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The Location Monitoring of Fatigue Crack Damage by Using the Spectral Area Extracted from FBG Spectra

In this paper, a new damage feature, spectral area, was extracted to effectively detect crack location by studying the deformation mechanism of fiber Bragg grating (FBG) reflection spectra. In order to verify the robustness and reliability of spectral area to detect crack location, the following wor...

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Detalles Bibliográficos
Autores principales: Zhao, Yan, Hu, DianYin, Zhang, Meng, Dai, Wei, Zhang, Weifang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219326/
https://www.ncbi.nlm.nih.gov/pubmed/32331376
http://dx.doi.org/10.3390/s20082375
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author Zhao, Yan
Hu, DianYin
Zhang, Meng
Dai, Wei
Zhang, Weifang
author_facet Zhao, Yan
Hu, DianYin
Zhang, Meng
Dai, Wei
Zhang, Weifang
author_sort Zhao, Yan
collection PubMed
description In this paper, a new damage feature, spectral area, was extracted to effectively detect crack location by studying the deformation mechanism of fiber Bragg grating (FBG) reflection spectra. In order to verify the robustness and reliability of spectral area to detect crack location, the following work was carried out: Firstly, the strain information was extracted by extended finite element method (XFEM) with fatigue crack propagation. The transmission matrix method (TMM) was used to simulate FBG reflection spectra using numerical results. Secondly, the fatigue crack growth monitoring experiment based on FBG sensors was carried out, and the digital image correlation (DIC) method was used to measure the strain values at the placement of FBG sensors with crack propagation. The temperature characteristic test of FBG was carried out to investigate the influence of temperature variation on the spectral area. The results presented that the spectral area was insensitive to temperature variation and experimental noise, and was greatly sensitive to the complex non-uniform strain field cause by crack damage. Moreover, compared with the 5 mm FBG sensor, the 10 mm FBG sensor showed a larger critical detection range for crack damage. Therefore, the spectral area can be used as a reliable damage feature to detect the crack location quantitatively based on the simulated and experimental results.
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spelling pubmed-72193262020-05-22 The Location Monitoring of Fatigue Crack Damage by Using the Spectral Area Extracted from FBG Spectra Zhao, Yan Hu, DianYin Zhang, Meng Dai, Wei Zhang, Weifang Sensors (Basel) Article In this paper, a new damage feature, spectral area, was extracted to effectively detect crack location by studying the deformation mechanism of fiber Bragg grating (FBG) reflection spectra. In order to verify the robustness and reliability of spectral area to detect crack location, the following work was carried out: Firstly, the strain information was extracted by extended finite element method (XFEM) with fatigue crack propagation. The transmission matrix method (TMM) was used to simulate FBG reflection spectra using numerical results. Secondly, the fatigue crack growth monitoring experiment based on FBG sensors was carried out, and the digital image correlation (DIC) method was used to measure the strain values at the placement of FBG sensors with crack propagation. The temperature characteristic test of FBG was carried out to investigate the influence of temperature variation on the spectral area. The results presented that the spectral area was insensitive to temperature variation and experimental noise, and was greatly sensitive to the complex non-uniform strain field cause by crack damage. Moreover, compared with the 5 mm FBG sensor, the 10 mm FBG sensor showed a larger critical detection range for crack damage. Therefore, the spectral area can be used as a reliable damage feature to detect the crack location quantitatively based on the simulated and experimental results. MDPI 2020-04-22 /pmc/articles/PMC7219326/ /pubmed/32331376 http://dx.doi.org/10.3390/s20082375 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Yan
Hu, DianYin
Zhang, Meng
Dai, Wei
Zhang, Weifang
The Location Monitoring of Fatigue Crack Damage by Using the Spectral Area Extracted from FBG Spectra
title The Location Monitoring of Fatigue Crack Damage by Using the Spectral Area Extracted from FBG Spectra
title_full The Location Monitoring of Fatigue Crack Damage by Using the Spectral Area Extracted from FBG Spectra
title_fullStr The Location Monitoring of Fatigue Crack Damage by Using the Spectral Area Extracted from FBG Spectra
title_full_unstemmed The Location Monitoring of Fatigue Crack Damage by Using the Spectral Area Extracted from FBG Spectra
title_short The Location Monitoring of Fatigue Crack Damage by Using the Spectral Area Extracted from FBG Spectra
title_sort location monitoring of fatigue crack damage by using the spectral area extracted from fbg spectra
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219326/
https://www.ncbi.nlm.nih.gov/pubmed/32331376
http://dx.doi.org/10.3390/s20082375
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