碎片对铝合金薄板抗侵彻性能影响数值仿真研究

利用ABAQUS 有限元软件，采用合适材料参数及准则，建立平头弹及碎片撞击2A12-T4铝合金靶板的数值仿真模型。通过改变弹体与碎片之间的相对位置，研究弹体撞击靶板过程中碎片对其抗侵彻特性的影响规律及机理。通过数值仿真计算，分析弹体对靶体的撞击物理过程及失效机制。基于数值仿真计算结果可以发现，碎片对靶体抗侵彻性能受弹体速度以及弹体与碎片之间的相互位置等因素共同作用。对于靶体的抗撞击性能，弹体与碎片之间接触面积存在一个最佳值，接触面积太大或者太小都会减小靶板的损伤面积，从而减少撞击过程中靶板吸收的能量。

Numerical simulation on the impact of debris on the penetration resistance of thin aluminum alloy plate

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.