Structural investigation of composite wind turbine blade considering structural collapse in full-scale static tests

Effective Methods for Structural Health Monitoring of Critical Zones of Scalable Wind Turbine Blades

“…The monitoring of WTB made from GFRP have been reviewed in [9], proposing either statistical pattern recognition using simulation or experimental data, or in [19] considering mechanical property testing and full-scale testing as well as nondestructive testing methods. In order to calculate the lifetime of GFRP structures used in WTB construction, it is essential to have access to information about fatigue resistance of the material.…”

“…All these had implications over the blade profile and lead to rethinking of weight and stability of the blade. Some papers [9] studied major design cases meanwhile others [10] were focused on cases with loadings in the design of blades using laser triangulation in order to reduce the design time [11] and the evaluation of their deformations.…”

Failure Test and Finite Element Simulation of a Large Wind Turbine Composite Blade under Static Loading

“…The Brazier effect, which has been argued for its role in the blade failure among several studies [6,8,10] was also examined using the numerical model.…”

“…Overgarrd et al [8,9] tested a 25 m blade to failure under flap-wise bending and concluded that the ultimate strength of the blade was governed by instability phenomena in the form of delamination and buckling instead of the Brazier effect. Yang et al [10] studied the structural collapse of a 40 m blade under flap-wise bending and found that debonding of aerodynamic shells from adhesive joints was a main reason for the blade to collapse. Chou et al [11] investigated a typhoon-damaged composite blade with a blade length close to 39.5 m and showed that the blade failed by delamination and laminate cracking.…”

Finite element based damage assessment of composite tidal turbine blades

“…An overview of the hydrodynamic model used for the initial generation of the chord and twist distribution is provided, together with details of the blade models' construction and the finite element procedure employed. The results were analysed with consideration of experimental work on structural testing of full scale wind turbine blades [15][16][17][18]. The intention is to use knowledge of the failure mode in actual blades under a similar (flapwise) loading situation to inform the analysis and help identify possible high-risk regions on the blades.…”