Peridynamics simulation of the fragmentation of ice cover by blast loads of an underwater explosion

A bond-based peridynamic approach was applied to investigate the fragmentation of ice cover by blast loads of an underwater explosion. A modified elastic micromodulus was proposed in peridynamics, which can describe the long-range force varying with distance between two particles. The elastic-brittle constitutive model was implemented in numerical model considering different compressive and tensile strength of ice. A blast loading generated by underwater explosion was analyzed, in which the effects of fluid-solid coupling and liquid jets were taken into account. In addition, the failure criterion is defined based on fracture toughness. The simulation results show a good agreement with the experimental data. Furthermore, the parameters that influence the fracture radius of the ice cover were also discussed.