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Internal strain measurement and cure monitoring of 3D angle interlock woven carbon fibre composites
Affiliation:1. Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China;2. School of Mechanical-Electronic and Vehicle Engineering, Weifang University, Weifang 261061, China;1. College of Textile, 2401 Research Drive, North Carolina State University, Raleigh, NC 27695, USA;2. Textile Research Division, National Research Centre, 33 El Bohouth St., Dokki 12622, Egypt;3. Department of Mechanical and Aerospace Engineering, Campus Box 7910, North Carolina State University, Raleigh, NC 27695, USA;1. School of Mechanical Engineering, Chung-Ang University (CAU), 221, Huksuk-Dong, Dongjak-Gu, Seoul 156-756, Republic of Korea;2. Korea Photonics Technology Institute Lighting Solution R&BD Center, Gwangju, Republic of Korea;1. University of Maine, Advanced Structures and Composites Center, 35 Flagstaff Road, Orono, ME 04469, United States;2. Albany Engineered Composites, 112 Airport Drive, Rochester, NH 03867, United States
Abstract:This study presents a methodology to accurately embed EFPI (Extrinsic Fabry Perot Interferometer) fibre optic sensors within the resin channels of 3D woven composite for the purpose of monitoring strain during tensile tests on a 3D woven composite. Using the same sensors the cure induced strain measurement was developed into a valid in situ cure monitoring technique for an epoxy matrix composite through correlation with rheological based cure strain data. Specific strain events were attributed to the gelation and vitrification phases of the epoxy cure cycle.
Keywords:A  3-Dimensional reinforcement  B  Rheological properties  E  Cure
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