3H-4 Measurement of Spatial Distribution of Crack Tips Using Low Power Laser Pulses

Author

Matsukawa, Mami ; Miyake, Tomohiro ; Fujii, Hiroshi

Author_Institution

Dept. of Electron., Doshisha Univ., Kyoto

fYear

2006

fDate

2-6 Oct. 2006

Firstpage

776

Lastpage

779

Abstract

An interesting system to detect plane micro cracks in solid materials is proposed. In this system, we have made use of two techniques, two-layered self-made transducers and the low power laser pulses to induce short elastic waves. Here, the two-layered transducer has two roles, transmission of the large amplitude low frequency wave (500 kHz) from PZT transmitter and wideband receiver made of PVDF film. The low frequency excitation causes the fluctuation of closed cracks. With the combination of these techniques, we have succeeded in the measurement of interesting two dimensional images which are in good accordance with the expected position of crack tips

Keywords

microcracks; ultrasonic materials testing; ultrasonic transducers; 500 kHz; PVDF film; PZT transmitter; crack tips; elastic waves; low frequency excitation; low power laser pulses; plane micro cracks; self-made transducers; solid materials; two-layered transducers; wideband receiver; Frequency; Optical materials; Optical pulses; Power lasers; Power measurement; Pulse measurements; Solids; Transducers; Transmitters; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2006. IEEE

Conference_Location

Vancouver, BC

ISSN

1051-0117

Print_ISBN

1-4244-0201-8

Electronic_ISBN

1051-0117

Type

conf

DOI

10.1109/ULTSYM.2006.200

Filename

4152056