Abstract Laminated glass is normally a three-layer sandwiched composite structure, i.e. two glass layers and one PVB interlayer. The discrete element/finite element (DE/FE) coupling approach, which uses DEs and FEs to respectively discretize the glass and PVB layers, has proved to be an effective method for impact failure analysis of laminated glass. However, only one failure pattern, glass cracking, was considered in previous literature. This work develops a cohesive zone based DE/FE approach to account for another impact failure pattern, interfacial debonding, existing in laminated glass. In the presented approach, DE/FE cohesive pairs are constructed by recourse to a contact searching algorithm, and cohesive forces are evaluated in a pointwise manner with the aid of a mixed mode traction-separation law. In addition, the novel approach is coupled with a particle-to-segment contact algorithm to achieve a smooth transition from cohesive failure to frictionless contact sliding. The effectiveness of the DE/FE approach is validated via three benchmark tests. Finally, the impact failure process of a laminated glass beam is simulated to demonstrate the capacity of the proposed approach in debonding analysis of laminated glass.

中文翻译：

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基于内聚区的 DE/FE 耦合方法用于夹层玻璃界面脱粘分析

摘要 夹层玻璃通常是三层夹层复合结构，即两层玻璃和一层PVB夹层。离散元/有限元 (DE/FE) 耦合方法使用 DEs 和 FEs 分别离散玻璃和 PVB 层，已被证明是一种有效的夹层玻璃冲击失效分析方法。然而，在以前的文献中只考虑了一种失效模式，即玻璃开裂。这项工作开发了一种基于内聚区的 DE/FE 方法，以解释夹层玻璃中存在的另一种冲击破坏模式，即界面脱粘。在所提出的方法中，DE/FE 内聚对是通过求助于接触搜索算法来构建的，并且在混合模式牵引分离定律的帮助下，以逐点方式评估内聚力。此外，这种新颖的方法与粒子到段的接触算法相结合，以实现从内聚破坏到无摩擦接触滑动的平滑过渡。DE/FE 方法的有效性通过三个基准测试得到验证。最后，对夹层玻璃梁的冲击破坏过程进行了模拟，以证明所提出的方法在夹层玻璃脱粘分析中的能力。