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Mechanical Properties of Re-Entrant Hybrid Honeycomb Structures for Morphing Wings

Mechanical Properties of Re-Entrant Hybrid Honeycomb Structures for Morphing Wings

Authors :
Yan Wang
Yingjie Guo
Hui Yang
Source :
Biomimetics, Vol 9, Iss 9, p 521 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

The exceptional energy absorption, deformability, and tuneable Poisson’s ratio properties of negative Poisson’s ratio (NPR) honeycomb biomimetic structures make them highly suitable for applications in aerospace, medical, and acoustic stealth industries. The present study proposes a re-entrant hybrid honeycomb (REHH) structure comprising a re-entrant octagonal unit cell and a re-entrant hexagonal unit cell. Theoretical models of the in-plane elastic modulus and Poisson’s ratio are established based on beam theory, and these models are validated through finite element (FE) simulations and tensile experiments conducted on the REHH samples. The influence of the cell geometry parameters on the in-plane elastic behaviours is investigated. The results indicate that the NPR performance of the REHH structure exhibits superior deformation capability compared with the four-point star hybrid honeycomb (FSHH) structure. The experimental REHH structure samples exhibit significant tensile displacement capabilities in the x-direction.

Details

Language :
English
ISSN :
23137673
Volume :
9
Issue :
9
Database :
Directory of Open Access Journals
Journal :
Biomimetics
Publication Type :
Academic Journal
Accession number :
edsdoj.6fb4b186e13453e959ff302f7b510c9
Document Type :
article
Full Text :
https://doi.org/10.3390/biomimetics9090521