Experimental crushing behavior and energy absorption of angular gradient honeycomb structures under quasi-static and dynamic compression

作     者：Jiachen Li Yuchen Wei Hao Wu Xingyu Shen Mengqi Yuan Jiachen Li;Yuchen Wei;Hao Wu;Xingyu Shen;Mengqi Yuan

作者机构：State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing 100081China Institute of Occupational HealthChina Academy of Safety Science and TechnologyBeijing 100012China Beijing Institute of Technology Chongqing Innovation CenterChongqing 401120China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2024年第36卷第6期

页      面：47-63页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by National Natural Science Foundation of China,China (Grant No.52022012) National Key R&D Program for Young Scientists of China,China (Grant No.2022YFC3080900) 

主　　题：Negative Poisson's ratio Gradient honeycomb structure Quasi-static compression Dynamic impact Titanium alloy 

摘      要：The high variability of shock in terrorist attacks poses a threat to people s lives and properties,necessitating the development of more effective protective *** study focuses on the angle gradient and proposes four different configurations of concave hexagonal honeycomb *** structures macroscopic deformation behavior,stress-strain relationship,and energy dissipation characteristics are evaluated through quasi-static compression and Hopkinson pressure bar impact *** study reveals that,under varying strain rates,the structures deform starting from the weak layer and exhibit significant interlayer ***,interlayer shear slip becomes more pronounced with increasing strain *** terms of quasi-static compression,symmetric gradient structures demonstrate superior energy absorption,particularly the symmetric negative gradient structure(SNG-SMS)with a specific energy absorption of 13.77 J/cm~*** dynamic impact,unidirectional gradient structures exhibit exceptional energy absorption,particularly the unidirectional positive gradient honeycomb structure(UPG-SML)with outstanding mechanical *** angle gradient design plays a crucial role in determining the structure s stability and deformation mode during *** interlayer separations result in a more pronounced negative Poisson s ratio effect and enhance the structure s energy absorption *** findings provide a foundation for the rational design and selection of seismic protection structures in different strain rate impact environments.