Cut layout optimization for design of kirigami metamaterials under largestretching  

作　　者：Chen Du Yiqiang Wang Zhan Kang 

机构地区：[1]State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,China

出　　处：《Theoretical & Applied Mechanics Letters》2024年第6期460-466,共7页力学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12172075 and 12332007);the Fundamental Research Funds for the Central Universities(Grant No.DUT23RC(5)004).

摘　　要：Kirigami metamaterials have gained increasing attention due to their unusual mechanical properties under largestretching.However,most metamaterial designs obtained with trial-and-error approaches tend to lose their desirable properties under large tensile strains due to occurrence of instability caused by out-of-plane buckling.To cope with this limitation,this paper presents a systematic approach of cut layout optimizing for designingkirigami metamaterials working at large tensile strains by fully exploiting their out-of-plane buckling behaviors.This method can also mitigate the local stress concentration issue at the hinges of conventional kirigami designsworking at in-plane deformation modes.The effectiveness of the proposed method is demonstrated through several examples regarding metamaterial design with negative Poisson’s ratio and specified flip angle pattern.It isshown that the proposed method is capable of addressing the highly nonlinear deformation impacts on the mechanical performance under large stretching,to meet the growing and diverse demands in the field of kirigamimetamaterials.

关 键 词：Kirigami metamaterial Layout optimization Out-of-plane buckling Large stretching 

分 类 号：TG1[金属学及工艺—金属学]