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Twist morphing of a composite rotor blade using a novel metamaterial / Huaiyuan Gu; Alexander Shaw; Mohammadreza Amoozgar; Jiaying Zhang; Chengyuan Wang; Michael Friswell

Composite Structures, Volume: 254, Start page: 112855

Swansea University Authors: Huaiyuan, Gu, Alexander, Shaw, Jiaying, Zhang, Chengyuan, Wang, Michael, Friswell

  • Accepted Manuscript under embargo until: 26th August 2021

Abstract

A novel meta-material has been designed and implemented into a rotor blade to enhance aerodynamic efficiency by achieving a passive twist during rotation. The twist is induced by bend-twist coupling exhibited in the meta-material, which is created to possess anisotropic elastic properties at the bul...

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Published in: Composite Structures
ISSN: 0263-8223
Published: Elsevier BV 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa55080
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Abstract: A novel meta-material has been designed and implemented into a rotor blade to enhance aerodynamic efficiency by achieving a passive twist during rotation. The twist is induced by bend-twist coupling exhibited in the meta-material, which is created to possess anisotropic elastic properties at the bulk level. A concept design of a rectangular blade spar is proposed where the metamaterial is used as the core material to induce twist. Using finite element analysis(FEA) we demonstrate how the bend-twist property of the blade spar is governed by cell geometries of the core material. The twist is activated by a lagwise bending moment generated from a movable mass at the blade tip due to off-centre centrifugal forces. The relationship between the twist, mass location and rotational speed has been explored. Moreover, it was found that the bend-twist property achieved by the proposed blade spar is more effective compared to that of an anisotropic thin-walled composite beam.
Keywords: Metamaterial, Composite rotor blade, Twist morphing, Bend-twist coupling, FE analysis
College: College of Engineering
Start Page: 112855