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基于ANSYS/LS-DYNA有限元分析软件建立了蜂窝板的三维全尺寸模型,分析了静态加载速度对模型系统计算精度及计算时间的影响,确定了最优加载速度。分析了三点弯曲情况下蜂窝板的破坏特点,讨论了载荷与挠度的变化规律,并与实验结果进行比较。结果表明,最大应力出现在加载中心蜂窝单层壁板交界处,其弯曲强度为179MPa。上面板产生起皱和凹陷,下面板产生断裂破坏,蜂窝芯很少在下面板破裂前出现剪切破坏。并且模拟结果与实验结果较吻合,因此所建立的有限元模型及相关实验结果为金属蜂窝结构件设计提供了一种有效的数值计算方法。
Based on the finite element analysis software ANSYS / LS-DYNA, a three-dimensional full-scale model of the honeycomb panel was established. The influence of the static loading speed on the calculation accuracy and calculation time of the model system was analyzed and the optimal loading speed was determined. The failure characteristics of honeycomb panels under three-point bending were analyzed. The variation of load and deflection were discussed and compared with the experimental results. The results show that the maximum stress appears at the interface of the loading center honeycomb single wall siding, and its bending strength is 179MPa. The upper panel produces wrinkles and depressions, the lower panel produces fracture failure, and the honeycomb core seldom shear failure before the lower panel ruptures. And the simulation results are in good agreement with the experimental results. Therefore, the finite element model and the related experimental results provided for the design of metal honeycomb structures provide an effective numerical method.