Shoukroun, D;
Massimi, L;
Endrizzi, M;
Nesbitt, A;
Bate, D;
Fromme, P;
Olivo, A;
(2023)
Quantification of porosity in composite plates using planar X-ray phase contrast imaging.
NDT&E international
, Article 102935. 10.1016/j.ndteint.2023.102935.
(In press).
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Abstract
The application of planar Edge-Illumination X-ray Phase-Contrast imaging (EI-XPCi) for the non-destructive quantification of porosity in carbon fiber reinforced polymer (CFRP) specimens, a significant concern in aerospace applications, was investigated. The method enables fast, planar (2D) scans providing access to large samples. A set of woven CFRP plates with porosity content ranging from 0.7% to 10.7% was examined. In addition to standard X-ray attenuation, EI-XPCi provides differential phase and dark-field signals, sensitive to inhomogeneities and interfaces at scales above and below the system spatial resolution, respectively. The correlation with the porosity content from matrix digestion obtained from the dark-field signal was comparable to that from ultrasonic attenuation. The novel analysis of the standard deviation of differential phase (STDP), sensitive to inhomogeneities above the system resolution (approximately 12 μm), resulted in a very high correlation (R2 = 0.995) with the matrix digestion porosity content, outperforming ultrasonic attenuation measurements.
| Type: | Article |
|---|---|
| Title: | Quantification of porosity in composite plates using planar X-ray phase contrast imaging |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ndteint.2023.102935 |
| Publisher version: | https://doi.org/10.1016/j.ndteint.2023.102935 |
| Language: | English |
| Additional information: | This is an Open Access article published under a Creative Commons Attribution 4.0 International (CC BY 4.0) Licence (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Composites; CFRP; Porosity; Voids; Radiography; XPCi; Ultrasound |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10174815 |
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