轴向预压缩双晶片动力学模型与特性分析

基于夹层结构是非常理想的抗爆炸冲击、弹道侵彻的轻质结构材料，制备了双层K-cor夹层结构试样。首先，采用一级轻气炮系统实验研究了双层K-cor夹层结构的高速冲击响应；其次，建立了双层K-cor夹层结构的有限元模型模拟了高速冲击过程，并利用该模型分析了高速冲击过程中的能量吸收和破坏模式；最后，讨论了结构的变化对于高速冲击性能的影响。结果表明：双层K-cor夹层结构相比单层结构的弹道极限速度提升了8.3%，模拟结果与实验值吻合较好；双层结构的优势在于更多界面在冲击作用下导致的吸能机制增加；提高Z-pin植入密度能够切实有效地提升K-cor的高速冲击性能。

Dynamic Model and Characteristic Analysis of Pre-compressed Piezoelectric Bimorph

Sandwich structure is an ideal lightweight structural material to resist explosion impact and ballistic penetration. First, the high-velocity impact response of double-layer K-cor sandwich structure is studied based on the first-stage light gas gun experiment. Then, the high-speed impact is simulated with the finite element model of double-layer K-cor sandwich structure. Besides, the energy absorption and failure modes during the impact are analyzed. Finally, the impact of changing structure on the high-velocity impact performance is discussed. The results show that the double-layer K-cor sandwich structure increases the ballistic limit speed by 8.3% compared to the sIngle-layer structure. The simulation results is agrees with the experimental values. The double-layer structure provides more interfaces for the system to increase energy absorption mechanism during the impact process. The increase of Z-pin implant density significantlyenhances the high-velocity impact performance of the K-cor structure.