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Acoustic emission multiplets as early warnings of fatigue failure in metallic materials

Fatigue, i.e. the failure of mechanical structures under cycling loading, remains a considerable technological challenge as it occurs unexpectedly when the structure is operating apparently in a safe and steady state regime, without external signs of mechanical deterioration. Here we report for the...

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Detalles Bibliográficos
Autores principales: Deschanel, S., Ben Rhouma, W., Weiss, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5654477/
https://www.ncbi.nlm.nih.gov/pubmed/29057885
http://dx.doi.org/10.1038/s41598-017-13226-1
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author Deschanel, S.
Ben Rhouma, W.
Weiss, J.
author_facet Deschanel, S.
Ben Rhouma, W.
Weiss, J.
author_sort Deschanel, S.
collection PubMed
description Fatigue, i.e. the failure of mechanical structures under cycling loading, remains a considerable technological challenge as it occurs unexpectedly when the structure is operating apparently in a safe and steady state regime, without external signs of mechanical deterioration. Here we report for the first time, in different metallic materials, the detection of acoustic emissions specific of fatigue crack growth. These so-called acoustic multiplets are characterized by nearly identical waveforms, signature of a unique source, are repeatedly triggered over many successive loading cycles at the same stress level, and originate from a single location. They mark the slow, incremental propagation of a fatigue crack at each cycle, or the rubbing along its faces. Being specific to fatigue cracking, they can be used as early warnings of crack propagation, which will ultimately lead to structural failure. Their detection and characterization thus open the way towards a new, reliable monitoring of the onset of fatigue cracking during mechanical tests or within structures in service.
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spelling pubmed-56544772017-11-08 Acoustic emission multiplets as early warnings of fatigue failure in metallic materials Deschanel, S. Ben Rhouma, W. Weiss, J. Sci Rep Article Fatigue, i.e. the failure of mechanical structures under cycling loading, remains a considerable technological challenge as it occurs unexpectedly when the structure is operating apparently in a safe and steady state regime, without external signs of mechanical deterioration. Here we report for the first time, in different metallic materials, the detection of acoustic emissions specific of fatigue crack growth. These so-called acoustic multiplets are characterized by nearly identical waveforms, signature of a unique source, are repeatedly triggered over many successive loading cycles at the same stress level, and originate from a single location. They mark the slow, incremental propagation of a fatigue crack at each cycle, or the rubbing along its faces. Being specific to fatigue cracking, they can be used as early warnings of crack propagation, which will ultimately lead to structural failure. Their detection and characterization thus open the way towards a new, reliable monitoring of the onset of fatigue cracking during mechanical tests or within structures in service. Nature Publishing Group UK 2017-10-20 /pmc/articles/PMC5654477/ /pubmed/29057885 http://dx.doi.org/10.1038/s41598-017-13226-1 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Deschanel, S.
Ben Rhouma, W.
Weiss, J.
Acoustic emission multiplets as early warnings of fatigue failure in metallic materials
title Acoustic emission multiplets as early warnings of fatigue failure in metallic materials
title_full Acoustic emission multiplets as early warnings of fatigue failure in metallic materials
title_fullStr Acoustic emission multiplets as early warnings of fatigue failure in metallic materials
title_full_unstemmed Acoustic emission multiplets as early warnings of fatigue failure in metallic materials
title_short Acoustic emission multiplets as early warnings of fatigue failure in metallic materials
title_sort acoustic emission multiplets as early warnings of fatigue failure in metallic materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5654477/
https://www.ncbi.nlm.nih.gov/pubmed/29057885
http://dx.doi.org/10.1038/s41598-017-13226-1
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