Auxetic mechanical metamaterials: from soft to stiff  

作　　者：Xiang Li Weitao Peng Wenwang Wu Jian Xiong Yang Lu 

机构地区：[1]School of Sciences,Nanjing University of Science and Technology,Nanjing 210094,People’s Republic of China [2]School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,People’s Republic of China [3]Center for Composite Materials and Structures,Harbin Institute of Technology,Harbin 150001,People’s Republic of China [4]Nano-Manufacturing Laboratory(NML),CityU-Xidian Joint Laboratory of Micro/NanoManufacturing,Shenzhen Research Institute City University of Hong Kong,Shenzhen 518057,People’s Republic of China [5]Department of Mechanical Engineering,City University of Hong Kong,Kowloon,Hong Kong Special Administrative Region of China,People’s Republic of China [6]Chengdu Research Institute,City University of Hong Kong,Chengdu 610200,People’s Republic of China [7]Department of Mechanical Engineering,The University of Hong Kong,Pokfulam,Hong Kong Special Administrative Region of China,People’s Republic of China

出　　处：《International Journal of Extreme Manufacturing》2023年第4期60-85,共26页极端制造（英文）

基　　金：support from the National Natural Science Foundation of China(Grant No.12102193);Shenzhen-Hong KongMacao Science and Technology Program(Category C)(SGDX2020110309300301);Key R&D Program from the Science and Technology Department of Sichuan Province(Key Science&Technology Project)(No.2022YFSY0001);Changsha Municipal Science and Technology Bureau under the Grant kh2201035.

摘　　要：Auxetic mechanical metamaterials are artificially architected materials that possess negative Poisson’s ratio,demonstrating transversal contracting deformation under external vertical compression loading.Their physical properties are mainly determined by spatial topological configurations.Traditionally,classical auxetic mechanical metamaterials exhibit relatively lower mechanical stiffness,compared to classic stretching dominated architectures.Nevertheless,in recent years,several novel auxetic mechanical metamaterials with high stiffness have been designed and proposed for energy absorption,load-bearing,and thermal-mechanical coupling applications.In this paper,mechanical design methods for designing auxetic structures with soft and stiff mechanical behavior are summarized and classified.For soft auxetic mechanical metamaterials,classic methods,such as using soft basic material,hierarchical design,tensile braided design,and curved ribs,are proposed.In comparison,for stiff auxetic mechanical metamaterials,design schemes,such as hard base material,hierarchical design,composite design,and adding additional load-bearing ribs,are proposed.Multi-functional applications of soft and stiff auxetic mechanical metamaterials are then reviewed.We hope this study could provide some guidelines for designing programmed auxetics with specified mechanical stiffness and deformation abilities according to demand.

关 键 词：AUXETIC mechanical metamaterial SOFT STIFF structural design 

分 类 号：TB34[一般工业技术—材料科学与工程]