高速钨杆弹对脆性靶体的侵彻分析  

Analysis of High-Velocity Tungsten Rod on Penetrating Brittle Target

作　　者：王延斌[1] 李九红[2] 魏雪英[3] 俞茂宏[1] 

机构地区：[1]西安交通大学建筑与力学学院 [2]西安理工大学土木工程系,陕西西安710048 [3]长安大学建筑工程学院,陕西西安710054

出　　处：《高压物理学报》2005年第3期257-263,共7页Chinese Journal of High Pressure Physics

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.

关 键 词：吮性材料 侵彻 柱形空腔膨胀理论 靶体阻力 

分 类 号：O385[理学—流体力学]