爆炸复合边界效应SPH方法的数值模拟（英文）  

Numerical Simulation on Boundary Effect in Explosive Cladding by Smoothed Particle Hydrodynamics

作　　者：缪广红 李亮 江向阳 刘文震 程扬帆[2] 汪泉[2] 余勇[3] 马宏昊[3] 沈兆武[3] 

机构地区：[1]安徽理工大学力学与光电物理学院,安徽淮南232001 [2]安徽理工大学化学工程学院,安徽淮南232001 [3]中国科学技术大学近代力学系,安徽合肥230027

出　　处：《含能材料》2017年第9期762-766,共5页Chinese Journal of Energetic Materials

基　　金：Natural Science Foundation of China(11502001,11602001);the Foundation for Ph D in Anhui University of Science and Technology(11146);the Key project of Natural Science Foundation of Anhui Province(KJ2017A089);Anhui Science&Technology Department(1608085QA15;1708085QA17;1708085QE123)

摘　　要：利用LS-DYNA软件采用无网格的光滑粒子流体动力学(SPH)方法对爆炸复合的边界效应进行了二维数值模拟研究。结果表明,金属射流现象和边界效应与爆炸复合生产实践一致。爆炸复合边界效应产生原因并非是由于边界的冲击能量过剩而造成基复板碰撞时边界处的打伤打裂,在基复板碰撞之前,断裂已经产生,认为爆炸复合边界效应的产生是由于稀疏波对边界处爆轰产物的影响,导致复板边界处与内部存在速度差,从而使复板边界处的碰撞角变大,在爆轰产物压力的作用下发生断裂。此外,采用蜂窝结构炸药及双面爆炸复合方法可以使得边界效应得到有效控制。Two dimensional numerical simulation of the boundary effect in explosive cladding was carried out by using the LS-DYNA software and gridless Smoothed Particle Hydrodynamics （SPH） method. Results show that the phenomena of metal jet and boundary effect were consistent with the production practice of explosive cladding. The reason of causing the boundary effect in explosive cladding is not caused by the damage and cracking at the boundary when colliding of the base composite plate due to the excess impact energy of the boundary, before the base composite plate collision, the fracture has been generated. Considering that The generation of boundary effect in explosive cladding is due to the effect of rare- faction wave on the detonation products at the boundary, leading to the velocity difference is existed at the boundary and internal of composite plate, so that the collision angle at the boundary of composite plate becomes bigger, the frature occurs under the action of detonation pressure. In addition, the boundary effect can be effectively controlled by using honeycomb structure explosive and double sided detonation composite method. The preven- tive measures are proposed to against such a phenomenon.

关 键 词：爆炸复合 边界效应 光滑粒子流体动力学(SPH)方法 数值模拟 

分 类 号：TG456.6[金属学及工艺—焊接]