Title :
Measurement of three-dimensional distribution of crack tips by low power pulsed laser
Author :
Miyamoto, Atsushi ; Matsukawa, Mami
Author_Institution :
Lab. of Ultrasonic Electron., Doshisha Univ., Kyotanabe, Japan
Abstract :
A simple measurement technique to evaluate micro cracks in a solid PMMA specimen is studied. Taking advantages of laser induced pulsed waves, and a two-layered transducer composed of PVDF and ceramic transducers, we have tried to obtain three dimensional images of the crack. By using the large amplitudes and low frequency vibration by the PZT transducer, we have obtained interesting images, which seem to show the position of crack tips.
Keywords :
crack detection; laser beam effects; microcracks; photoacoustic effect; piezoelectric transducers; resins; vibrations; 3D crack tip distribution measurement; PMMA specimen; PVDF transducer; PZT; PZT transducer; ceramic transducer; laser induced pulsed wave; low power pulsed laser; microcracks; two layered transducer; vibration; Optical pulses; Power lasers; Power measurement; Pulse measurements; crack tips; laser induced pulsed wave; three-dimensional distribution; two-layered transducer;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441524
