摘要
要本文研究了具有三角形子结构的二阶层级蜂窝结构(SHT)的面内压缩特性.在此过程中,正六边形蜂窝结构的细胞壁被替换成两层等边三角形作为子结构。研究结果表明,有限元(FE)模拟和理论分析结果具有良好的一致性.为了展现SHT优越的压缩性能,我们将其与不同种类蜂窝结构的压缩性特性进行了比较.在不同的加载速度下,SHT展现出三种变形模式,并定性获得了模式转换的临界速度.此外,本文还进一步讨论了加载速度和相对密度对压缩平台应力和能量吸收能力的影响.
This work reports on the in-plane crushing behaviour of second-order hierarchical honeycombs with triangle substructures(SHT).Here,cell walls of a conventional hexagonal honeycomb were replaced with two-layer equilateral triangles as substructures.Finite element(FE)simulations and analytical modelling were conducted,and a good agreement was found between FE and analytical results.The response of SHT was compared with that of other patterned honeycombs.Three deformation modes were observed under different loading speeds,and critical velocities for mode transforming were obtained qualitatively.The effect of loading speed and relative density on crushing stress and energy absorption capacity was also discussed.
作者
王宇阳
张建军
卢国兴
Ngoc San Ha
项新梅
王丽
Yuyang Wang;Jianjun Zhang;Guoxing Lu;Ngoc San Ha;Xinmei Xiang;Li Wang(School of Engineering,Swinburne University of Technology,Hawihorn,VIC 3122,Australia;Centre for Innovative Structures and Materials,School of Engineering,RMIT University,Melbourne 3001,Australia;School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;School of Mechanical,Electrical and Information Engineering,Shandong University(Weihai),Weihai 264209,China)
基金
supported by the Australian Research Council through Discovery(Grant Nos.DP210103323 and DE220101094)
the National Natural Science Foundation of China(Grant Nos.52078152 and 12002095)
Guangzhou Government-University Union Fund(Grant No.202201020532).
