Simulation of buckling-driven progressive damage in composite wind turbine blade under extreme wind loads

Ullah, Himayat; Alam, Khurshid; Iqbal, M.; Husain, Afzal; Silberschmidt, Vadim V.

doi:10.1016/j.engfailanal.2022.106574

Cited by 14 publications

(5 citation statements)

References 37 publications

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“…Studies [3,6] have examined the effects of rain and changing wind direction on wind turbine blade stress and aerodynamics by simulation, and the results showed that the conditions of wind and rain coupling would have significant effects on wind turbine blade stress and aerodynamics; however, the angle of wind direction change in this study was fixed and not the same as the actual wind dynamic changing conditions. Previous studies [7][8][9] have analyzed wind turbine blade integrity, progressive damage, and other characteristics by numerically calculating the wind turbine blade stress and other characteristics under extreme wind loads. The results showed that extreme wind loads can lead to structural buckling, which triggers structural bond position failure and severe structural damage.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on coupling characteristics of principal and shear stress of wind turbine under dynamic change of wind direction

Yan,

Wang,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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The wind direction misalignment problem significantly impacts the abnormal alteration in aerodynamic distribution, ultimately resulting in an abnormal stress response of wind turbines. In this study, an experimental method was employed to simulate dynamic wind changes. The study aimed to analyze the laws and mechanisms governing changes in principal and shear stress on wind turbine blades and towers under different wind dynamic change angles. The results revealed that variations in the initial tip speed ratio significantly influenced the stress experienced by the tower during dynamic changes in wind direction. The coupling effect of yaw and gyroscopic moments led to a transient increase in both principal and shear stresses in the wind turbine tower during the early stage of wind direction change. Due to inertia and aerodynamic deterioration, the principal and shear stress values of wind turbine blades and towers exhibited delayed changes. Notably, when the wind direction changed by 15° from the direction the turbine was facing, the principal stress fluctuations in the wind turbine tower and blade were 5.13 and 1.23 times higher, respectively. Therefore, when developing a small-angle yaw strategy, stress fluctuations should be comprehensively considered, in addition to power requirements.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation on coupling characteristics of principal and shear stress of wind turbine under dynamic change of wind direction

Yan,

Wang,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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“…When the wind affects the blade surface, a pressure difference is generated between the intrados and the extrados, generating lift. Given the natural movement of the rotor, the blades are affected by different aerodynamic loads due to the stochastic forces that occur because of wind turbulence [2]. Rotor power is directly related to the forces generated by the blades.…”

Section: Introductionmentioning

confidence: 99%

Angle Calculus-Based Thrust Force Determination on the Blades of a 10 kW Wind Turbine

Dorrego-Portela,

Ponce-Martínez,

Pérez-Chaltell

et al. 2024

Technologies

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In this article, the behavior of the thrust force on the blades of a 10 kW wind turbine was obtained by considering the characteristic wind speed of the Isthmus of Tehuantepec. Analyzing mechanical forces is essential to efficiently and safely design the different elements that make up the wind turbine because the thrust forces are related to the location point and the blade rotation. For this reason, the thrust force generated in each of the three blades of a low-power wind turbine was analyzed. The angular position (θ) of each blade varied from 0° to 120°, the blades were segmented (r), and different wind speeds were tested, such as cutting, design, average, and maximum. The results demonstrate that the thrust force increases proportionally with increasing wind speed and height, but it behaves differently on each blade segment and each angular position. This method determines the angular position and the exact blade segment where the smallest and the most considerable thrust force occurred. Blade 1, positioned at an angular position of 90°, is the blade most affected by the thrust force on P15. When the blade rotates 180°, the thrust force decreases by 9.09 N; this represents a 66.74% decrease. In addition, this study allows the designers to know the blade deflection caused by the thrust force. This information can be used to avoid collision with the tower. The thrust forces caused blade deflections of 10% to 13% concerning the rotor radius used in this study. These results guarantee the operation of the tested generator under their working conditions.

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“…The minimum thickness of carbon fibre required for safe design of beams at various angular speeds was studied. Ullah et al 20 investigated the stability and progressive damage of laminated composite blades under wind loads using ANSYS FE package. A 3D nonlinear finite element analysis was performed to compute the deflection and to identify the zone of stress accumulation.…”

Section: Introductionmentioning

confidence: 99%

Progressive failure prediction of laminated composite thin skew plates under transverse loading using nonlinear strains

Chatterjee,

Ghosh,

Chakravorty

2024

The Journal of Strain Analysis for Engineering Design

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A review of literature about industrially important composite skew plates, which are used as roofing and flooring units to cover non-rectangular parallelogram shaped plan areas, shows that the aspect of progressive failure has not received any attention from researchers which is essential to comprehensively understand failure behaviour from initiation to the ultimate stage. In the present approach stiffness degradation of a damaged plate is considered only at the point of damage in the corresponding lamina at all stages of first and progressive failure and the present outputs match excellently with published experimental results. This realistic modelling of failure behaviour is the novelty of this paper. Apart from reporting the failure load values, the failure zones and nature of damage progress on the skew plate surfaces are also presented which are expected to be valuable inputs for non-destructive health monitoring.

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Simulation of buckling-driven progressive damage in composite wind turbine blade under extreme wind loads

Cited by 14 publications

References 37 publications

Experimental investigation on coupling characteristics of principal and shear stress of wind turbine under dynamic change of wind direction

Experimental investigation on coupling characteristics of principal and shear stress of wind turbine under dynamic change of wind direction

Angle Calculus-Based Thrust Force Determination on the Blades of a 10 kW Wind Turbine

Progressive failure prediction of laminated composite thin skew plates under transverse loading using nonlinear strains

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