NUMERICAL-SIMULATION OF FRACTURE OF PLATES BY CONFINED EXPLOSIVE CHARGES

A numerical simulation of the interaction between an HE charge confine d within a shell and an elastoplastic plate was performed. The cases o f a fixed charge and a charge with a convex bottom moving at a given v elocity were considered. The main features of plate deformation, and f racture and the difference of the obtained results from those for an u nconfined charge resting on a plate were revealed. It was shown that f or the moving charge an optimum (from the point of view of spallation in the plate) size of the contact spot exists at the moment of detonat ion-wave arrival at the interface between the plate and the charge.