Numerical Simulation of Ballistic Impact on Armour Plate with a Simple Plasticity Model

Defence Science Journal

B. N. Rao¹  Vijayabaskar Narayanamurthy²  C. Lakshmana Rao¹ 

[1] Indian Institute of Technology Madras, Chennai;Research Centre Imarat, Hyderabad

关键词: Numerical simulation;    ballistic impact;    projectile;    armour plate;    plasticity model;    experimental results;    failure;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

Ballistic impact of a steel projectile on armour steel plate is examined by numerical simulations using 3-D nonlinear dynamic explicit finite element code ANSYS LS-DYNA. Simulations are attempted using a simple strain rate dependent plasticity model that can capture large strain, strain rate hardening and fracture encountered at high velocity ballistic impacts. Initial simulations are carried out for a cylindrical bullet with a semi-spherical nose shape impacting a military vehicle door at two different velocities as a test problem. This is then extended to simulate a real problem of armour piercing shot impact on a thick armour steel plate at ordnance velocity regime. The former is compared with results reported in published literature while the latter is assessed with the experimental findings. The deformation pattern generated in the deformed armour plate, residual projectile velocity and displacement of the projectile are taken as the necessary parameters for evaluating the results of simulation. The study presented in this paper demonstrates the effectiveness of the adopted simple plasticity model to simulate a highly nonlinear phenomenon to reasonably predict the physically measurable impact parameters.Defence Science Journal, Vol. 64, No. 1, January 2014, DOI:10.14429/dsj.64.4521

【 授权许可】

Unknown