Critical assessment of the post-breakage performance of blast loaded laminated glazing: Experiments and simulations
Critical assessment of the post-breakage performance of blast loaded laminated glazing: Experiments and simulations
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DOI：
10.1016/j.ijimpeng.2015.09.008
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发表时间：
2016-02
影响因子：
5.1
通讯作者：
Joren Pelfrene;J. Kuntsche;S. Dam;W. Paepegem;J. Schneider
中科院分区：
文献类型：
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作者：
Joren Pelfrene;J. Kuntsche;S. Dam;W. Paepegem;J. Schneider
当受到空气冲击波的冲击时，玻璃窗是最脆弱的建筑部件。出于安全要求，窗户玻璃通常选择夹层玻璃，其中两层或更多的玻璃层与聚合物中间层粘合在一起，以防止玻璃碎片破碎。通过选择合适的夹层材料，即使窗户破裂，也能保持对冲击波的屏蔽作用。数值模拟夹层玻璃板破碎后的响应可以为优化夹层材料和玻璃板结构提供有价值的工具。本文介绍了根据标准化程序对层压玻璃进行爆炸试验的结果，以及随后的数值模拟。实验结果表明，采用粘接性能较低的软质聚乙烯醇-丁醛（PVB）夹层玻璃在高载荷下的安全性能最佳，且夹层无撕裂，同时仍能有效地保留玻璃碎片。这些实验的数值模拟试图捕捉夹层玻璃在爆炸荷载下的断裂和破碎后的行为。在有限元模型中，玻璃单元在达到断裂准则时被删除。该模型可以全面再现裂纹形成和断裂后的变形，但缺乏对最终破坏的预测，这主要是因为玻璃和层间部件对元件尺寸的依赖性很强。
Glass windows are the most vulnerable building components when impacted by an air blast wave. For safety requirements, the customary choice for the window glazing is laminated glass, where two or more glass plies are bonded with a polymer interlayer to retain glass fragments upon breakage. With proper choice of interlayer material, the window can keep functioning as a shield to the blast wave even when fractured. Numerical simulation of the post-breakage response of a laminated glass panel can be a valuable tool for optimisation of the interlayer material and the glass panel configuration.This article presents the results of a blast testing campaign for laminated glazing, according to a standardised procedure, and subsequent numerical simulation thereof. The experiments show that laminated glass using a soft polyvinyl-butyral (PVB) interlayer with low adhesion properties achieves the best safety performance at higher loads with no interlayer tearing, while still efficiently retaining glass fragments. The numerical simulation of these experiments attempts to capture the fracture and post-breakage behaviour of laminated glass under the blast load. In the finite element model, glass elements are deleted upon reaching a fracture criterion. The model can globally reproduce crack formation and post-fracture deformation, but lacks prediction of ultimate failure, mainly because of a strong dependency on the element size for both glass and interlayer parts.