摘要
为研究攻角对不同厚度芳纶层合板抗平头弹侵彻性能的影响,构建了三维有限元计算模型,首先通过对比实验结果验证了其可靠性,然后基于该数值模型,进一步计算了0°~30°攻角范围内,4、8和16 mm靶板的弹道响应,从子弹剩余速度、靶板能量吸收率、极限弹道速度与穿孔能量阈值4个方面,综合评估了芳纶层合板的抗侵彻性能。结果表明:攻角的影响与靶板厚度及子弹入射速度有关,随着攻角的增大,靶板的极限速度和穿孔能量阈值均有所降低,降低的程度随厚度的增加而减小;入射速度接近芳纶层合板弹道极限速度时,子弹剩余速度随着攻角增大而增大,但速度远高于弹道极限速度时,子弹剩余速度随着攻角增大而减小;攻角对芳纶层合板弹道性能的影响机理随靶板的破坏模式不同而改变。
A three-dimensional finite element(FE)model was developed to quantify the effect of attack angle on the penetration resistance of aramid laminates having varying thickness against flat-nosed projectile.The model was created through a macroscopic approach,which did not take into account the internal microscopic structure of the laminate and macroscopically equated each laminate as a homogeneous orthotropic anisotropic material.The validity of FE simulation results was compared with existing experimental data,with good agreement achieved in terms of residual velocities of the project and damage patterns of the aramid laminates.The validated FE model was subsequently employed to simulate the ballistic responses of 4,8 and 16 mm target plates in the range of 0°~30°attack angle.The residual velocity of the projectile,energy absorption rate of target,ballistic limit,and perforation energy threshold were calculated to characterize the ballistic performance of aramid laminates.By comparing the damage patterns of the aramid laminates and the contact forces applied to the project under different conditions,the mechanical mechanism by which the attack angle affected the ballistic performance of the aramid laminates at different impact velocities and different target thicknesses was explained.Within the studied working conditions,obtained results revealed that:the attack angle affects significantly the ballistic performance of aramid laminates,depending upon projectile impact velocity and target thickness;the ballistic limit and perforation energy threshold decrease with increasing attack angle,and the degree of such decrease is reduced as target thickness is increased;the residual velocity of projectile increases with increasing attack angle when the impact velocity is close to the ballistic limit and decreases with increasing attack angle when the velocity is well above the ballistic limit;the influencing mechanism of attack angle on ballistic performance varies with the damage pattern of aramid laminates.
作者
季海波
王昕
赵振宇
赵中南
李雪
韩佳彤
卢天健
JI Haibo;WANG Xin;ZHAO Zhenyu;ZHAO Zhongnan;LI Xue;HAN Jiatong;LU Tianjian(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China;MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China;Impact Mechanics Laboratory,National University of Singapore,Singapore 117575,Singapore;Northwest Institute of Nuclear Technology,Xi’an 710024,Shaanxi,China)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2023年第6期132-149,共18页
Explosion and Shock Waves
基金
国家自然科学基金(11972185)。
关键词
攻角
芳纶层合板
平头弹
弹道极限速度
穿孔能量阈值
attack angle
aramid laminate
flat-nosed projectile
ballistic limit velocity
perforation energy threshold
