Research on Detonation Growth Characteristics of the Cast CL-20

Abstract

In order to study the detonation growth characteristics of the cast CL-20, shock initiation experiments were carried out. The ∅50mm samples content of 84wt% CL-20, 5wt% mental fuel and 11wt% HTPB binder were prepared. The one-dimension Lagrangian gauge measuring method was used to obtain the pressure histories of the cast CL-20. The results showed that when the loading pressure decreased, the growth of the leading shock wave speed and the front pressure of the explosive slowed down and the time to form a stable detonation was longer. The binder elastomer network effectively reduced the shock wave sensitivity of the cast CL-20 and the critical initiation pressure is 1.40GPa∼2.17GPa. A two-dimension axisymmetric shock initiation numerical model was established. The adaptive genetic algorithm compiled by MatLab was used to call the nonlinear finite element fluid dynamics software (LS-DYNA) to calculate the reaction rate equation parameters of the ignition growth model of the cast CL-20 combined with the results of shock initiation experiments.