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Article Dans Une Revue Journal of the Acoustical Society of America Année : 2012

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

Résumé

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.

Dates et versions

hal-02354126 , version 1 (07-11-2019)

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Citer

Chen-Yin Ni, Nikolay Chigarev, Vincent Tournat, N. Delorme, Zhong-Hua Shen, et al.. Probing of laser-induced crack modulation by laser-monitored surface waves and surface skimming bulk waves. Journal of the Acoustical Society of America, 2012, 131 (3), pp.EL250-EL255. ⟨10.1121/1.3684737⟩. ⟨hal-02354126⟩
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