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| Applications of Laser Ultrasonic Technology on Composite Structure Testing |
| JI Hongli, ZHANG Chao, QIU Jinhao |
(State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and
Astronautics, Nanjing 210016, China) |
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Abstract Laser ultrasonic technique employs pulse laser to generate the Lamb waves in the structures, achieving
long-distance and non-contact Lamb wave measurement. Aiming at the problems of the safety and reliability detection in
aviation composite structures, the research topics on laser ultrasonic based composite structure testing are carried out at
Nanjing University of Aeronautics and Astronautics. Novel signal processing methods have been developed to extract the
Lamb wave propagation characteristics, which can be used in damage imaging, stiffness reconstruction and fatigue property
evaluation. The theoretical and experimental results show that laser ultrasonic technique can provide a novel non-destructive
testing method for the composite structures in the aviation industry.
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2017, 
