Contrast enhancement in visualisation of woven composite architecture using a MicroCT Scanner. Part 2: Tow and preform coatings |
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| Authors: | Luke P Djukic Israel Herszberg William R Walsh Gregory A Schoeppner B Gangadhara Prusty |
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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, Victoria 3207, Australia;3. The University of New South Wales, Surgical and Orthopaedic Research Laboratories, Sydney, NSW 2052, Australia;4. Air Force Research Laboratories, Wright-Patterson Air Force Base, Dayton, OH, USA;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. 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. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Jiangsu 210016, China;2. Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon, China;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 method which was used to visualise tow architecture in woven composites, with the ultimate goal of three-dimensional model generation. It is difficult to discriminate between elements of carbon-fibre composites using MicroCT, particularly the region between co-aligned neighbouring tows. Methods used to facilitate visualisation by enhancing contrast during scanning were discussed in part one Djukic LP, Herszberg I, Walsh WR, Schoeppner GA, Prusty BG, Kelly DW. Contrast enhancement in visualisation of woven composite tow architecture using a MicroCT Scanner. Part 1: fabric coating and resin additives. Compos Part A 2009;40:553–65.]. In order to improve upon these methods, tows were coated in a material of higher density and subsequently woven into a fabric. The most successful coatings were found to be gold and iodine. Adequate visualisations of glass tows were possible without contrast enhancement. These methods can be combined to allow multiple levels of contrast within a sample, as demonstrated with a three-dimensional woven preform. Three-dimensional reconstructions of interior tow architectures were made from the scans of contrast enhanced specimens. |
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