液体炸药滑移内爆加载下钢管的变形与层裂破坏研究  

Deformation and spallation of cylindrical steel tube loaded by sliding implosion of liquid explosive

作　　者：李雪梅[1] 金孝刚[2] 李大红[2] 胡时胜[1] 

机构地区：[1]中国科学技术大学力学与机械工程系,安徽合肥230026 [2]中国工程物理研究院流体物研究所冲击波物理与爆轰波物理实验室,四川绵阳621900

出　　处：《爆炸与冲击》2003年第6期523-528,共6页Explosion and Shock Waves

基　　金：中物院重大基金项目(2000Z0307)

摘　　要：用液体炸药滑移内爆加载方式,研究了不同炸药厚度和外壳条件下20钢圆管的内聚变形和破坏特征。实验中,钢管发生了较大径向应变,应变值大致随炸药厚度的增加而线性增大。在炸药厚度不低于3mm时钢管变形均匀,轴对称较好;药厚小于3mm时其变形不再是基本轴对称收缩,管子表面出现扭转褶皱。各种装药厚度下,均未观察到预期的层裂破坏。对未层裂的原因进行了初步分析。By using methods of sliding implosion, the converging deformation and fracture characteristics of the cylindrical steel tube were researched, which was loaded by liquid explosive nitromethane (CH3NO2) with different thickness and under different outer-shell conditions. The results show that the large deformation of the steel tube increases linearly with the explosive's thickness approximately. Even and symmetrical deformations are observed when explosive thickness are 5 mm, 4 mm and 3 mm. The deformations are torsional instead of symmetrical when explosive thickness is less than 3 mm. Expected spallation hasn't been observed in all these experiments. Analysis has been done for the reason of no spallation.

关 键 词：液体炸药 滑移内爆加载方式 内聚变形 钢管 层裂破坏 固体力学 固体力学 

分 类 号：O347.4[理学—固体力学]