Abstract：Compress and fracture of gun propellant charge is one the fundamental reason of breach blow, the fracture dynamics of charge bed is one of the theoretical foundations in the research field of launch safety. Based on discrete element method, the packing process of propellant bed under gravity is simulated, and the close-grained structure of propellant bed was acquired; then the propellant grains were divided into spring-spheres system, applying Mohr-Coulomb failure rule, the compress and fracture process of propellant grains under impact load was simulated. In addition, the dynamic display was displayed by post processing, which reproduced the compress and fracture process of propellant grains in simulation chamber, and the computation mode provides a kind of important theoretical foundation and computation method for the study of fracture law of charge bed.
2011, Vol. 32 
