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.
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