Numerical Simulation on the Spallation of a Steel Cylindrical Shell Imploded under Slipping Detonation

The spallation experiment of a steel cylindrical shell imploded under slipping detonation was reported by Иванов et al., but the measured and calculated results, showed in that paper, are not in accord very well in values. In this paper, we utilized the method of damage-level function to carry out the numerical studies for the above experiment. The calculated spall locations are quite in accord with that of the Ивановs experiment. It is illustrated that the method of damage-level function we adopted has a certain universal applicability for studying the dynamic fracture problems. The implosion processes of the steel cylindrical shell used in the Ивановs experiments were also analyzed numerically in this paper. The influences of the critical damage-level c values adopted on the spall locations, the implosion trajectories, and the shell velocity histories were discussed, and the importance of reasonable selection of c value for analyzing the interface-instability problems was also illustrated.