EFFECTS OF MAIN BEAM FOR WIND TURBINE BLADES PORE-CONTAINING MECHANICAL PROPERTIES BASED ON MULTISCALE FAILURE ANALYSIS

Wei Xin; Chen Yawen; Ning Wenbo; Bao Hongbing; Li Hui

doi:10.19912/j.0254-0096.tynxb.2024-1506

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 476-484. DOI: 10.19912/j.0254-0096.tynxb.2024-1506

EFFECTS OF MAIN BEAM FOR WIND TURBINE BLADES PORE-CONTAINING MECHANICAL PROPERTIES BASED ON MULTISCALE FAILURE ANALYSIS

Wei Xin, Chen Yawen, Ning Wenbo, Bao Hongbing, Li Hui

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Abstract

Pore flaws formed during the manufacturing process of wind turbine blades directly affect the basic mechanical properties of the overall structure. They decrease the load-carrying capacity and may lead to blade failure. The paper combines macro performance experiments and fine-scale model simulation and utilizes a multiscale analysis method predict the basic mechanical performance parameters of the main beam laminate for wind turbine blades. Firstly, through experimental study and numerical simulation, a fine-scale model of the carbon fiber main beam is established, the relationship between six mechanical property parameters and fiber volume content is obtained, and the validity of the numerical method used in this paper is verified. Furthermore, the fundamental material properties of a large tow carbon filament/epoxy main beam were predicted by utilizing the Monte Carlo approach to develop a model of a carbon fiber main beam with 0-10% pore flaws, assuming that the pore defects are randomly distributed in the matrix. While the other five mechanical property parameters （E₂₂, E₃₃, G₁₂, G₁₃, and G₂₃） were significantly impacted by the pore content, with reduction rates approaching 11%, the fiber directional modulus of elasticity （E₁₁） proved to be insensitive to changes with pore content.

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wind turbine blades / multi scale analysis / pore / laminate / numerical simulation

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Wei Xin, Chen Yawen, Ning Wenbo, Bao Hongbing, Li Hui. EFFECTS OF MAIN BEAM FOR WIND TURBINE BLADES PORE-CONTAINING MECHANICAL PROPERTIES BASED ON MULTISCALE FAILURE ANALYSIS[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 476-484 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1506

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