Title :
Advances in air coupled NDE for rapid scanning applications
Author :
Farlow, R. ; Kelly, S.P. ; Hayward, G.
Abstract :
Results obtained during experiments with a state of the art NDE system are presented. These results demonstrate the sensitivity that can be achieved with modem piezoceramic composite transducers. One set of experiments was concerned with the through transmission inspection of composite sections. These included thick honeycomb structures such as those used in the aircraft industry. The work involved a study of the influence of multiple reflections as a function of transducer airgap separation. Also investigated were the generation and detection of shear waves, Rayleigh waves and Lamb waves. The Lamb wave technique has been used to demonstrate the feasibility of producing real-time images of defects in thin plates of various materials including carbon fibre and aluminium
Keywords :
Rayleigh waves; flaw detection; inspection; piezoelectric transducers; surface acoustic waves; ultrasonic imaging; ultrasonic materials testing; ultrasonic transducers; ultrasonic waves; Lamb waves; Rayleigh waves; US testing; air coupled NDE; multiple reflections; piezoceramic composite transducers; rapid scanning applications; real-time images; shear waves; thin plates; transducer airgap separation; transmission inspection; Acoustic detectors; Acoustic imaging/mapping; Acoustic testing; Flaw detection; Inspection; Nondestructive testing; Piezoelectric transducers; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401781
