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Symmetry
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Symmetry/Asymmetry of Ultrasonic Guided Waves in Structural Health Monitoring and...
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Symmetry/Asymmetry of Ultrasonic Guided Waves in Structural Health Monitoring and Non-destructive Testing

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: 30 April 2024 | Viewed by 1445

Special Issue Editors

Dr. Lina Draudviliene

E-Mail Website1 Website2
Guest Editor
Ultrasound Research Institute, Kaunas University of Technology, K. Baršausko St. 59, LT-51423 Kaunas, Lithuania
Interests: ultrasonic guided waves measurements; non-destructive testing; structural health monitoring; material characterization; guided waves applications for testing of the composite materials; signal processing
Dr. Renaldas Raišutis

E-Mail Website
Guest Editor
Ultrasound Research Institute, Kaunas University of Technology, K. Barsausko st. 59, LT-51423 Kaunas, Lithuania
Interests: power systems; renewables; uncertainty analysis; digital signal processing; smart materials
Special Issues, Collections and Topics in MDPI journals
Dr. Serge Dos Santos

E-Mail Website
Guest Editor
Department of Industrial Systems, INSA Centre Val de Loire (INSA CVL), 3 Rue de la Chocolaterie, CEDEX, 41034 Blois, France
Interests: ultrasound; nonlinear acoustics; signal processing; nondestructive testing; nonlinear time reversal; NDE4.0; TR-NEWS

Special Issue Information

Dear Colleagues,

Nowadays, the ultrasonic guided waves (UGW) method is an attractive and well-known technique for non-destructive testing (NDT) and structural health monitoring (SHM) tasks. The utilization of these waves for ensuring the compliance of objects with safety requirements by detecting structural changes during manufacturing and performing monitoring during the service life is an effective tool for environmental sustainability. Lamb waves, one type of UGW generated in plates and shell components, represent a promising solution for the failure prevention of various types of objects in future. There are two groups of dispersive modes of Lamb waves: symmetric and anti-symmetric. These dispersive modes, which propagate along the object under investigation, are highly sensitive to the properties of the material, sensitive to cracks at different depths, and can propagate over a relatively long distance (up to 100 m). Therefore, using the registered signals of Lamb waves, the early degradation of materials and the evaluation and detection of damage inside the structure are obtained faster and more sensitively. Since various types of objects can be inspected for internal defects using symmetric and anti-symmetric modes of Lamb waves to ensure that they meet safety and economical requirements, the utilization of such waves therefore plays a huge role in ensuring safety and environmental sustainability. However, irrespective of all of the good features associated with Lamb waves, the testing of objects is still a quite complex and challenging task due to the dispersion phenomenon, with the infinite number of dispersive symmetric and anti-symmetric modes. This Special Issue aims to present advances in signal processing relating to the UGW technique, including (but not limited to) the novel developments regarding Lamb wave-related methods, time reversal-based nonlinear elastic wave spectroscopy methods, the reliability evaluation of methods, and applications of non-destructive testing (NDT) and structural health monitoring (SHM).

Dr. Lina Draudviliene
Dr. Renaldas Raišutis
Dr. Serge Dos Santos
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • signal processing methods
  • symmetric and asymmetric modes
  • phase and group velocity dispersion curves
  • reliability evaluation of methods
  • uncertainties
  • guided-wave modelling and propagation
  • multimodal guided-wave representation
  • time reversal-based imaging
  • coded excitations
  • non-destructive testing (NDT)
  • structure health monitoring (SHM)
  • on-site and in-service structural diagnosis
  • damage diagnosis
  • damage identification and evaluation
  • prognosis

Published Papers (1 paper)

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Research

13 pages, 3773 KiB  
Article
Estimation of Lamb Wave Anti-Symmetric Mode Phase Velocity in Various Dispersion Ranges Using Only Two Signals
by Lina Draudvilienė and Renaldas Raišutis
Symmetry 2023, 15(6), 1236; https://doi.org/10.3390/sym15061236 - 09 Jun 2023
Cited by 1 | Viewed by 899
Abstract
The application of non-stationary Lamb wave signals is a promising tool in various industrial applications where information about changes inside a structure is required. Phase velocity is one of the Lamb wave parameters that can be used for inhomogeneities detection. The possibility of [...] Read more.
The application of non-stationary Lamb wave signals is a promising tool in various industrial applications where information about changes inside a structure is required. Phase velocity is one of the Lamb wave parameters that can be used for inhomogeneities detection. The possibility of reconstructing the segment of the phase velocity in a strong dispersion range using only two signals is proposed. The theoretical study is performed using signals of the A0 mode propagating in an aluminium plate at a frequency of 150 kHz, 300 kHz, 500 kHz and 900 kHz. The experiment was carried out at a value of 300 kHz. The studies conducted indicated that the maximum distance between two signals, at which the time-of-flight can be measured between the same phase points, is the main parameter for the two signals technique application. Theoretical and experimental studies were performed, and the mean relative error was calculated by comparing the obtained results with those calculated via the SAFE method. In the theoretical study, the mean relative error of 0.33% was obtained at 150 kHz, 0.22% at 300 kHz, 0.23% at 500 kHz and 0.11% at 900 kHz. The calculated mean relative errors δcph=0.91% and δcph=1.36% were obtained at different distances in the experimental study. The results obtained show that the estimation of the phase velocity in dispersion ranges using only two received signals was a useful tool that saved time and effort. Full article
(This article belongs to the Special Issue Symmetry/Asymmetry of Ultrasonic Guided Waves in Structural Health Monitoring and Non-destructive Testing)
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