立方体破片对铝合金板冲击的数值仿真

为研究不同强度铝合金板受立方体破片冲击的损伤特性及失效机理，利用有限元软件ABAQUS/Explicit建立了立方体破片以不同着靶姿态冲击不同强度铝合金靶板的模型，分析了破片着靶姿态、靶板强度对靶体防护性能、失效模式和能量吸收的影响规律及机理。研究结果表明：立方体破片点接触着靶冲击时弹道极限速度高于面接触着靶冲击时弹道极限速度;弹道极限速度并不是随着靶板强度的增大而单调增大，而是呈现先增大后减小的趋势，即存在一个最佳强度使得靶板的抗冲击性能最优;靶板强度和破片着靶姿态对靶体失效模式、能量吸收情况均存在显著影响，但各因素影响程度与机理存在差异。

Numerical Simulations of Aluminum Alloy Plates against Cube Fragment Impacts

In order to study the damage characteristics and failure mechanism of different strength aluminum alloy plates impacted by cube fragments, the models of cube fragment impacting different strength aluminum alloy targets with different initial gesture were built by finite element software ABAQUS/Explicit， the effects and mechanism of initial gesture of fragments and strength of target on the ballistic characteristics were analyzed, including protective performance, failure mode and energy absorption. The results show that the ballistic limit  velocity of point contact with target is higher than that of surface contact. The ballistic limit velocity does not increase monotonically with the increase in target strength, but rather increases first and then decreases, there is an optimum strength to makes the target resistance optimal. Target strength and the initial gesture of fragment have a significant effect on the target failure mode and energy absorption, but the influence degree and mechanism of each factor are different.