One of the major problem during shape optimization is unifying the geometricai design and analysis of a structure during an optimization routine.For CAD-FEM coupled shape optimization routine, the re-discretization process of the structure due to change in shape takes most of the time making it expensive in terms of computational time.Isogeometric approach circumvents this issue by using the same shape functions to define the geometry and perform structural analysis.Another advantage of isogeometric analysis is that no approximation of the geometry is made during the analysis since the same functions are used to define the geometry and parameterize the displacements and rotations.Rotor blades, aircraft wings and wind turbines to name a few are assumed to be slender structures so that beam models can be used to describe their structural behaviour.