸复合中撞击速度与撞击压力之间的关系,在已知撞击压力的情况下得到碰撞速度为52.57 m·s^(-1)。经分析可知,界面碰撞产生的温度并不足以使界面发生熔化。界面的金相照片亦显示其结合方式主要为金属间的直接结合,未出现过渡层和熔化现象,表明采用PVDF压电薄膜传感器测量水封爆炸胀接的撞击压力、利用所得数据来推断界面结合形式可行。To study the cracking phenomenon at the end of AI/steel clad pipe by interior explosive expansion under water and in- terface bonding form, a reliable polyvinyliene fluoride（PVDF） piezoelectric film sensor was first, used for testing the impact pressure of AI/Steel coaxial pipe by interior explosive expansion under water, and the pressure history curves were obtained and compared. Results show that the impact pressure peak of base pipe and flyer pipe along the detonation wave transmission direction of metal det- onating cord reveals an increasing trend, indicating that the direct cause of the cracking phenomenon at the end is an increase in pressure. The calculated mean of peak pressure is 532.9 MPa. According to the relationship between the impact velocity and the im- pact pressure of explosive cladding, the impact velocity obtained in the case of the known impact pressure is 52.57 m ·s-1. From the explosive welding interface bonding mechanism and the metallography knowledge, the impact temperature produced by the in- terface impact is not high enough to make the interface melt. The metallographic photos of interface reveals that its way of combi- nation is direct bonding between metal without the transition layer and melting phenomenon, showing that measuring the impact pressure of interior explosive expansion under water by PVDF piezoelectric film sensor and inferring the interface bonding form by the obtained data are feasible.

关 键 词：水封爆炸胀接 碰撞压力 碰撞速度 界面结合性质 

分 类 号：TG392[金属学及工艺—金属压力加工]