Impact of sand on the blades of airplane engines

In order to study the impacts of sand on the airplane engine blades, a theoretic model of permanent notch and rebound coefficient is established by simulating engine blades with transversely isotropic material. The numerical result shows that the permanent notch becomes deeper and the rebound coefficient becomes less when the values of Poisson ratio and shear modulus along the impact direction increase. But the permanent notch will become shallower and then become deeper when the values of the Young modulus along the impact direction increase. A theoretic fundamental analysis is given for the design of engine blades of transversely isotropic material to sustain the impacts.