Innovative Thin-Walled Structure with Transverse Negative Poisson’s Ratio for High-Performance Crashworthiness  

作　　者：Bin Wang Yongtao Sun 

机构地区：[1]Tianjin Key Laboratory of Soft Soils and Engineering Environment,Tianjin Chengjian University,Tianjin 300384,China [2]Department of Mechanics and Tianjin Key Laboratory of Nonlinear Dynamics and Control,Tianjin University,Tianjin 300350,China

出　　处：《Acta Mechanica Solida Sinica》2023年第1期34-44,共11页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12021002,12072222,12132010 and 11991032);the State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures(Grant No.SKLTESKF1901).

摘　　要：In this paper,an innovative type of thin-walled structures,the convex-concave honeycomb columns(CCHCs)with transverse negative Poisson’s ratio(NPR),is proposed for energy absorbers by replacing the cell walls of square honeycomb lattice columns with sine-shaped or zigzag-shaped walls of equal mass.Numerical simulations show that,under axial impact,contrary to the conventional square honeycomb columns of equal mass,the transverse cross section of NPR CCHC shrinks inward,making the cell walls of CCHC contact and interact sufficiently with each other and thus dissipate the impact energy much more effectively.By suitably adjusting the transverse NPR,the CCHC can have the combined advantages of effective total energy absorption,high specific energy absorption and low maximum peak crushing force.The research of this paper provides a new strategy for the design of high-performance energy absorbers widely used in the engineering fields of vehicle engineering,aerospace engineering etc.

关 键 词：Energy absorbers Convex-concave honeycomb columns(CCHC) Transverse negative Poisson’s ratio Axial impact High-performance crashworthiness 

分 类 号：TG3[金属学及工艺—金属压力加工]