Containing The Fragments Of Shell Explosives Ignition Mechanism And Projectile Strength Study

As composite structure fragment, reactive fragment increases target destruction by activating the incendiary or the explosive element it contains, when impacting and penetrating the target at high speed. In this thesis, after theoretical analysis and the experimental verification for the mechanisms of the ignition of the charge covercd with a metal plate on impact, a scheme of an igniting reactive fragment is designed. Both the theoretical calculation and the experiment results demonstrate that the fragment structure and reactive materials adopted in this thesis can effectively impact and ignite the charge covercd with a metal plate, and comparing to ordinary fragment, kill ratio can be a great increase, so the fragment design and the reactive material formulation are practical and promising.The process of fragment scattering of a warhead is highly complex, and a precise theoretical analysis is difficult. Based on the research and analysis of the structure and working mechanisms of a fragment warhead, the 3-D finite element model of a fragment warhead with typical structure is established. Using finite element analysis software LS-DYNA, the detonation of the main charge, the wave propagation, the way of buffer liner, and the initial driving process of the fragments are simulated. Through numerical simulation for factors like main charge material, quantity of the main charge, detonation approaches, buffer lining material, quantity of buffer liner, cover material, their effects on the speed and pressure of the fragments are established, which provide guide lines for the design of reactive fragment warhead.