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Master's Thesis from the year 2013 in the subject Engineering - Mechanical Engineering, grade: 4.06/4.5 GPa, , language: English, abstract: In the wind industry, the current trend is towards building larger and largerturbines. This presents additional structural challenges and requires blade materials thatare both lighter and stiffer than the ones presently used. This work is aimed to aid thework of designing new wind turbine blades by providing a comparative study of differentcomposite materials.A coupled Finite-Element-Method (FEM) - Blade Element Momentum (BEM) code wasused to simulate the aerodynamic forces subjected on the blade. The developed BEMcode was written using LabView allowing an iterative numerical approach solver takinginto the consideration the unsteady aerodynamic effects and off -design performanceissues such as Tip Loss, Hub Loss and Turbulent Wake State therefore developing a morerational aerodynamic model. For this thesis, the finite element study was conducted onthe Static Structural Workbench of ANSYS, as for the geometry of the blade it wasimported from a previous study prepared by Cornell University. Confirmation of theperformance analysis of the chosen wind turbine blade are presented and discussed bladeincluding the generated power, tip deflection, thrust and tangential force for a steady flowof 8m/s.The elastic and ultimate strength properties were provided by Hallal et al. The Tsai-Hill and Hoffman failure criterions were both conducted to the resulting stresses andshears for each blade composite material structure to determine the presence of staticrupture. A progressive fatigue damage model was conducted to simulate the fatiguebehavior of laminated composite materials, an algorithm developed by Shokrieh.It is concluded that with respect to a material blade design cycle, the coupling between afinite element package and blade element and momentum code under steady and staticconditions can be useful. Especially when an integration between this coupled approachand a dynamic simulation tool could be established, a more advanced flexible bladedesign can be then analyzed for a novel generation of more flexible wind turbine blades.