Probing of laser-induced crack modulation by laser-monitored surface waves and surface skimming bulk waves | Zendy

Chenyin Ni | Zendy; Nikolay Chigarev | Zendy; Vincent Tournat | Zendy; Nicolas Delorme | Zendy; Zhonghua Shen | Zendy; Vitalyi Gusev | Zendy

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Probing of laser-induced crack modulation by laser-monitored surface waves and surface skimming bulk waves

Author(s) -

Chenyin Ni,

Nikolay Chigarev,

Vincent Tournat,

Nicolas Delorme,

Zhonghua Shen,

Vitalyi Gusev

Publication year - 2012

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.3684737

Subject(s) - rayleigh wave , materials science , optics , laser , rayleigh scattering , acoustic wave , modulation (music) , acoustics , surface wave , surface acoustic wave , reflection (computer programming) , ultrasonic sensor , physics , computer science , programming language

All-optical monitoring of the nonlinear motion of a surface-breaking crack is reported. Crack closing is induced by quasi-continuous laser heating, while Rayleigh surface acoustic pulses and bulk longitudinal surface skimming acoustic pulses are also generated and detected by lasers. By exploiting the strong dependence of the acoustic pulses reflection and transmission efficiency on the state-open or closed-of the contacts between the crack faces, the parametric modulation of ultrasonic pulses is achieved. It is observed that bulk acoustic waves skimming along the surface can be more sensitive to crack motion than Rayleigh surface waves.

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