Twist morphing of a composite rotor blade using a novel metamaterial

Huaiyuan Gu, Alexander D. Shaw, Mohammadreza Amoozgar, Jiaying Zhang, Chen Wang, Michael I. Friswell

Research output: Contribution to journalArticle

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.
Original languageEnglish
Article number112855
Number of pages10
JournalComposite Structures
Volume254
Early online date26 Aug 2020
DOIs
Publication statusE-pub ahead of print - 26 Aug 2020

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