利用微射弹研究聚合物薄膜的弹道极限。
Using microprojectiles to study the ballistic limit of polymer thin films.
作者信息
Chen Shawn H, Souna Amanda J, Soles Christopher L, Stranick Stephan J, Chan Edwin P
机构信息
Materials Measurement Sciences Division, National Institute of Standards and Technology, 100 Bureau Dr, Gaithersburg, MD 20899, USA.
Materials Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Dr, Gaithersburg, MD 20899, USA.
出版信息
Soft Matter. 2020 Apr 29;16(16):3886-3890. doi: 10.1039/d0sm00295j.
The dynamic impact between a particle and a planar material is important in many high impact events, and there is a growing need to characterize the mechanical properties of light-weight polymeric materials at dynamic loading conditions. Here, a laser-induced projectile impact test (LIPIT) is employed to investigate the ballistic limit (V0) and materials properties at impact velocities ranging from 40 m s-1 to 70 m s-1. An analytical expression describing the various energy dissipation mechanisms is established to estimate the yield stress and elasticity for polycarbonate thin films. This measurement approach demonstrates the utility of using low sample mass for discovery of materials for impact mitigation, as well as high-throughput mechanical characterization at dynamic loading rates.
在许多高冲击事件中，粒子与平面材料之间的动态冲击都很重要，并且在动态加载条件下表征轻质聚合物材料的机械性能的需求日益增长。在此，采用激光诱导抛射体冲击试验（LIPIT）来研究40米/秒至70米/秒冲击速度范围内的弹道极限（V0）和材料性能。建立了一个描述各种能量耗散机制的解析表达式，以估计聚碳酸酯薄膜的屈服应力和弹性。这种测量方法证明了使用低样品质量来发现用于减轻冲击的材料以及在动态加载速率下进行高通量机械表征的实用性。
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