高速长杆弹侵彻半无限混凝土靶的理论分析

High Velocity Long Rod Projectile's Penetration into Semi-Infinite Concrete Targets

为了从理论上确定混凝土材料的靶板阻力,采用三段式线性状态方程和考虑拉伸破坏与剪切饱和的Mo-hr-Coulomb屈服准则描述混凝土材料,将半无限混凝土靶在高速冲击下的响应分为弹性区、开裂区、孔隙压实区和密实区,建立了混凝土材料的准静态空腔膨胀理论,确定了靶板阻力,运用A-T模型进行了长杆弹高速侵彻半无限混凝土靶的理论分析.算例结果表明,侵彻深度的理论分析结果与实验结果具有较好的一致性.

. To determine the target resistance of concrete materials, the constitutive description of concrete materials idealizes the pressure -volumetric strain as tri-linear equations of state, and the shear strength-pressure as Mohr-Coulomb with tension cutoff and shear saturation. The response of semi-infinite concrete target under high velocity impact is divided into four zones of elastic, cracked, compacted and condensed. The quasi-static spherical expansion theory is developed, target resistance in A-T model is determined, and the penetration depth of semi-infinite concrete targets penetrated by high velocity long rod projectiles is analyzed. The analytic result of penetration depth is in good agreement with experiment data.