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A comparison of different approaches for imaging cracks in composites by X-ray microtomography
File | Description | Size | Format | |
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20160037.full.pdf | Published version | 2.58 MB | Adobe PDF | View/Open |
Title: | A comparison of different approaches for imaging cracks in composites by X-ray microtomography |
Authors: | Yu, B Bradley, RS Soutis, C Withers, PJ |
Item Type: | Journal Article |
Abstract: | 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. |
Issue Date: | 30-May-2016 |
Date of Acceptance: | 7-Mar-2016 |
URI: | http://hdl.handle.net/10044/1/40363 |
DOI: | http://dx.doi.org/10.1098/rsta.2016.0037 |
ISSN: | 1364-503X |
Publisher: | The Royal Society |
Journal / Book Title: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
Volume: | 374 |
Issue: | 2071 |
Copyright Statement: | © 2016 The Authors. 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. |
Keywords: | General Science & Technology MD Multidisciplinary |
Publication Status: | Published |
Article Number: | 20160037 |
Appears in Collections: | Aeronautics Faculty of Engineering |