Alasdair Crawford
Analysis of acoustic emission propagation in metal-to-metal adhesively-bonded joints.
Crawford, Alasdair; Droubi, Mohamad Ghazi; Faisal, Nadimul Haque
Authors
Dr Ghazi Droubi m.g.droubi@rgu.ac.uk
Principal Lecturer
Professor Nadimul Faisal N.H.Faisal@rgu.ac.uk
Professor
Abstract
Acoustic emission (AE) monitoring shows promise as one of the most effective methods for condition monitoring of adhesively-bonded joints. Previous research has demonstrated its ability to detect, locate and classify adhesive joint failure, though in these studies little attention appears to have been paid to the differences in AE wave propagation through the bonded and un-bonded sections of the specimens tested, or to the effects of the wave modes excited or the propagation distances. This paper details an experimental study conducted on large aluminium sheet specimens to identify the effects of the presence of an adhesive layer on AE wave propagation. Three specimens are considered; a single aluminium sheet, two aluminium sheets placed together without adhesive, and an adhesively-bonded specimen. A pencil lead break (PLB) is used as a simulated AE source, and is applied to the three specimens at varying propagation distances and orientations. The acquired signals are processed using wavelet-transforms to explore time-frequency features, and compared with modified group-velocity curves based on the Rayleigh-Lamb equations to allow identification of wave-modes and edge-reflections. The effects of propagation distance and source orientation are investigated while comparison is made between the three specimens. It is concluded that while the wave propagation modes can be approximated as being constant throughout all three specimens, there is a significant change in the received waveforms due to the attenuation of high-frequency components exhibited by the bonded specimen. These findings may be utilised to provide a deeper understanding of acquired AE data, improving the current abilities to identify, locate and characterise damage mechanisms occurring within adhesive joints, ultimately improving safety in the use of adhesive bonding for critical applications.
Citation
CRAWFORD, A., DROUBI, M.G. and FAISAL, N.H. 2018. Analysis of acoustic emission propagation in metal-to-metal adhesively-bonded joints. Journal of nondestructive evaluation [online], 37(2), article number 33. Available from: https://doi.org/10.1007/s10921-018-0488-y
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 20, 2018 |
Online Publication Date | May 4, 2018 |
Publication Date | Jun 30, 2018 |
Deposit Date | May 11, 2018 |
Publicly Available Date | May 11, 2018 |
Journal | Journal of nondestructive evaluation |
Print ISSN | 0195-9298 |
Electronic ISSN | 1573-4862 |
Publisher | Springer |
Peer Reviewed | Peer Reviewed |
Volume | 37 |
Issue | 2 |
Article Number | 33 |
DOI | https://doi.org/10.1007/s10921-018-0488-y |
Keywords | Adhesive joints; Acoustic emission; Wave propagation; Wavelet transform; Signal processing; Pencil lead break (PLB)test |
Public URL | http://hdl.handle.net/10059/2915 |
Contract Date | May 11, 2018 |
Files
CRAWFORD 2018 Analysis of acoustic emission
(5.8 Mb)
PDF
Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
You might also like
The impact of ice formation on vertical axis wind turbine performance and aerodynamics.
(2023)
Journal Article
Data reduction strategies.
(2021)
Book Chapter
Downloadable Citations
About OpenAIR@RGU
Administrator e-mail: publications@rgu.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search