Material characterization and residual stresses simulation during the manufacturing process of epoxy matrix composites |
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| Authors: | Y. Abou Msallem F. Jacquemin N. Boyard A. Poitou D. Delaunay S. Chatel |
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| Affiliation: | 1. GeM, Centrale Nantes, Université de Nantes, UMR CNRS 6183, France;2. LTN, Ecole Polytechnique de l’Université de Nantes, UMR CNRS 6607, France;3. Mechanical Modeling Research Team, EADS France CTO/IW/SP/ME, France;1. School of Applied Sciences, Manufacturing and Materials Department, Composites Centre, Cranfield University, Bedford MK43 0AL, UK;2. Division of Materials, Mechanics & Structures, University of Nottingham, University Park, Nottingham NG7 2RD, UK;1. School of Engineering, Faculty of Science Engineering and Built Environment, Deakin University, 75 Pigdons Road, Waurn Ponds, VIC 3217, Australia;2. Australian Future Fibres Research and Innovation Centre (AFFRIC), Deakin University, 75 Pigdons Road, Waurn Ponds, VIC 3216, Australia;3. School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW 2052, Australia;1. School of Mechanical and Instrument Engineering, Xi''an University of Technology, Xi''an, 710048, Shaanxi, China;2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi''an, 710072, Shaanxi, China;1. School of Engineering, Faculty of Science Engineering and Built Environment, Deakin University, Waurn Ponds, VIC 3217, Australia;2. Sir Lawrence Wackett Aerospace Research Centre, School of Aerospace, Mechanical, and Manufacturing Engineering, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia;3. Simuserv Pty. Ltd, Melbourne, VIC 3123, Australia |
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| Abstract: | A thermal, rheological and mechanical material characterization of an aeronautic epoxy resin from commercial prepreg is reported in this article. The kinetic of the crosslinking reaction of the resin is characterized and modeled. The specific heat, the glass transition temperature, the thermal expansion coefficients, the chemical shrinkage coefficients and the thermo-mechanical properties have been investigated as a function of temperature and degree of cure. Dynamic mechanical measurements are used to determine the gel point. Finally, the residual stresses developed during the curing process are calculated using a finite element simulation, taking into account the material properties evolutions according to proposed models. The results highlight the importance of the characterization accuracy and the associated models. |
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