不同起爆方式下炸药驱动柱壳膨胀断裂的数值模拟  

Numerical studies of explosion induced cylindrical shell fracture under different detonating modes

作　　者：刘明涛[1,2] 汤铁钢[2] 胡海波[2] 李庆忠[2] 胡秀章[1] 李永池[1] 

机构地区：[1]中国科学技术大学近代力学系,安徽合肥230027 [2]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《爆炸与冲击》2014年第4期415-420,共6页Explosion and Shock Waves

基　　金：中国博士后科学基金项目(2011M501394);中国工程物理研究院科学技术发展基金项目(2012A0201011)

摘　　要：采用数值模拟方法,研究不同起爆方式下内部炸药对金属柱壳的加载历程差别。计算结果表明,不同起爆方式下柱壳内表所经受的压力载荷、做功历史显著不同,分析了引起差异的原因。提出一种半解耦数值方法,使柱壳网格划分得更细,可以模拟不同起爆方式下柱壳的膨胀破坏过程,通过理论分析说明了这种方法的合理性。The explosion induced fracture of metallic cylinder under different detonating modes was simulated.The results show that different detonating modes lead to significant differences on the pressure and apply work history of the cylindrical shell.A semi-decoupling numerical method was proposed to thin the mesh size of the metallic cylinder and to simulate the process of destruction of cylindrical shell under different detonating modes with higher degree of accuracy.Theoretical analysis shows that this method is reasonable.The shear bands appearing during the fracture of metallic cylindrical shell was reproduced using this semi-decoupling method.

关 键 词：固体力学 剪切带 起爆方式 柱壳破裂 

分 类 号：O346.1[理学—固体力学]