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Three-dimensional assessment of low velocity impact damage in particle toughened composite laminates using micro-focus X-ray computed tomography and synchrotron radiation laminography |
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| Affiliation: | 1. Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, United Kingdom;2. ANKA/Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Karlsruhe, Germany;3. European Synchrotron Radiation Facility (ESRF), 6 rue Jules Horowitz, Grenoble, France;1. Faculty of Engineering and Environment, University of Southampton, Highfield, Southampton SO17 1BJ, UK;2. Department of Aerospace Engineering, MIT Campus, Anna University, Chennai, India;3. Università degli Studi di Camerino, School of Architecture and Design, Viale della Rimembranza, 63100 Ascoli Piceno, Italy;1. School of Mechanical, Aerospace and Civil Engineering, University of Manchester, M13 9PL, UK;2. Centre for Low Impact Buildings, Faculty of Engineering and Computing, Coventry University, CV 5FB, UK;3. Henry Moseley X-ray Imaging Facility, School of Materials, University of Manchester, M13 9PL, UK;4. Diamond Light Source, Harwell Oxford Campus, Didcot OX11 0DE, UK;5. Aerospace Research Institute, University of Manchester, M13 9PL, UK |
| Abstract: | Results are presented studying the contribution of particle toughening to impact damage resistance in carbon fibre reinforced polymer materials. Micro-focus X-ray computed tomography and synchrotron radiation computed laminography were used to provide a novel, multiscale approach for assessing impact damage. Thin (1 mm thick) composite plates containing either untoughened or particle-toughened resin systems were subjected to low velocity impact. Damage was assessed three-dimensionally at voxel resolutions of 0.7 μm and 4.3 μm using SRCL and μCT respectively; the former being an innovative approach to the laterally extended geometry of CFRP plates. Observations and measurements taken from μCT scans captured the full extent of impact damage on both material systems revealing an interconnected network of intra- and inter-laminar cracks. These lower resolution images reveal that the particle-toughened system suppresses delaminations with little effect on intralaminar damage. The higher resolution images reveal that the particles contribute to toughening by crack deflection and bridging. |
| Keywords: | A. Carbon fibre B. Impact behaviour B. Fracture toughness X-ray computed tomography |
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