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A comparison of different approaches for imaging cracks in composites by X-ray microtomography

X-ray computed tomography (CT) has emerged as a key imaging tool in the characterization of materials, allowing three-dimensional visualization of an object non-destructively as well as enabling the monitoring of damage accumulation over time through time-lapse imaging. However, small defects and cr...

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Detalles Bibliográficos
Autores principales: Yu, B., Bradley, R. S., Soutis, C., Withers, P. J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4901256/
https://www.ncbi.nlm.nih.gov/pubmed/27242291
http://dx.doi.org/10.1098/rsta.2016.0037
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author Yu, B.
Bradley, R. S.
Soutis, C.
Withers, P. J.
author_facet Yu, B.
Bradley, R. S.
Soutis, C.
Withers, P. J.
author_sort Yu, B.
collection PubMed
description X-ray computed tomography (CT) has emerged as a key imaging tool in the characterization of materials, allowing three-dimensional visualization of an object non-destructively as well as enabling the monitoring of damage accumulation over time through time-lapse imaging. However, small defects and cracks can be difficult to detect, particularly in composite materials where low-contrast, plate-like geometries of large area can compromise detectability. Here, we investigate a number of strategies aimed at increasing the capability of X-ray CT to detect composite damage such as transverse ply cracking and delamination, looking specifically at a woven glass fibre-reinforced three-dimensional composite. High-resolution region of interest (ROI) scanning, in situ loading, phase contrast and contrast agents are examined systematically as strategies for improving the defect detectability. Spatial resolution, contrast, signal-to-noise ratio, full width at half maximum, user friendliness and measurement time are all considered. Taken together, the results suggest that high-resolution ROI scanning combined with the increased contrast resulting from staining give the highest defect detectability. This article is part of the themed issue ‘Multiscale modelling of the structural integrity of composite materials’.
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spelling pubmed-49012562016-07-13 A comparison of different approaches for imaging cracks in composites by X-ray microtomography Yu, B. Bradley, R. S. Soutis, C. Withers, P. J. Philos Trans A Math Phys Eng Sci Articles X-ray computed tomography (CT) has emerged as a key imaging tool in the characterization of materials, allowing three-dimensional visualization of an object non-destructively as well as enabling the monitoring of damage accumulation over time through time-lapse imaging. However, small defects and cracks can be difficult to detect, particularly in composite materials where low-contrast, plate-like geometries of large area can compromise detectability. Here, we investigate a number of strategies aimed at increasing the capability of X-ray CT to detect composite damage such as transverse ply cracking and delamination, looking specifically at a woven glass fibre-reinforced three-dimensional composite. High-resolution region of interest (ROI) scanning, in situ loading, phase contrast and contrast agents are examined systematically as strategies for improving the defect detectability. Spatial resolution, contrast, signal-to-noise ratio, full width at half maximum, user friendliness and measurement time are all considered. Taken together, the results suggest that high-resolution ROI scanning combined with the increased contrast resulting from staining give the highest defect detectability. This article is part of the themed issue ‘Multiscale modelling of the structural integrity of composite materials’. The Royal Society Publishing 2016-07-13 /pmc/articles/PMC4901256/ /pubmed/27242291 http://dx.doi.org/10.1098/rsta.2016.0037 Text en © 2016 The Authors http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Articles
Yu, B.
Bradley, R. S.
Soutis, C.
Withers, P. J.
A comparison of different approaches for imaging cracks in composites by X-ray microtomography
title A comparison of different approaches for imaging cracks in composites by X-ray microtomography
title_full A comparison of different approaches for imaging cracks in composites by X-ray microtomography
title_fullStr A comparison of different approaches for imaging cracks in composites by X-ray microtomography
title_full_unstemmed A comparison of different approaches for imaging cracks in composites by X-ray microtomography
title_short A comparison of different approaches for imaging cracks in composites by X-ray microtomography
title_sort comparison of different approaches for imaging cracks in composites by x-ray microtomography
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4901256/
https://www.ncbi.nlm.nih.gov/pubmed/27242291
http://dx.doi.org/10.1098/rsta.2016.0037
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