爆炸与冲击2018，Vol.38Issue(2)：250-257,8.DOI:10.11883/bzycj-2017-0198
不同速度段弹体侵彻岩石靶体的理论分析
Theoretical analysis of projectiles penetrating into rock targets at different velocities
摘要
Abstract
As the impact velocity increases,the penetration mechanism varies from rigid penetration to semi-liquid penetration and fluid penetration,each of which follows a wholly different analytical model.In the semi-liquid penetration stage,the mass loss of the projectile body begins to increase obviously,leading to serious decrease of the penetration efficiency and the penetration depth at the increase of the impact velocity.The intrinsic analytical model of rigid penetration was deducted by analysis of the real deformation and stress states of different damage zones.Based on the proposed relationship between penetration and velocity,we established the equation of penetration depth in account of the projectile mass loss,proposed the hypothesis of fluid and rigid region of fluid penetration under hypervelocity impact and,by adopting the laws of conservation of momentum and Bernoulli equation,presented the formulas for penetration resistance,and deduced the corresponding equations of penetration depth using the relational expression of the projectile mass loss.By comparison of the result of calculation with experimental data of penetration into granite,we proved the reliability of the formulas for the three stages,showing them in good compatibility in penetration depth and mass loss of the projectile with each other,and verifying a full agreement between their variation and experimental results.关键词
撞击力学/侵彻/高速侵彻/岩石靶体/侵彻机制Key words
impact mechanics/penetration/high-velocity penetration/rock target/penetration mechanism分类
数理科学引用本文复制引用
宋春明,李干,王明洋,邱艳宇,程怡豪..不同速度段弹体侵彻岩石靶体的理论分析[J].爆炸与冲击,2018,38(2):250-257,8.基金项目
国家自然科学基金项目(51478466,51409258,11772355) （51478466,51409258,11772355）
