点阵金属夹层结构抗侵彻实验研究

Experiment assessment of the ballistic response of a hybrid-cored sandwich structure

通过弹道冲击实验方法研究了两种点阵金属夹层防护结构的抗弹丸侵彻能力,结合失效破坏模式和吸能效率,综合分析了点阵金属夹层防护结构的抗侵彻机理。实验结果初步表明:球形弹丸侵彻过程中,由于点阵金属结构的塑性大变形和剪切扩孔、陶瓷棒和环氧树脂的断裂破坏以及面板的宏观弯曲变形,使得该型防护结构的抗弹能力得到了大幅度提高。同样侵彻速度条件下,Type Ⅱ型夹层防护结构的吸收能量较Type Ⅰ型夹层防护结构高,但它们的单位面密度吸收能量相差不大。研究结果可以为轻质复合装甲的防护设计提供参考。

The ballistic performance of a hybrid-cored sandwich structure was studied by using ballistic penetration test. Considering the failure modes and efficiency of absorbed energy,the anti-projectile mechanism of the hybrid-cored sandwich structure was synthetically analyzed. The experimental results indicate that anti-projectile capability is substantially enhanced in a high-amplitude extent. During the penetration of the spherical projectile,the kinetic energy of the projectile is absorbed mainly through the large plastic deformation and shearing expansion of the pyramidal lattice structure,the fracture failure of ceramics rods and hybrid epoxy,and the macroscopically bending deformation of the faces. The results can offer references for the protection design of lightweight composite armor.