Experimental and numerical studies on the crush resistance of aluminum honeycombs with various cell configurations
Experimental and numerical studies on the crush resistance of aluminum honeycombs with various cell configurations
复制标题
不同蜂窝结构铝蜂窝抗压强度的实验和数值研究
DOI：
10.1016/j.ijimpeng.2013.12.009
复制
发表时间：
2014
影响因子：
5.1
通讯作者：
Wen Zhuzhu
中科院分区：
文献类型：
--
作者：
Zhang Xiong;Zhang Hui;Wen Zhuzhu
对不同蜂窝结构的商用铝蜂窝结构进行了试验研究，研究了蜂窝数目和中心角对结构抗平面外压碎性能的影响。结果表明，当蜂窝数目较小时，边界效应对蜂窝结构的抗压强度有较大的影响，且蜂窝结构的强度相差小于10%。采用整体蜂窝模型和Y型单元模型对试件的挤压变形过程进行了数值模拟。数值模拟中考虑了双层铝箔的粘接问题，计算结果与实验数据和理论预测吻合较好。最后，分析了圆心角对蜂窝结构平面外强度影响较小的原因，认为壁厚与圆心角的交互作用是其原因之一。
Commercial aluminum honeycombs with various cell configurations are experimentally tested to study the influence of cell number and central angle on the out-of-plane crush resistance of the structures. The boundary effect is found to have significant impact on the crush strength of the structure when the number of cells is small and the central angle is observed to get a difference less than 10% in the strength of the honeycombs. Numerical analyses based on whole honeycomb model and Y-shaped element model are carried out to simulate the crush and deformation process of the specimens. The adhesive bonding of the double thickness foil is considered in the simulation and the numerical results show good agreement with the experimental data and theoretical predictions. Finally, the reason for the small influence of central angle on the out-of-plane strength of honeycombs is investigated and the interaction effect between wall thickness and central angle is believed to account for it.