关键词: 夹层玻璃, 冲击破坏, 内聚力模型, 有限元, 离散元

Abstract:

In order to simulate the impact fracture process of laminated glass beam,a fracture model suitable for 3Dspherical discrete elements is proposed based on the basic concept of the cohesive model commonly used in the finiteelement method ( FEM) .In this model,the interactions between two discrete elements are divided into threetypes,namely the connection,the cohesion and the contact.When the fraction meets the criterion,the interactionbetween the corresponding discrete elements changes from the connection to the cohesion,and the cohesive tractionis obtained from the opening displacement of the corresponding elements.The constructed model is then implementedin a self-developed discrete element /finite element coupling program CDFP,and the impact fracture process ofthe laminated glass beam is finally simulated.The results show that the simulated fracture mode accords well withthe experimental one,which means that the proposed fracture model and the adopted simulation method are botheffective.

Key words: laminated glass, impact fracture, cohesive model, finite element, discrete element