Ultralight,ductile metal mechanical metamaterials with super elastic admissible strain(0.1)  

作　　者：H.Z.Zhong T.Song R.Das C.W.Li J.F.Gu M.Qian 

机构地区：[1]Institute of Materials Modification and Modelling,Shanghai Jiao Tong University,Shanghai 200240,China [2]Centre for Additive Manufacturing,School of Engineering,RMIT University,Melbourne,VIC 3000,Australia [3]Sir Lawrence Wackett Aerospace Research Centre,School of Engineering,RMIT University,Melbourne,VIC 3000,Australia

出　　处：《Journal of Materials Science & Technology》2023年第31期227-233,共7页材料科学技术（英文版）

基　　金：the China Scholarship Council(CSC)for a CSC scholarship(No.201706230108);Funding from the National Natural Science Foundation of China(No.51971145)and the Australian Research Council(Nos.DP200102666 and No.DE230101344)is acknowledged.

摘　　要：Mechanical metamaterials are architectured cellular materials with unusual properties.Herein we report another type of metal mechanical metamaterials-their elastic admissible strain(EAS)is on the order of 0.1,compared to about 0.01 for common metallic materials.Four conditions are required for a metal mechanical metamaterial to achieve this super EAS:(i)bending-dominated deformation;(ii)low density;(iii)an appropriate lattice topology,and(iv)an intrinsically high EAS for the lattice strut constituent material.The findings of this work extend perspectives on metal mechanical metamaterials.

关 键 词：METAMATERIALS Lattice SUPERELASTICITY Elastic admissible strain Ti-6Al-4V Titanium 

分 类 号：TG139[一般工业技术—材料科学与工程]