Abstract:
In order to assess and verify the bird impact resistance of new configuration composite fan blades, according to the service conditions, the bird impact tests of composite fan blades at different positions and different impact speeds are carried out, and the speed, deformation and strain response of the blades impacted by bird bombs are measured. The whole impact process is recorded by high-speed camera, and the damage modes of composite fan blades are analyzed by nondestructive test. It is found that the composite fan blade has good energy absorption characteristics, and its impact resistance is greatly enhanced by titanium alloy wrapping at the leading edge. Under different impact conditions, only the local damage of fiber and matrix occurs, and there are no phenomena such as breaking and falling off. The conclusions obtained can provide reliable data for the evaluation of bird impact resistance and the verification of bird impact simulation analysis.