Non-contact and non-destructive Lamb wave generation using laser-induced plasma shock wave

Hosoya, Naoki; Yoshinaga, Atsushi; Kanda, Atsushi; Kajiwara, Itsuro

Non-contact and non-destructive Lamb wave generation using laser-induced plasma shock wave

Hosoya, Naoki; Yoshinaga, Atsushi; Kanda, Atsushi et al.

International journal of mechanical sciences, 2018, 140, 486-492

Permalink : https://hdl.handle.net/2115/70914

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/70914
タイトル	Non-contact and non-destructive Lamb wave generation using laser-induced plasma shock wave
著者	Hosoya, Naoki ; Yoshinaga, Atsushi ; Kanda, Atsushi ; Kajiwara, Itsuro
著者名 Hosoya, Naoki
著者名 Yoshinaga, Atsushi
著者名 Kanda, Atsushi
e-Rad_Researcher 60224416 著者名 Kajiwara, Itsuro
言語	英語
キーワード	Lamb wave
	Non-destructive evaluation
	Laser-induced plasma
	Shock wave
	Acoustic wave
	Non-contact excitation
発行日	2018-05
出版者	Elsevier
収録物名	International journal of mechanical sciences
巻(号)	140
ページ	486-492
抄録	This paper proposes a non-contact and non-destructive method to generate Lamb waves against a target structure using the impulse excitation force generated by laser-induced plasma (LIP). When a high power pulse laser is irradiated in air and its laser fluence exceeds 10(15) W/m(2), a plasma is formed. While the plasma in air expands in high speed, shock waves on the spherical surface are generated and these shock waves become the impulse excitation force against a target structure, resulting in the non-contact and non-destructive approach. A 2024 aluminum alloy plate is used as the test piece in the experiment, and the dynamic characteristics of the Lamb waves generated from LIP shock waves are measured. Phase velocity and group velocity of generated Lamb waves were compared to the calculated values from Rayleigh-Lamb frequency equations and we found that maximum error was 5% and its frequency component included at least 400 kHz. Further, we investigated the relationship between the distance from the LIP shock wave-generating location to a test piece and the dynamic characteristics of the generated Lamb waves. This method can control the amplitude and the frequency components of generated Lamb waves by changing this distance.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
PISSN	0020-7403
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1016/j.ijmecsci.2018.03.023