Multi-stable straw-like carbon nanotubes for mechanical programmability at microscale  

作　　者：Jia Liu Yong Ma Wanjie Ren Fei Pan Shu Guo Yuli Chen Bin Ding 

机构地区：[1]National Key Laboratory of Strength and Structural Integrity,Institute of Solid Mechanics,Beihang University(BUAA),Bejing,PR China [2]Institute of Extreme Mechanics,Northwestern Polytechnical University,Xi'an,Shaanxi,PR China [3]Fuselage Department,Shanghai Aircraft Design and Research Institute,Shanghai,PR China [4]School of Vehicle and Energy,Yanshan University,Qinhuangdao,PR China

出　　处：《International Journal of Smart and Nano Materials》2024年第1期95-109,共15页国际智能和纳米材料杂志（英文）

基　　金：the National Natural Science Foundation of China(Nos.12225201 and 12102021);the China Postdoctoral Science Foundation(No.2020M680287)are gratefully acknowledged.

摘　　要：Inspired by macroscale 3D pixel mechanical metamaterials and microscale straw-like carbon nanotube,we propose a design of multi-stable straw-like carbon nanotubes(MSCNT)via optimizing the structure of a unit to obtain multiple stable states under dis-placement loading by molecular dynamics.The unit of MSCNT is mirror-symmetrically connected two truncated graphene cones with specific apex angles.By switching the LJ term in AIREBO potential,we verify that the bistability of unit is co-determined by snap-through instability and microscale adhesions.Moreover,we examine the validity of the multi-stability of the unit cells arranged in series and in parallels.Simulation results indicate that the MSCNT can achieve mechanical programmability in microscale,which triggers many potential applications in need of customizing nanos-cale mechanical behaviors.

关 键 词：Multi-stable state straw-shaped carbon nanotube microscale adhesions mechanical programmability 

分 类 号：TB383[一般工业技术—材料科学与工程]