Infrared Thermal Wave NDT for Helicopter Blades Debonding

摘要

The principle of the infrared thermal wave NDT is researched. According to the structural characteristics of the helicopter blade, the heat transfer process is analyzed. The method to differentiate the debonding region and the normal region is also proposed. The experiment of the infrared testing method is completed on a helicopter rail rotor blade with debonding damages. The ther-mogram and the peak amplitude image of the second derivative thermogram are both analyzed. The experiment shows that the infrared thermal wave testing method can effectively detect debonding flaws in some helicopter blades.