Simulative analysis and experimental test of composite fragile projectile under impact dynamics

Dynamic mechanics parameters of composite fragile projectile and aviation organic glass are obtained by split Hopkinson press bar (SHPB) experiment. The reasonable material constitutive models are chosen to model the fragile projectile and organic glass based on LS-DYNA software. The simulation of the fragmentation process of fragile projectile penetrating target is carried out with smoothed particle hydrodynamics(SPH) method. The influence rule of projectile frangibility and damage performance is researched by analyzing the falling speed and impacting angle of projectile, and the relevant results are summarized by comparing the fragile and damage performances. Simulation result shows that the performances of fragmentation and penetration increase as the incident velocity increases, and at the same velocity, the performances of fragmentation and penetration under normal penetrating are superior to oblique penetrating. Numerical simulation and analysis of results offer a theoretical reference for the study of fragile projectile.