Design and energy absorption characteristics of a novel honeycomb with embedded chiral structures

被引：26
作者：
Bian, Zheng [1 ]
Gong, Yu [1 ,2 ]
Sun, Zhixuan [1 ]
Zhao, Libin [3 ,4 ]
Zhang, Jianyu [1 ,2 ]
Hu, Ning [1 ,3 ]
机构：
[1] Chongqing Univ, Coll Aerosp Engn, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Chongqing Key Lab Heterogeneous Mat Mech, Chongqing 400044, Peoples R China
[3] Hebei Univ Technol, Sch Mech Engn, State Key Lab Reliabil & Intelligence Elect Equipm, Tianjin 300401, Peoples R China
[4] Hebei Univ Technol, Key Lab Adv Intelligent Protect Equipment Technol, Minist Educ, Tianjin 300401, Peoples R China
来源：
COMPOSITE STRUCTURES | 2024年 / 333卷
基金：
中国国家自然科学基金;
关键词：
Hybrid honeycombs; Chiral; Additive manufacturing; Energy absorption; Mechanical response; NEGATIVE POISSONS RATIO; THIN-WALLED TUBES;
D O I：
10.1016/j.compstruct.2024.117944
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Honeycomb structure as a thin -walled structure has excellent mechanical properties. In this work, three types of novel embedded chiral honeycomb (ECH) structures are proposed based on a hybrid strategy and manufactured by using the additive manufacturing (AM) technique. Quasi -static uniaxial compression tests in lateral and diagonal loading are carried out. The loading -displacement curves and deformation modes of ECHs are recorded and analyzed. The numerical models are established and its simulation results are in good agreement with the experiments. The results show chiral units have a significant enhancement on macro mechanical properties. It is found that ECH4 has the best energy absorption characteristics (EA of 49.52 J, SEA of 1.55 J/g) in lateral loading and ECH3 has the best (EA of 62.25 J, SEA of 2.14 J/g) in diagonal loading. The deformation patterns of structures are also discussed. Moreover, the effects of geometric parameters on the mechanical responses of ECHs are analyzed, including the effects of the circular node radii and the wall thickness. The optimal interval of parameter design is finally determined. The findings from this study are helpful for a new topology optimization design for hexagonal honeycomb structures with enhanced mechanical properties.
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页数：12
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