Abstract：Using ABAQUS finite element software, the numerical simulation model of blunt-nosed projectile and debris impacting 2A12-T4 aluminum alloy plate is established by using appropriate material parameters and criteria. By changing the relative position between the projectile and debris, the influence rule and mechanism of the debris on the penetration resistance of the target plate impacted by projectile are studied. The physical process and failure mechanism of target impacted by target are analyzed by numerical simulation. Based on the numerical simulation results, it can be found that the effect of debris on the penetration resistance of target is affected by the velocity of projectile and the mutual position between projectile and debris. For the ballistic resistance of target, there is an optimum value for the contact area between the projectile and the fragment, and also the damage area of the target plate will be reduced if the contact area is too large or too small, thus reducing the energy absorption of the target in the impact process.
2018, Vol. 39 
