Fatigue and damage to composite structures

In this work we studied fatigue fracture and crack in composite aircraft. In which we studied airfoil NACA 2412 made of glass fiber.First in the experimental part experiments were carried out on two laminate plates(carbon/glass) with 8 plies the first one controlled by ultrasonicmethode non destructive testing techniques (NDT) to detect cracks and also determine the mechanical caractérization. And other traction experience on both plates and have the results.Secondly the simulation of airfoil NACA 2412 deduce displacement deformation stresses and strain 7 modes shapes and natural frequencies.