Automated, Rapid Non-Destructive Inspection (NDI) of Large Scale Composite Structures

Phase II.5 proposal, an extension of Phase II contract N092-097. In the previous Phase II program, TWI demonstrated that Large Standoff / Large Area Thermography (LASLAT) can successfully be applied to Nondestructive Inspection (NDI) of composite aircraft structures. The method employed was based on optical excitation using a novel projector and signal processing developed by TWI. Capability was demonstrated on a composite structure at a standoff distance of 12 ft. In Phase II.5, the concept will be refined and implemented for maintenance hangar inspection of F-18 fuel tanks, common flight control surfaces and E2-C/D radar domes . Improvements will include miniaturization of hardware, improving scan and inspection automation, and tools for exporting inspection results to NDI data management software. A general procedure for determining appropriate inspection parameters for a new inspection will be provided. Limits of detectability for materials and flaws of interest at a 10 ft. standoff distance will be determined through modeling and experiment. The needed LASLAT system changes will be developed at FR-CSW to meet the specific COMFRC F/A-18 Depot needs.