Simulation of the Impact Fracture Behavior of Double Laminated Glass Based on Intrinsic Cohesive Model

In order to investigate the crack propagation law of double layered laminated glass (LG) under impact load, a model for calculating the dynamic response of the both sides support LG under the impact of a spherical hammer head is established by using the zero-thickness intrinsic cohesive method. The maximum principal stress failure criterion is applied to the intrinsic cohesive element. The effects of penalty stiffness K and thickness of glass on crack formation path, range and number, as well as the displacement of lower panel were discussed. Simulation results show that: (1) under the impact load, a large number of fine cracks and glass particles are first generated in the center of LG upper glass plate, and then a large number of circumferential cracks are generated in the process of continuous outward propagation of radial cracks; (2) with the increase of the K value of the glass penalty stiffness, the crack growth range and the number of cracks decrease, and the center displacement of the lower glass plate decreases; (3) with the increase of glass thickness, the crack range and number decrease, and the center displacement of the lower glass plate decreases. The results provide a direct basis for LG shock resistant design and safety protection.