层间间距对平纹双层结构靶体抗侵彻性能的影响

为满足软体防弹叠层增强减重的需求和优化柔性叠层防弹材料的结构设计,通过增加层间间距,改变靶体迎弹面和背弹面的动态响应,提升其抗侵彻性能。叠层的吸能性能通过弹丸侵彻实验进行表征,且通过有限元模型分析叠层结构的吸能机制。弹丸侵彻实验结果表明:靶体的吸能效果随层间间距变宽先下降后上升,当间距到达一个临界值后,吸收的能量将停止增长;有限元模型的仿真数据与实验数据的变化趋势相吻合,表明靶体迎弹面横向形变的宽度和应力分布的面积随间距的变宽而增大,背弹面应力分布的强度随间距的变宽而减弱。

Influence of layer spacing on ballistic performance of double-plied plain fabric target

In order to meet the requirements of performance improvement and weight reduction of flexible ballistic panels, and to optimize the structure design of flexible multi-ply ballistic materials, spacing was incorporated between the adjacent layers to study the dynamic response of the front and back layers. This research used ballistic penetration test to characterize the energy absorption capacity of fabric panels, and also made use of a finite element model to analyze the mechanisms of energy absorption. It was found from the ballistic tests that the energy absorption of the target decreases and then increases as the layer spacing widens. When a critical value is reached, the energy absorption stops increasing. The numerical predictions obtained from finite element modeling share similar trend with the experimental results. It was found that the transverse deflection and the stress distribution area of the front layer increase as the layer spacing becomes widened, whereas the magnitude of stress distribution decreases on the rear layer.