Contrast enhancement in visualisation of woven composite tow architecture using a MicroCT Scanner. Part 1: Fabric coating and resin additives |
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| Authors: | Luke P. Djukic Israel Herszberg William R. Walsh Gregory A. Schoeppner B. Gangadhara Prusty Don W. Kelly |
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| Affiliation: | 1. The University of New South Wales, School of Mechanical and Manufacturing Engineering, Sydney, NSW 2052, Australia;2. Cooperative Research Centre for Advanced Composite Structures Ltd., 506 Lorimer Street, Fishermans Bend, Vic. 3207, Australia;3. The University of New South Wales, Surgical and Orthopaedic Research Laboratories, Division of Surgery, NSW 2052, Australia;4. Air Force Research Laboratories, Wright-Patterson Air Force Base, Dayton, OH, USA;1. The Centre for Design, Manufacturing and Materials, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow 121205, Russia;2. Department of Materials Engineering, KU Leuven Kasteelpark, Arenberg 44, 3001 Leuven, Belgium;3. Toyota Motor Europe, Material Engineering, Hoge Wei, 33, 1930 Zaventem, Belgium;1. Department of Wind Energy, Composites and Materials Mechanics, Technical University of Denmark, DTU Risø Campus, 4000, Roskilde, Denmark;2. LM Wind Power Blades, Composite Mechanics, Jupitervej 6, 6000, Kolding, Denmark;3. Manchester X-ray Imaging Facility, School of Materials, University of Manchester, Manchester, M13 9PL, United Kingdom;1. Advanced Composites Centre for Innovation and Science (ACCIS), University of Bristol, University Walk, Bristol BS8 1TR, UK;2. Polymer Composites Research Group, University of Nottingham, University Park, Nottingham NG7 2RD, UK;1. Université de Lyon, LaMCoS UMR 5259, INSA-Lyon, 27 av Jean Capelle, F-69621 Villeurbanne, France;2. Université de Lyon, MATEIS UMR 5510, INSA-Lyon, 25 av Jean Capelle, F-69621 Villeurbanne, France;3. SNECMA, Site de Villaroche, Rond Point René Ravaud - Réau, F-77550 Moissy-Cramayel, France |
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| Abstract: | MicroCT scanning is a non-destructive inspection method which was used to visualise tow architecture in woven composites with the ultimate goal of three-dimensional model generation. This has been achieved in the past for glass fabric composites, but is problematic when applied to carbon fabrics. Using X-rays, it is difficult to discriminate between elements of the composite, particularly the region between co-aligned neighbouring tows. This presents difficulty when viewing such composites using X-ray MicroCT scanning. Additives were used to enhance contrast during scanning. The most successful techniques were coating of fabrics with gold, copper, and an iodine contrast agent. Resin particle additive techniques were also trialled, with limited success. Good visualisations of glass fabrics were possible without contrast enhancement. Three-dimensional reconstructions of interior tow architectures were then made from the scans of contrast enhanced specimens. This research can be viewed as a starting point in developing methods for generating contrast between neighbouring tows within a three-dimensional woven preform using MicroCT scanning. |
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