防弹玻璃动态力学响应规律及抗弹性能研究

采用霍普金森压杆对防弹玻璃进行动态压缩实验，分析其破坏机理和防护机理，并通过靶试试验研究PVB夹层防弹玻璃的抗弹性能。结果表明：玻璃的压缩强度随应变率的增加而增大，但压缩失效应变随应变率的增大而减小；胶层可以有效提高玻璃的动态失效应变，使玻璃的吸能能力大幅提高；玻璃的动态强度随试样厚度的增加而提高，动态失效应变随试样的横截面积的增加而升高；玻璃在冲击载荷下出现大量裂纹并粉碎破坏，需要消耗大量能量作为表面能，从而能够有效消耗子弹的能量；PVB夹层防弹玻璃具有较强的防弹性能，且当迎弹层较厚时弹坑深度较浅。

Dynamic mechanical response and anti-bullet property of bulletproof glass

The dynamic mechanical properties of bulletproof glass were investigated using Hopkinson pressure bar. In addition, the failure mechanism and protective mechanism of glass were studied. Anti bullet property of bulletproof glass with PVB interlayer was investigated by ballistic experiment. Results show that the compressive strength increases with strain rate,while the failure strain decreases as the strain rate increases. The PVB glue results in the increase of failure strain and energy absorption of glass. The compressive strength increases with thickness and the failure strain increases as the basal area increases. Under impact,glass cracks and shatters into many fragments. The cracking of glass consumes a lot of energy of bullet as surface energy. Glass with PVB interlayer could prevent the penetration of projectile effectively. The crater depth of glass with PVB interlayer is shallower when the front layer is thicker.