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Cracks measurement using fiber-phased array laser ultrasound generation

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5 Author(s)
Pei, Cuixiang ; School of Engineering, The University of Tokyo, Tokyo 113-0032, Japan ; Demachi, Kazuyuki ; Fukuchi, Tetsuo ; Koyama, Kazuyoshi
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A phased array laser ultrasound generation system by using fiber optic delivery and a custom-designed focusing objective lens has been developed for crack inspection. The enhancement of crack tip diffraction by using phased array laser ultrasound is simulated with finite element method and validated by experiment. A non-contact and non-destructive measurement of inner-surface cracks by time-of-flight diffraction method using fiber-phased array laser ultrasound generation and electromagnetic acoustic transducer detection has been studied.

Published in:

Journal of Applied Physics  (Volume:113 ,  Issue: 16 )

Date of Publication:

Apr 2013

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