Numerical study on the resistance of rigid projectiles penetrating into semi-infinite concrete targets  

作　　者：Huawei Yang Jie Zhang Zhiyong Wang Zhihua Wang Q.M.Li 

机构地区：[1]College of Management Science and Engineering,Shanxi University of Finance and Economics,Taiyuan 030006,China [2]Institute of Applied Mechanics,College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China [3]Shanxi Key Laboratory of Material Strength and Structural Impact,Taiyuan University of Technology,Taiyuan 030024,China [4]Department of Mechanical,Aerospace and Civil Engineering,School of Engineering,The University of Manchester,Manchester M139PL,UK

出　　处：《Acta Mechanica Sinica》2021年第3期482-493,I0003,共13页力学学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant 11390362);the Young Foundation of Shanxi University of Finance and Economics(Grant Z06134).

摘　　要：A study on the resistance of rigid projectiles penetrating into semi-infinite concrete targets is performed in this paper.Experimental data are analyzed to examine the penetration resistance during various stages of the penetration process.A numerical tool using AUTODYN hydrocode is applied in the study.The numerical results on both deceleration-time history and depth of penetration of projectiles are in good agreement with experimental data,which demonstrate the feasibility of the numerical model in these conditions.Based on the numerical model with a two-staged pre-drilled hole,the rigid projectile penetration in tunneling stage is studied for concrete targets with different strengths in a wide range of impact velocities.The results show that the penetration in tunnel stage can be divided into two different cases in terms of initial impact velocity.In the first case,when the impact velocity is approximately less than 600 m/s,the deceleration depends on initial impact velocity.In the second case,when the impact velocity is greater than 600 m/s,the effect of target inertia becomes apparent,which agrees with commonly used concrete penetration resistance equations based on cavity expansion model.

关 键 词：Rigid projectile Penetration resistance Entrance phase Inertial term Concrete target 

分 类 号：TU528[建筑科学—建筑技术科学]