Finite Element Model to Predict the Impact of Wrinkles on Wind Turbine Blades

Abstract

Among the manufacturing defects of wind turbine blades, wrinkles are critical to the blade performance, affecting the structural integrity. Therefore, this paper introduces three-dimensional numerical models of laminates representative of a wind turbine blade with artificial wrinkles. The models are verified against static tension-compression experimental tests of laminates embedded with two types of wrinkles. The results show a good correlation between numerical prediction and experimentally obtained stiffness behaviour. The outcome of this analysis proves the validity of the numerical modelling strategy applied to evaluate the behaviour of laminates with wrinkles for a static loading situation.

The Wrinkles Characterization in GFRP Composites by Infrared Active Thermography

“…The effect of defects in composite wind turbine blades has also been investigated by Nelson et al [ 31 ]. The influence of wrinkles on stiffness behavior has been analyzed numerically and experimentally by Mendonca et al [ 32 ], Bender et al [ 33 ], and others. Infrared thermography is a promising method for subsurface defect detection whose effectiveness has been proven in aerospace structures.…”