Lock-in Infrared Thermography in Composite Bonding Structure

Different kinds of defects are found in curved composite bonding structures both in manufacturing and in serving stages. Nondestructive testing methods available now are not capable of the in-situ testing of curved composite bonding structure with high speed. Lock-in infrared thermography is characterized by non-contact, large-sized testing area, audio-visual results, et al. It is fit for the in-situ testing of curved composite bonding structure. The best testing conditions of Lock-in infrared thermography are obtained by testing of defects in composite bonding structure samples. The in-situ testing is experimented industrially. It is shown that the lock-in infrared thermography could be applied to curved composite bonding structures in manufacturing, repairing and serving stages.