蜂窝轴向压缩实验与仿真分析方法研究

Study on honeycomb axial compression test and simulation analysis method

基于蜂窝结构轴向压缩实验,在显式动力学有限元分析仿真平台,研究单元网格大小以及蜂窝封板连接的不同模拟方法对蜂窝结构轴向吸能特性的影响。研究结果表明:单元网格尺度由2 mm减小到0.5 mm时,蜂窝结构的变形模式与实验结果逐渐吻合,蜂窝结构的平台力、平台强度以及吸能量逐渐收敛,与实验结果相比最大误差分别从30%左右降至1%左右。封板连接方式对蜂窝吸能的平台力、平台力以及吸能量影响较小,对蜂窝结构的变形模式影响更加明显,结点耦合与接触固连方式下蜂窝变形模式相似,胶接方式更符合实际情况。

Based on the honeycomb structure axial compression test,using explicit dynamic finite element analysis simulation platform,the effect of grid size and simulation methods for panel connection on the axial energy absorption characteristics of honeycomb structure is studied.The results show that when the grid size of the cell is reduced from2mm to0.5mm,the deformation mode of the honeycomb structure is in agreement with the experimental results gradually,and the platform force,the strength of the platform and the energy absorption of the honeycomb structure is gradually convergent,the maximum error is reduced from30%to about1%compared with the test results.panel connection mode has less influence on the platform force,the strength of the platform and the energy absorption of the honeycomb,the influence of the deformation mode of the honeycomb structure is more obvious.adhesive connection is more suitable for the actual situation.