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Acoustic Emission Technology and Its Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: closed (10 January 2025) | Viewed by 2480

Special Issue Editors

Faculty of Mechanical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
Interests: acoustic emission; composites; material characterization; aerospace applications; machine learning; deep learning
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Guest Editor
The Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, University of Iceland, 102 Reykjavik, Iceland
Interests: acoustic emission; acoustics; spatial audio; haptics; ndt; energy efficiency; waste energy

Special Issue Information

Dear Colleagues,

Acoustic emission testing has firmly established itself as a crucial component of non-destructive testing (NDT). It encompasses a diverse array of sophisticated techniques designed to not only observe natural acoustic emission processes but also to extract valuable practical insights. The domain of acoustic emission continues to expand as its applications are increasingly recognized and realized. This Special Issue aspires to examine the state-of-the-art acoustic emission technology and its applications while offering a glimpse into the exciting future directions that this field is poised to take.

This Special Issue aims to showcase the latest innovations and breakthroughs in the field. It will be dedicated to new perspectives on topics ranging from structural health monitoring in aerospace and civil engineering to non-destructive testing in manufacturing. Also highlighting advancements in sensor technology, signal processing, and data analytics, this Special Issue aims to bridge the gap between theory and real-world implementation.

Dr. Tomaz Kek
Dr. Rúnar Unnþórsson
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.

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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

  • structural health monitoring (SHM)
  • aerospace applications
  • material characterization
  • additive manufacturing
  • condition-based monitoring
  • miniaturization and sensor technology
  • data fusion and analytics
  • artificial intelligence, machine learning and deep learning

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Published Papers (2 papers)

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Research

18 pages, 4735 KiB  
Article
Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation Tests
by Felipe Romero, Franco Méndez, Javiera González, Víctor Tuninetti, Carlos Medina, Meylí Valin, José Valin, Alexis Salas and Cristián Vicuña
Appl. Sci. 2025, 15(8), 4517; https://doi.org/10.3390/app15084517 - 19 Apr 2025
Viewed by 180
Abstract
Carbon fiber-reinforced polymers (CFRP) are widely used composite materials in structural applications, where their mechanical performance is significantly influenced by interfacial shear strength (IFSS). The single fiber fragmentation test (SFFT) is a common technique for characterizing IFSS, but its reliance on optical microscopy [...] Read more.
Carbon fiber-reinforced polymers (CFRP) are widely used composite materials in structural applications, where their mechanical performance is significantly influenced by interfacial shear strength (IFSS). The single fiber fragmentation test (SFFT) is a common technique for characterizing IFSS, but its reliance on optical microscopy makes it time-consuming and impractical for opaque matrices. This study presents an alternative methodology based on acoustic emission (AE) analysis, enabling the estimation of fragment lengths through statistical modeling. The AE technique captures the energy released during fiber fragmentation, represented as AE bursts, whose accurate detection is crucial. A signal-processing approach based on progressive simplification enhances burst detection. To refine the estimation of fragment lengths, a gamma distribution is fitted to experimental data, accounting for observed asymmetry in optical measurements. Results indicate that this approach achieves an IFSS determination error of 14.16% at a 95% confidence level. This study demonstrates the feasibility of using AE for IFSS characterization in SFFT and contributes to future research on AE applications in composite materials. Full article
(This article belongs to the Special Issue Acoustic Emission Technology and Its Applications)
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13 pages, 6250 KiB  
Article
Research on Acoustic Emission Characteristics and Crack Evolution during Rock Failure under Tensile and Tensile- and Compressive-Shear Stress States
by Yifan Xu, Jie Hu, Peng He, Gang Wang and Haolan Pan
Appl. Sci. 2024, 14(2), 545; https://doi.org/10.3390/app14020545 - 8 Jan 2024
Cited by 2 | Viewed by 1745
Abstract
Tensile, compressive-shear, and tensile-shear failure are three typical failure modes of rock- and lining-support structural materials in underground engineering. Comparative studies of the acoustic emission (AE) evolution characteristics of specimens of the same shape and size under different stress states are of great [...] Read more.
Tensile, compressive-shear, and tensile-shear failure are three typical failure modes of rock- and lining-support structural materials in underground engineering. Comparative studies of the acoustic emission (AE) evolution characteristics of specimens of the same shape and size under different stress states are of great significance in determining universal disaster warning guidelines. Based on a self-developed multi-functional test system, direct tensile, compressive-shear, and tensile-shear tests were conducted on intact and jointed rock-like specimens, comparing AE amplitude and peak frequency parameters under different failure modes from the perspectives of crack scale and crack type evolution. All failure tests were monitored with microcrack propagation at an early stage until ultimate rupture occurred at the peak-load moment. As a result, the “quiet-period” could only be observed from the compressive-shear test. The AE signals distributed in three bands can be used as an indicator of failure identifications. Tensile and shear cracks can be identified by strong and weak amplitudes of low- and high-frequency signals. These results enhance the knowledge of the failure modes of rock mechanics for more applications in monitoring disasters in rock engineering. Full article
(This article belongs to the Special Issue Acoustic Emission Technology and Its Applications)
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