Modelling the effect of material properties and process parameters on tow impregnation in out-of-autoclave prepregs |
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| Authors: | T Centea P Hubert |
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| Affiliation: | 1. Department of Mechanical and Aerospace Engineering, University of Texas at Arlington, Arlington, TX, USA;2. Numerical Technology Company LLC, Dallas, TX, USA;3. Air Force Research Lab AFRL/RXCC, Wright Patterson Air Force Base, OH, USA;1. Airbus Group Innovation, chemin du Chaffault Bâtiment A1, 44340 Bouguenais, France;2. Laboratoire de Thermocinétique de Nantes (UMR CNRS 6607), LUNAM Université, Université de Nantes, La Chantrerie, 44300 Nantes, France;3. Institut de Recherche en Génie Civil et Mécanique (UMR CNRS 6183), LUNAM Université, Université de Nantes, 58 rue Michel Ange, 44600 Saint-Nazaire, France;1. Chair on Composites of High Performance, École polytechnique de Montréal, Canada;2. Department of Mechanical Engineering, University of Delaware, USA;3. Hexcel Reinforcements, Les Avenieres, France;4. Department of Metallurgy and Materials Engineering, KU Leuven, Belgium;5. Mechanical Engineering Department, University of Wisconsin, USA;6. Institut für Polymerwerkstoffe und Kunststofftechnik, Technische Universität Clausthal, Germany;7. Campus da FEUP, Universidade do Porto, Portugal;8. Centre of Structure Technologies, Eidgenössische Technische Hochschule Zürich, Switzerland;9. Laboratoire de technologie des Composites et Polymères, École Polytechnique Fédérale de Lausanne, Switzerland;10. Division of Materials, Mechanics and Structures, University of Nottingham, UK;11. Institute of Material Science and Technology, National University of Mar del Plata, Argentina;12. Universitat Politecnica de Valencia, Spain;13. Swerea SICOMP, Öjebyn, Sweden;14. Institute for Carbon Composites, Faculty of Mechanical Engineering, Technische Universitaet Muenchen, Garching, Germany;15. Pôle de Plasturgie de l’Est, PPE, France;p. Airbus Operations GmbH, Bremen, Germany |
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| Abstract: | Out-of-autoclave prepregs based on woven fabrics initially consist of dry tows and resin-rich areas. The tows allow air evacuation in the initial stages of processing and are subsequently infiltrated by surrounding matrix. The following study analyzes the relationship between material properties, process parameters and tow impregnation for three OOA prepregs. First, a representative model for tow impregnation is developed. Then, the model parameters are determined and the model predictions are correlated to impregnation data measured by X-ray microtomography. Finally, the model is used in a parametric study to investigate the effect of fibre architecture, cure cycle temperature and resin initial degree of cure on tow impregnation rate and to predict the possible occurrence of flow-induced micro-voids. |
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