Peridynamic Simulation of Dynamic Responses of Laminated Glass under Explosion Loading

Abstract

In order to study the spontaneous dynamic fracture behavior of transparent laminated glass under explosion loading, peridynamics(PD) was introduced to simulate the dynamic responses of crack initiation, propagation, bifurcation, coalescence, and arrest. The 3D discontinuous Galerkin algorithm was used for glass parts, and the finite element algorithm was used for adhesive layer PVB part and frame part. The contact algorithm was used to realize the coupling of the two parts. Finally, the crack propagation law of laminated glass was studied systematically by greatly changing TNT equivalent, blast distance, the thickness of PVB adhesive layer, and the thickness of inner and outer glass. The simulation results show that: 1) Compared with the explosion experiment, PD can simulate the fracture failure behaviour and crack propagation of laminated glass greatly; 2) Under the same conditions, different explosion distance, explosive equivalent, and thickness of PVB adhesive layer have significant effects on the dynamic response of laminated glass structure; 3) By comparing the maximum deflections of outer glass under different charge levels, it is found that the PD method has a good agreement with the experimental method and the element deletion method, and the error range of PD method is lower than that of the element deletion method; 4) In PD method, the energy absorption rate of outer glass is much higher than that of inner glass and PVB layer, and the thickness distribution of inner and outer glass also has a great influence on energy absorption rate. The results of PD method and element deletion method are in good agreement.

Keywords

• peridynamics
• explosion loading
• laminated glass
• element deletion method
• crack propagation