Numerical Study of Deflection and Stress Distribution on Composite Box Spar Structure – Application In Wind Turbine Blade

This paper present finite element analysis on the internal structure of wind turbine to examined deflection and stress distribution. The was modeled as a cantilever box beam with constant cross section along length. dimension set according original design 10 MW AVATAR (Advanced Aerodynamic Tools for Large Rotors) turbine. proposed materials were unidirectional thin-ply TC35/Epoxy M55/Epoxy carbon composites standard thickness S−Glass 913/Epoxy composite. fibre at spar caps is oriented 90 o shear webs 0 . curve three composite showing non-linear behaviour maximum 2.618 m, 2.429 4.175 m blade tip 913/Epoxy, T35/Epoxy, respectively which less than an existing beam. critical stresses are located top outer surface cap received load directly intersection between where transfer occurs. performance dictated by transverse Young’s Modulus (E 22 ) while longitudinal 11 plays important role