Application of golay complementary coded excitation schemes for non-destructive testing of sandwich structures

- A novel Golay coded infrared/thermal wave imaging is introduced.
- Time domain analysis scheme is proposed for testing of sandwich structures.
- Experimental results show the improved performance for detection of delaminations.

In recent years, InfraRed Thermography (IRT) has become a widely accepted non-destructive testing technique to evaluate the structural integrity of composite sandwich structures due to its full-field, remote, fast and in-service inspection capabilities. This paper presents a novel infrared thermographic approach named as Golay complementary coded thermal wave imaging is presented to detect disbonds in a sandwich structure having face sheets from Glass/Carbon Fibre Reinforced (GFR/CFR) laminates and core of the wooden block.