Abstract：To figure out the characteristics of ceramic fragile projectiles impacting against aluminum plates,a finite element model for the projectiles was built.The LS-DYNA finite element program was used to analyze the variation of the impact force and the effect of projectile velocity on it’s impact properties was investigated.A mathematical model for ceramic fragile projectiles impacting against aluminum plates was also set up for further theoretical analysis.Meanwhile,an authentic experiment was carried out to prove the truth of the numerical simulation and theoretical analysis. All the results show that: ceramic fragile projectiles have good fragmentation property,ceramic fragile projectiles at a suitable velocity may make less damage on aluminum plates,the projectile fragment starts from the round top of ceramic shell,the maximum stress in ceramic shell locates at the edge of impact contact area and that area is the most likely to be damaged in the process of impacting.
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