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

doi:10.1016/j.compstruct.2020.112855

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 journal › Article › peer-review

26 Citations (Scopus)

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 language	English
Article number	112855
Number of pages	10
Journal	Composite Structures
Volume	254
Early online date	26 Aug 2020
DOIs	https://doi.org/10.1016/j.compstruct.2020.112855
Publication status	Published - 15 Dec 2020

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manuscript_v1Accepted author manuscript, 1.9 MBLicence: CC BY-NC-ND

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title = "Twist morphing of a composite rotor blade using a novel metamaterial",

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",

author = "Huaiyuan Gu and Shaw, {Alexander D.} and Mohammadreza Amoozgar and Jiaying Zhang and Chen Wang and Friswell, {Michael I.}",

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T1 - Twist morphing of a composite rotor blade using a novel metamaterial

AU - Gu, Huaiyuan

AU - Shaw, Alexander D.

AU - Amoozgar, Mohammadreza

AU - Zhang, Jiaying

AU - Wang, Chen

AU - Friswell, Michael I.

PY - 2020/12/15

Y1 - 2020/12/15

N2 - 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.

AB - 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.

KW - Metamaterial

KW - Composite rotor blade

KW - Twist morphing

KW - Bend-twist coupling

KW - FE analysis

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DO - 10.1016/j.compstruct.2020.112855

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JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

M1 - 112855

ER -

Twist morphing of a composite rotor blade using a novel metamaterial

Abstract

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