Defect imaging for plate-like structures using diffuse acoustic wave generated by modulated laser

Autor:	Takahiro Hayashi, Shogo Nakao
Rok vydání:	2019
Předmět:	Diffraction Materials science business.industry Resonance Acoustic wave Laser law.invention Optics law Bending stiffness Flexural vibration Spurious relationship business Energy (signal processing)
Zdroj:	AIP Conference Proceedings.
ISSN:	0094-243X
DOI:	10.1063/1.5099769
Popis:	45TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLUME 38, 15–19 July 2018, Vermont, USA Takahiro Hayashi and Shogo Nakao, "Defect imaging for plate-like structures using diffuse acoustic wave generated by modulated laser", AIP Conference Proceedings 2102, 050003 (2019) https://doi.org/10.1063/1.5099769 Authors have studied defect imaging technique for plate-like structures, which creates an image beyond diffraction limit and can be applied to a plate-like structure with a complex shape because this technique just uses variations of flexural vibration energy due to the differences in nominal bending stiffness at laser spots. However, this technique generates spurious images caused by the resonance as well as defect images. The current study described how the spurious images can be reduced using diffuse acoustic wave, and then showed that images of defects and adhesive regions can be obtained appropriately even in such complex structures as a flat plate with a complex shape, a curved plate, and a branch pipe.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8033f28ccb2b3f9ada5fc45b3e5ac662 https://doi.org/10.1063/1.5099769 Zobrazit plný text záznamu