Opto/Photoacoustic for Imaging, Material Characterization and Nondestructive Evaluation

A special issue of Acoustics (ISSN 2624-599X).

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 3059

Special Issue Editor


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Guest Editor
Department of Manufacturing Engineering, Georgia Southern University, Statesboro, GA 30460, USA
Interests: ultrasound; acoustic, sound; material testing; acoustic emission; distributed acoustic sensing; noise; vibration; nonlinear; numerical; piezo
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Special Issue Information

Dear Colleagues,

The Special Issue of Acoustics on “Opto/Photoacoustics for Imaging, Material Characterization and Nondestructive Evaluation” focuses on the broad topic of “Opto/Photoacoustics” and includes novel research on the use of Opto/Photoacoustic methods, instrumentation and techniques for imaging, material characterization and nondestructive testing and evaluation.

Theoretical and empirical articles on the application of novel Opto/Photoacoustic techniques in characterization, simulation, signal/data processing, application of artificial intelligence (AI), machine learning (ML) and calibration with applications to for imaging, material characterization and nondestructive testing and evaluation are welcome.

Contributions focusing on high-speed three-dimensional imaging, multispectral optoacoustic tomography (MSOT) and in situ process monitoring applications in today’s complex world, novel measurement techniques, and other types of in situ/ex situ monitoring and imaging are encouraged.

Dr. Hossein Taheri
Guest Editor

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Keywords

  • optoacoustic
  • photoacoustic
  • imaging
  • in situ Monitoring

Published Papers (1 paper)

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Research

17 pages, 11741 KiB  
Article
Enhancement of Guided Wave Detection and Measurement in Buried Layers of Multilayered Structures Using a New Design of V(z) Acoustic Transducers
by Michaël Lematre and Marc Lethiecq
Acoustics 2022, 4(4), 996-1012; https://doi.org/10.3390/acoustics4040061 - 15 Nov 2022
Cited by 1 | Viewed by 2137
Abstract
This paper presents the possibility of enhancement of the generation and detection of poorly energetic acoustic-guided waves in multilayered structures using a new design for a V(z) transducer. By defining a modified V(z) transducer composed of segmented piezoelectric elements, [...] Read more.
This paper presents the possibility of enhancement of the generation and detection of poorly energetic acoustic-guided waves in multilayered structures using a new design for a V(z) transducer. By defining a modified V(z) transducer composed of segmented piezoelectric elements, the acoustical energy can be directed towards specific angles in such a way as to generate guided waves that are poorly energetic. By comparing the results using this new design to those obtained with a classical V(z) transducer, it is shown that the generation and detection of such waves is greatly improved, especially for poorly energetic waves that belong to a buried layer in a multilayered structure. This is especially seen on the components of the spectra of V(z). The modeling of the modified V(z) signature for a multi-element focused transducer is widely detailed first. Then, in order to illustrate the advantages of our proposed method, a three-layer structure (aluminum/epoxy/steel) is discussed. The interest of this method for the characterization of elastic properties of “buried” layers through specific guided waves that are detected with great difficulty—or even not at all—with a classical V(z) transducer is demonstrated, especially for the A0 and S0 modes corresponding to the steel layer inside the three-layer structure. In this study, we also develop a specific tracking method for particular guided waves possessing large phase velocity variations over the considered frequency range, as is the case for the S0 mode of the steel sub-layer. Full article
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