Critical transitions in the shape morphing of kirigami metallic glass

作     者：D.X.Han L.Zhao S.H.Chen G.Wang K.C.Chan D.X.Han;L.Zhao;S.H.Chen;G.Wang;K.C.Chan

作者机构：Advanced Manufacturing Technology Research CenterDepartment of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung HornKowloonHong KongChina School of Mechanical EngineeringHefei University of TechnologyHefei230009China Laboratory for MicrostructuresInstitute of MaterialsShanghai UniversityShanghai200444China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第61卷第2期

页      面：204-212页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region China(Project No.PolyU 15222017) 

主　　题：Metamaterial Kirigami metallic glass Critical load Size effect Beam deflection 

摘      要：Kirigami, the ancient Japanese paper cutting technique, has been applied to achieve high stretchability and low energy loss of designed metallic glass. Despite the exploration of the underlying deformation mechanism of kirigami-inspired structures from the energy point of view, the morphable responses of the kirigami patterns and the origin of the kirigami response are yet to be fully understood. This study reveals the mechanical driven-forms of the kirigami structure with the corresponding deformation stages. Based on the beam deflection theory, the elastic buckling behavior of kirigami metallic glass is manifested and a critical force prediction model is developed. Moreover, a force concentration parameter is introduced in the rigid-plastic deformation stage, predicting the nominal ultimate force. The kirigami-inspired facture force is firstly proposed. The findings of these models are in good agreement with the experimental sizedependent kirigami responses, and expected to provide significant insights into the understanding of the deformation behavior and the design of kirigami metallic glasses.