Programmable mechanical metamaterials based on hierarchical rotating structures

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)145-155
Journal / PublicationInternational Journal of Solids and Structures
Online published2 Feb 2021
Publication statusPublished - 1 May 2021


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.

Research Area(s)

  • 3D printing, Auxetics, Flexible, Hierarchical structure, Mechanical metamaterials, Programmable pathway