小口径弹丸侵彻双箭头负泊松比蜂窝夹芯结构的弹道特性
收稿日期: 2023-07-03
修回日期: 2023-08-06
录用日期: 2023-08-12
网络出版日期: 2023-09-12
基金资助
国家自然科学基金(11902160);江苏省研究生科研与实践创新计划项目(KYCX23_0509)
Ballistic Penetration of Small-Caliber Bullet in Double-Arrow Honeycomb Core Structures with Negative Poisson’s Ratio
Received date: 2023-07-03
Revised date: 2023-08-06
Accepted date: 2023-08-12
Online published: 2023-09-12
通过有限元仿真的方法研究双箭头负泊松比蜂窝夹芯结构的抗侵彻性能,利用小口径弹丸侵彻9种双箭头负泊松比蜂窝夹芯结构,获得双箭头负泊松比蜂窝夹芯结构的弹道特性.通过仿真得到弹丸侵彻过程中姿态变化,建立弹丸侵彻双箭头胞元的动力学仿真模型.仿真模拟表明:当上下面层厚度不变,仅增大芯层双箭头夹角,蜂窝夹芯结构的弹道极限随之降低.对于相同蜂窝夹芯结构,子弹初始速度与结构动能吸收率存在非线性关系,存在某一速度区间使得蜂窝夹芯结构抗侵彻性能最佳.侵彻过程中弹丸周向存在应力分布不均现象,产生非对称作用使弹丸受力环境变化,导致弹丸姿态角改变,最终引起弹丸的侵彻弹道失稳.
刘洋佐 , 徐诚 , 马吴宁 , 任杰 , 张震东 . 小口径弹丸侵彻双箭头负泊松比蜂窝夹芯结构的弹道特性[J]. 上海交通大学学报, 2025 , 59(1) : 139 -150 . DOI: 10.16183/j.cnki.jsjtu.2023.293
The anti-penetration performance of a double-arrow honeycomb sandwich structure with negative Poisson’s ratio (NPR) is investigated by using finite element simulation. With the penetration of small-caliber projectiles to nine types of arrowhead NPR honeycomb sandwich structures, the ballistic characteristics are obtained. The change in attitude during projectile penetration is obtained through simulation, and the dynamics simulation model of the projectile penetration double-arrow cell element is established. The simulation results show that when the thickness of the upper and lower layers are kept constant and only the double-arrow angle of the core layer is increased, the ballistic limit of the honeycomb sandwich structure is subsequently reduced. For the same honeycomb sandwich structure, there is a nonlinear relationship between the initial velocity of the bullet and the structural kinetic energy absorption rate. In addition, there is a specific velocity range within which the honeycomb sandwich structure exhibits optimal anti-penetration performance. During the penetration process, the projectile experiences an uneven distribution in the circumferential divection, which generates an asymmetric effect, altering the force environment, and leads to an unstable trajectory in the projectile’s penetration.
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