Dynamic crushing behaviors and enhanced energy absorption of bio-inspired hierarchical honeycombs with different topologies  

作　　者：Xin-chun Zhang Nan-nan Liu Chao-chao An He-xiang Wu Na Li Ke-ming Hao 

机构地区：[1]Department of Mechanical Engineering,North China Electric Power University,Baoding,071003,China [2]Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention,North China Electric Power University,Baoding,071003,China [3]School of Civil Engineering,Northeast Forestry University,Harbin,150040,China [4]Department of Intelligent Engineering,Hebei Software Institute,Baoding,071000,China

出　　处：《Defence Technology（防务技术）》2023年第4期99-111,共13页Defence Technology

基　　金：the financial support provided by the Natural Science Foundation of Hebei Province of China [No. A2020502005];the Fundamental Research Funds for the Central Universities [No. 2020MS113];Science & Technology Program of Baoding [No. 1911ZG019]。

摘　　要：In order to pursue good crushing load uniformity and enchance energy absorption efficiency of conventional honeycombs, a kind of bio-inspired hierarchical honeycomb model is proposed by mimicking the arched crab shell structures. Three bio-inspired hierarchical honeycombs(BHHs) with different topologies are designed by replacing each vertex of square honeycombs with smaller arc-shaped structures. The effects of hierarchical topologies and multi-material layout on in-plane dynamic crushings and absorbed-energy capacities of the BHHs are explored based on the explicit finite element(FE) analysis.Different deformation modes can be observed from the BHHs, which mainly depend upon hierarchical topologies and impact velocities. According to energy efficiency method and one-dimensional(1D) shock theory, calculation formulas of densification strains and plateau stresses for the BHHs are derived to characterize the dynamic bearing capacity, which is consistent well with FE results. Compared with conventional honeycombs, the crushing load efficiency and energy absorption capacity of the BHHs can be improved by changing the proper hierarchical topology and multi-material layout. These researches will provide theoretical guidance for innovative design and dynamic response performance controllability of honeycombs.

关 键 词：Bio-inspired honeycombs Crushing load uniformity Energy absorption Hierarchical topologies Finite element analysis 

分 类 号：TB383.4[一般工业技术—材料科学与工程]