Dynamic crushing behavior and energy absorption of hybrid auxetic metamaterial inspired by Islamic motif art  

作　　者：Ruilan TIAN Huaitong GUAN Xuhao LU Xiaolong ZHANG Huanan HAO Wenjie FENG Guanglei ZHANG 

机构地区：[1]Department of Engineering Mechanics,Hebei Key Laboratory of Mechanics of Intelligent Materials and Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China [2]State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China [3]School of Materials Science and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2023年第3期345-362,共18页应用数学和力学（英文版）

基　　金：the National Natural Science Foundation of China(Nos.12102274,12072203;11872253);the Natural Science Foundation of Hebei Province of China(No.A2022210005);the Central Guidance on Local Science and Technology Development Fund of Hebei Province of China(No.226Z4901G)。

摘　　要：Auxetic honeycomb structures are promising metamaterials with outstanding mechanical properties,and can be potentially used in energy absorption applications.In this study,a novel modified re-entrant hybrid auxetic metamaterial inspired by Islamic motif art is designed by integrating four-pointed double re-entrant motifs with symmetric semi-hexagonal unit cells to achieve a high energy absorption capacity(EAC).Theoretical analyses and numerical simulations are performed to examine the dynamic crushing behavior of the four-pointed double re-entrant combined structure(FDRCS).The developed finite element models(FEMs)are validated by the experiments under quasi-static compression.The deformation mode and stress-strain curves are further studied under low,medium,and high crushing velocities.The theoretically predicted plateau stress of the FDRCS under different crushing velocities is consistent with the numerical simulation results.The crushing stress and the EAC of the FDRCS are influenced by the geometric parameters and crushing velocities.The FDRCS exhibits a negative Poisson's ratio(NPR),owing to the four-point re-entrant structure(RES).Moreover,the specific energy absorption(SEA)of these structures is higher than that of nonauxetic hexagonal and auxetic re-entrant structures,owing to the generation of more plastic hinges that dissipate more energy during dynamic crushing.

关 键 词：re-entrant honeycomb auxetic hybrid metamaterial ENERGY-ABSORPTION dynamic crushing 

分 类 号：TB34[一般工业技术—材料科学与工程]