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A Novel Strategy for Constructing 3D Dislocated Chiral Metamaterial with Negative Poisson's Ratio
Author(s) -
Zhong Rongchang,
Zheng Binbin,
Fu Minghui
Publication year - 2021
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.202000991
Subject(s) - metamaterial , materials science , auxetics , rod , poisson's ratio , structural engineering , poisson distribution , composite material , optoelectronics , engineering , mathematics , statistics , medicine , alternative medicine , pathology
Metamaterials with negative Poisson's ratio (NPR) have a broad range of application background, such as aerospace engineering, automotive engineering, medical instrument engineering, and wearable engineering. Herein, a novel strategy for constructing 3D dislocated chiral metamaterial is proposed that can achieve NPR effect in three directions. According to this strategy, a new dislocated chiral metamaterial composed of dislocated tetrachiral honeycombs and inclined rods is designed and selected as an example to investigate the effectiveness of the strategy. Experiments and numerical simulations are carried out to study the mechanical properties of the new metamaterial, confirming that this metamaterial exhibits NPR effect. The influence of geometric parameters on the elastic constants of the metamaterial is discussed based on experimental and numerical results. Meanwhile, the local loading performances of this dislocated chiral metamaterial and the previous aligned chiral metamaterial are studied and compared. Results show that this dislocated metamaterial possesses a stronger damage resistance capacity than the aligned one. By adjusting the rotational direction of ligaments in honeycombs and the arrangement of inclined rods, more special 3D dislocated chiral metamaterials with advanced properties are available, such as metamaterial with both positive and NPRs, metamaterial with compression–torsion effect.