Influence of inert core stuffing's physical properties on the impact of detonation driving of scalar hollow charge

In the present work, to find out how the inert core's physical properties influence the detonation driving of the axial scalar hollow charge, we fabricated three warheads separately stuffed with air, nylon 1011 and aluminum 12, carried out a static explosion test using the pulse X-ray imaging testing technology, and obtained the average velocity of the fragment field and the characteristics of the velocity distribution. Also, using the LS-dyna software and the ALE algorithm, we carried out numerical simulation to analyze the influences of the physical properties of three kinds of inert core's stuffings on the fragment field's shape, shockwave pressure, and initial velocity. The results show that the detonation driving is related with the shock resistance and dynamic stiffness of the stuffing: if the shock resistance of the stuffing is greater than the main charge, the impact on the shock wave pressure is more obvious; the greater the initial pressure on the shell surface, the greater the power of the main charge to drive the fragment, and the faster the fragment's velocity; and the influence of the inert core's physical properties become greater as the inert core or cavity radius increases.