Rights statement: This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work 3since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 212, 2019 DOI: 10.1016/j.compstruct.2019.01.031
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A multi-scale model for studying failure mechanisms of composite wind turbine blades
AU - Ye, Junjie
AU - Chu, C.
AU - Cai, H.
AU - Hou, X.
AU - Shi, B.
AU - Tian, S.
AU - Chen, X.
AU - Ye, J.
N1 - This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work 3since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 212, 2019 DOI: 10.1016/j.compstruct.2019.01.031
PY - 2019/3/15
Y1 - 2019/3/15
N2 - Composite structures have been widely used in wind turbine equipment for their high stiffness to mass ratio and high strength. A major concern in the use of composite materials is their susceptibility to various micro damage, such as fiber breakage and matrix crack, which will lead to macroscopic structural fracture. In this paper, a multi-scale modeling strategy is proposed to investigate failure mechanisms and damage evolution of composite blades with initial defects from microscopic damage (including fiber fractures and matrix cracks) to macroscopic fracture. At the microscopic scale, an isoparametric micromechanical model is developed to calculate microscopic stresses and simulate microscopic damage. At the laminar scale, the classic laminate theory is employed to evaluate the laminate stiffness. At the structural scale, a reverse modeling technology is proposed to accurately acquire structural dimensions of a wind turbine blade, and a macroscopic 3D model is implemented into ANSYS/LS-DYNA software. By comparing with the experimental data, it is demonstrated that the proposed multi-scale method is suitable to predict mechanical properties of complex composite structures effectively.
AB - Composite structures have been widely used in wind turbine equipment for their high stiffness to mass ratio and high strength. A major concern in the use of composite materials is their susceptibility to various micro damage, such as fiber breakage and matrix crack, which will lead to macroscopic structural fracture. In this paper, a multi-scale modeling strategy is proposed to investigate failure mechanisms and damage evolution of composite blades with initial defects from microscopic damage (including fiber fractures and matrix cracks) to macroscopic fracture. At the microscopic scale, an isoparametric micromechanical model is developed to calculate microscopic stresses and simulate microscopic damage. At the laminar scale, the classic laminate theory is employed to evaluate the laminate stiffness. At the structural scale, a reverse modeling technology is proposed to accurately acquire structural dimensions of a wind turbine blade, and a macroscopic 3D model is implemented into ANSYS/LS-DYNA software. By comparing with the experimental data, it is demonstrated that the proposed multi-scale method is suitable to predict mechanical properties of complex composite structures effectively.
KW - Composites
KW - Damage evolution
KW - FBG sensors
KW - Multiscale model
KW - Wind turbine blade
KW - Composite materials
KW - Cracks
KW - Fracture
KW - Mechanical properties
KW - Stiffness
KW - Structure (composition)
KW - Turbomachine blades
KW - Wind turbines
KW - Complex composite structures
KW - Composite wind turbine blade
KW - FBG sensor
KW - Macroscopic fractures
KW - Micro-mechanical modeling
KW - Multi-scale Modeling
KW - Wind turbine blades
KW - Turbine components
U2 - 10.1016/j.compstruct.2019.01.031
DO - 10.1016/j.compstruct.2019.01.031
M3 - Journal article
VL - 212
SP - 220
EP - 229
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
ER -