The main purpose of this thesis is to develop a 3D beam element in order to model wind turbine wings made of composite materials.
The proposed element is partly based on the formulation of the classical beam element of constant cross-section without shear deformation (Euler-Bernoulli) and including Saint-Venant torsional effects for isotropic materials, similarly to the one presented in Batoz & Dhatt. The main novelty consists in the addition of the coupling between axial and bending with torsional effects that may arise when using composite materials.