三角形蜂窝在面内冲击荷载下的力学性能

摘要：通过数值计算研究规则排布和交错排布的三角形铝蜂窝在面内冲击荷载下的变形模式、承载能力以及能量吸收特性。结果表明两种蜂窝的变形均随着冲击速度的增加或胞壁厚度的减小而向冲击端集中，规则排布的蜂窝沿着局部变形带逐行压溃直至密实，而交错排布蜂窝的变形模式可分为4种。铝蜂窝吸收的能量绝大部分转化为变形所需的内能，动能所占比重较小。随着冲击速度的提高，两种排布方式的蜂窝均表现出更强的承载能力和能量吸收能力，但内能在总能量中的比重减小，动能比重增加。规则排布的蜂窝比交错排布的蜂窝具有更高的承载力和能量吸收能力，该差别主要是由于二者内能的不同所引起，且该差值在交错排布蜂窝“核区”形成后逐渐减小。

Mechanical properties of triangular honeycombs under in-plane impact loading

The deformation patterns,the load-bearing capacity,and the energy absorption behavior of honeycombs filled with regular-arranged and stagger-arranged triangular cells under in-plane impact were studied by using numerical simulation.The results showed that the deformation bound of honeycombs is gradually concentrated to the impact place with increase in impact velocity or decrease in cell wall thickness;the honeycomb filled with regular-arranged cells is crushed row by row to densification,while four kinds o...