High Speed Impact Response of CFRP Clad Blades

In this paper, Ls-dyna was used to establish a high fidelity CFRP coated blade high-speed impact model, and the blade layup sequence is [45○/− 45○]5 s. Five common propeller conditions were selected for high-speed impact simulation. It is found that the energy absorbed by blade increases with the increase of impact velocity before blade penetration. The resistance performance of blades at different impact locations to high-speed impact is different under different working conditions. The lower the blade speed, the thicker the hard foam blade is more difficult to penetrate. The bottom layer of the skin bears the greatest stress at − 45°. The results show that the high-speed impact resistance under sliding condition is better than other conditions. The blade resistance to high-speed impact has obvious velocity effect. The different layering sequence has certain influence on the impact resistance of the blade. The blade absorbs energy mainly through deformation and fracture of composite materials and breakage of sandwich materials. No fracture damage will occur in the impact blade at the conventional speed. The lightweight blade required in aviation can resist the impact at the conventional speed.