Strength effects in reverse cumulation

The effect of the material strength on the deformation behavior of a small conical casing loaded by the detonation of a cylindrical explosive charge is investigated using numerical modeling. A Maxwellian viscoelastic body model is used in conjunction with the method of moving grids which combines the advantages of the Eulerian and the Lagrangian approaches. The known algorithms are modified to generate grids in regions characterized by discontinuities (material damage) and in order to trace the displacements of the region boundaries. A difference scheme is used which represents an extension of Godunov's method to the particular case considered here. It is shown that the strength of a material has a noticeable effect on the deformation of small cumulative casings.