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A Sensitive Frequency Range Method Based on Laser Ultrasounds for Micro-Crack Depth Determination

Li, Haiyang ; Jiang, Wenxin ; Deng, Jin ; Yu, Ruien ; Pan, Qianghua

Sensors (Basel, Switzerland), 2022-09, Vol.22 (19), p.7221 [Periódico revisado por pares]

Basel: MDPI AG

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Título:
A Sensitive Frequency Range Method Based on Laser Ultrasounds for Micro-Crack Depth Determination
Autor: Li, Haiyang ; Jiang, Wenxin ; Deng, Jin ; Yu, Ruien ; Pan, Qianghua
Assuntos: Acoustics ; Alloys ; Analysis ; Cracks ; Evaluation ; Frequency domain analysis ; Frequency ranges ; laser ultrasonics ; Lasers ; Low pass filters ; Methods ; Microcracks ; Parameter sensitivity ; Rayleigh wave ; Rayleigh waves ; sum of transmission coefficients ; surface crack ; Surface cracks ; Ultrasonic imaging ; Ultrasonic methods
É parte de: Sensors (Basel, Switzerland), 2022-09, Vol.22 (19), p.7221
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The laser ultrasonic method using the characteristics of transmitted Rayleigh waves in the frequency domain to determine micro-crack depth is proposed. A low-pass filter model based on the interaction between Rayleigh waves and surface cracks is built and shows that the stop band, called the sensitive frequency range, is sensitive to the depth of surface cracks. The sum of transmission coefficients in the sensitive frequency range is defined as an evaluated parameter to determine crack depth. Moreover, the effects of the sensitive frequency range and measured distance on the evaluated results are analyzed by the finite-element method to validate the robustness of this depth-evaluating method. The estimated results of surface cracks with depths ranging from 0.08 mm to ~0.5 mm on the FEM models and aluminum-alloy samples demonstrate that the laser ultrasounds using the characteristics of Rayleigh waves in the frequency domain do work for quantitative crack depth.
Editor: Basel: MDPI AG
Idioma: Inglês

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A Sensitive Frequency Range Method Based on Laser Ultrasounds for Micro-Crack Depth Determination

Li, Haiyang ; Jiang, Wenxin ; Deng, Jin ; Yu, Ruien ; Pan, Qianghua

Basel: MDPI AG

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