Programmable mechanical metamaterials based on hierarchical rotating structures. (1st May 2021)

• Record Type: Journal Article
• Authors: Li, Xiang; Fan, Rong; Fan, Zhengjie; Lu, Yang
• Is Part Of: International journal of solids and structures. Volume 216(2021)
• Page Start: 145
• Page End: 155
• Publication Date: 2021-05-01
• Subjects: Mechanical metamaterials -- Hierarchical structure -- Programmable pathway -- Auxetics -- 3D printing -- Flexible; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2021.01.028
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: A novel two-dimensional (2D) mechanical metamaterial with highly programmable mechanical response under compressive load is presented in this paper by introducing hierarchical rotating structures, in which flexible structures are used to replace the rigid part in conventional rotating rigid structures. Multi-step deformation pathways and negative Poisson's ratio were observed in in situ compression experiments and finite element simulations, suggesting that the mechanical behavior of the hierarchical metastructure is highly ordered and can be programmed by constraining angles of the proposed metamaterial. This work offers new insights to create mechanical metamaterial using hierarchical rotating structures for flexible devices and crashworthiness applications.