摘要
考虑脆性材料在高速弹体的侵彻下会发生破碎这一特性,将靶体材料划分为弹性-裂纹-破碎三个响应区,利用静态空腔膨胀理论求出了空腔膨胀压力,即修正的流体动力学模型(A-T模型)中的靶体阻力Rt.分析了压剪系数对靶体阻力和靶体应力场的影响.利用A-T模型求出了钨杆弹以1.5～4.5 km/s的速度撞击靶体时的侵彻深度,并与实验结果及其他研究者的结果进行了比较.
Brittle materials can be pulverized near the tip of the penetrator under high-velocity impact. This paper considers the pulverization of brittle materials and divides the target into the pulverized, cracked and elastic regions,and derived the cavity expansion pressure,viz, target resistance R, of A-T model （modified hydrodynamic model） based on static cylindrical cavity expansion theory. The influences of the pressure-shear coefficient on Rt and stress fields are discussed. The depth of penetration is calculated using A-T model for a tungsten long rod impacting brittle target at 1.5～4.5 km/s. The calculated results of this model are compared with the experimental data and the results of other models.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2005年第3期257-263,共7页
Chinese Journal of High Pressure Physics
关键词
吮性材料
侵彻
柱形空腔膨胀理论
靶体阻力
brittle materials
penetration
cylindrical cavity expansion theory
target resistance
