Air-coupled piezoelectric detection of laser-generated ultrasound.
A pulsed laser has been used to generate ultrasonic transients in samples of metal and fiber-reinforced polymer composite material. These have been detected using an air-coupled piezoelectric transducer. It is demonstrated that such a transduction system can be used for longitudinal waves in bulk material, Rayleigh waves at solid surfaces and Lamb waves in thin plates.
Hutchins
D A
DA
Dept. of Eng., Warwick Univ., Coventry.
Wright
W D
WD
Hayward
G
G
Gachagan
A
A