层间配置对成层式铝蜂窝吸能特性的影响

摘要

To investigate the effect of layer configuration on the energy absorption of layered aluminum honeycomb, the expe-riments of layered aluminum honeycomb structure under quasi-static load was carried out, mainly includes single, double, triple, four layer combinations.The results showed that the peak force and the mean plateau force of single-layer aluminum honeycomb structure were proportional to the surface density but declined slightly with increase of the height.Layered aluminum honeycomb is better than single layer honeycomb though the mass and size is the same.The double layered aluminum honeycomb structure with unequal height has more advantage in cushion performance.For the same honeycomb,with the increase of number of layers,MP values show a trend of gradual decline.According to the crush behavior of layered aluminum honeycomb, it could be inferred that energy absorption of honeycomb cannot fully play its role when the number of layers is no less than four.Placing soft layer between hard layers is a better choice.%为了考察层间配置对成层式铝蜂窝吸能特性的影响,设计了由4种类型铝蜂窝组成的多种成层式铝蜂窝结构,主要包括单层、双层、三层、四层的组合形式,分别对其进行准静力单轴压缩试验.结果表明:峰值力和平均平台力与面密度成正比,但随着蜂窝高度的增加,二者略微下降;等质量等尺寸的条件下,成层式蜂窝优于单层蜂窝;对比双层铝蜂窝结构发现,不等高成层结构更具缓冲吸能优势;对于同种蜂窝,随着叠层数的增加,MP值逐渐下降;根据压溃行为分析可知,当成层式铝蜂窝结构的层数大于等于4时,不能充分发挥其缓冲吸能作用.考虑到降低峰值力同时提高吸能水平,将上下层设置较硬型铝蜂窝、中间层设置较软型铝蜂窝的成层式结构可优先选择.