Programmable mechanical metamaterials based on hierarchical rotating structures

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 structur...

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Bibliographic Details
Published inInternational journal of solids and structures Vol. 216; pp. 145 - 155
Main Authors Li, Xiang, Fan, Rong, Fan, Zhengjie, Lu, Yang
Format Journal Article
LanguageEnglish
Published New York Elsevier Ltd 01.05.2021
Elsevier BV
Subjects
3D printing
Auxetics
Crashworthiness
Flexible
Flexible structures
Hierarchical structure
Impact strength
Mechanical analysis
Mechanical metamaterials
Mechanical properties
Metamaterials
Poisson's ratio
Programmable pathway
Rigid structures
Rotation
Structural hierarchy
Programmable pathway
Flexible
Mechanical metamaterials
Auxetics
3D printing
Hierarchical structure
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Summary: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.
ISSN:0020-7683
1879-2146
DOI:10.1016/j.ijsolstr.2021.01.028