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Experimental investigation on damage and wave propagation of PVB laminated glazing structures under impact loading
Structures ( IF 4.1 ) Pub Date : 2020-12-16 , DOI: 10.1016/j.istruc.2020.12.003
Amr A. Nassr , Tomomi Yagi , Takashi Maruyama , Gen Hayashi

Experimental investigation on the damage and wave propagation characteristics in PVB laminated glass panels subjected to impact loading was conducted. By applying different impact energies, the effect of two projectile configurations, a wooden post and steel ball, was studied. The effect of impact location was also investigated. The dynamic response of the panels was measured at different locations on the test panels using strain gauges. Damage and transient response and wave propagation characteristics of test panels were reported and compared. The results showed that flexural wave was the predominant wave in the response. In addition, in-plane compressive wave was also observed. It was also shown that while the projectile contact area affected the maximum transient response and crack propagation characteristics, it had a limited effect on the perforation threshold. For panels impacted at the corners, coupled strain waves were created by wave reflection processes when the waves reached the panel boundaries. Moreover, the impact velocity had a pronounced effect on peak strain and strain rates of test panels.



中文翻译:

冲击载荷下PVB夹层玻璃结构的损伤和波传播的实验研究

对冲击载荷作用下的PVB夹层玻璃面板的损伤和波传播特性进行了实验研究。通过施加不同的冲击能量,研究了两种弹丸配置(木柱和钢球)的效果。还研究了冲击位置的影响。使用应变仪在测试面板的不同位置测量面板的动态响应。报告并比较了测试板的损伤,瞬态响应和波传播特性。结果表明,弯曲波是反应的主要波。另外,还观察到面内压缩波。研究还表明,尽管弹丸接触面积影响了最大瞬态响应和裂纹扩展特性,它对穿孔阈值的影响有限。对于撞击在角落的面板,当波到达面板边界时,通过波反射过程会产生耦合应变波。而且,冲击速度对测试板的峰值应变和应变速率具有显着影响。

更新日期:2020-12-16
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