COMPUTER SIMULATION OF BLUNT PROJECTILE IMPACT ON EXPLOSIVE CHARGE

Four of the standard insensitive munition tests involve the impact of various projectiles on the tested munition. Experimental tests are often conducted to obtain data on the critical impact velocity of different geometries of projectiles made of different material against explosive charges, either bare or covered with various inert material plates. The current study involved computer simulation with the IMPETUS Afea Solver® finite element analysis (FEA) of the impact of a brass blunt brass projectile on a bare Composition B explosive charge as well as charges covered with 1 mm thick steel, 3 mm thick aluminum or 5 mm HPDE (High Density PolyEthylene). The results were compared with those from experimental tests and simulations from other scientists. Simulations results were within 5% of the experimental results.