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为研究夹层玻璃在爆炸作用下的动力响应特征,对四边简支夹层玻璃面板进行了爆炸作用试验研究。试验按3个爆炸等级进行,研究了夹层玻璃面板在不同爆炸当量下的动力响应特征和破坏形态。试验表明:爆炸作用后冲击波的超压迅速升至峰值,并在数十毫秒内逐渐衰减,夹层玻璃的位移和应力随爆炸等级的增加而增大;在爆炸作用下,玻璃面板开始碎裂时裂纹在中心处呈环状,并由中心向四周均匀扩散,整个裂纹呈放射状展开,随着爆炸等级的增加,最终呈撕裂状破坏,钢化玻璃破碎为颗粒附着在PVB胶层上,没有发生飞溅。同时运用LS-DYNA有限元分析软件对试验模型进行了数值分析,分析所得玻璃面板的中心点最大位移与试验结果差别为38.7%,最大应力与试验结果的差别为20%,所得破坏模式与试验结果相吻合,表明数值模拟方法可靠。
In order to study the dynamic response of the laminated glass under the action of explosion, the explosion experiment of the simply supported laminated glass panels was carried out. The test was carried out at three levels of explosion, and the dynamic response characteristics and failure modes of laminated glass panels under different explosion equivalent weights were studied. The experimental results show that the overpressure of the shock wave rapidly increases to its peak value after explosion, and gradually decreases within tens of milliseconds. The displacement and stress of the laminated glass increase with the increase of the explosion level. When the glass panel begins to fragment under the action of explosion Cracks in the center of the ring, and spread evenly from the center to the periphery, the entire crack radial expansion, with the explosion level increases, the final was tearing rupture, broken glass as glass particles attached to the PVB adhesive layer, did not happen Splash At the same time, LS-DYNA finite element analysis software was used to analyze the experimental model. The maximum displacement of the center point of the obtained glass panel was 38.7% and the difference between the maximum stress and the experimental result was 20%. The resulting failure mode and experiment The results are in agreement, indicating that the numerical simulation method is reliable.