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Effect of relative humidity on mechanical properties of a woven thermoplastic composite for automotive application
Affiliation:1. Département Physique et Mécanique des Matériaux, Institut Pprime CNRS-ENSMA-Université de Poitiers UPR 3346, ISAE-ENSMA, 1 Avenue Clément Ader, 86961 Futuroscope, Chasseneuil, France;2. UET DEA-TC-AC, Technocentre Renault, Les Labos, 1 Avenue du Golf, 78288 Guyancourt, France;1. Cracow University of Technology, Faculty of Chemical Engineering and Technology, Warszawska 24, 31-155 Kraków, Poland;2. Jagiellonian University, Department of Chemistry, Ingardena 3, 30-060 Kraków, Poland;3. Photo High Technologies Ltd., Bobrzyńskiego 14, 30-348 Kraków, Poland;1. School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai 200240, PR China;3. Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK;4. Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics (HUST), Wuhan 430074, PR China;1. Department of Mechanical Engineering, Université du Québec à Trois-Rivières, Quebec, Canada;2. Centre de Recherche Industrielle du Québec, Québec City, Canada;1. MINES ParisTech, PSL - Research University, MAT - Centre des matériaux, CNRS UMR 7633, BP 87 91003 Evry, France;2. MINES ParisTech, PSL - Research University, CEMEF - Centre de mise en forme des matériaux, CNRS UMR 7635, CS 10207 rue Claude Daunesse, 06904 Sophia Antipolis Cedex, France;3. Hutchinson SA/TOTAL, Centre de Recherche et Innovation, Rue Gustave Nourry, 45120 Chalette-sur-Loing, France
Abstract:The purpose of this work is to characterise the influence of moisture content in a woven glass fibre reinforced polyamide 6,6 composite. Two different stacking sequences are studied: [(0/90)3] and [(±45)3] as well as the neat PA6,6 matrix. Samples have been conditioned through three ways: either water immersed, left at ambient temperature and humidity or dried in 35 °C oven. A one dimensional Fick's law has been used to model the water uptake in immersed samples. The glass transition temperature is highly affected by the presence of water and has been measured using modulated DSC technique. Finally, the effects of water on these composite materials have been investigated through tensile tests instrumented with acoustic emission monitoring (AE). Mechanical properties are highly affected by the presence of water in the composite. This result is even more visible on [(±45)3] sample because of the preferential loading of the matrix.
Keywords:Woven composites  Water ageing  Acoustic emission  Tensile behaviour
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