Influence of moisture uptake on the static,cyclic and dynamic behaviour of unidirectional flax fibre-reinforced epoxy laminates |
| |
| Affiliation: | 1. C2MA, Ecole des mines d’Alès, F-30319 Alès, France;2. FEMTO-ST UMR6174, Univ. Bourgogne Franche-Comté, F-25000 Besançon, France;3. DRIVE EA1859, Univ. Bourgogne Franche-Comté, F-58000 Nevers, France;1. LAUM – Laboratoire d’Acoustique de l’Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France;2. ESTACA’Lab – Pôle Mécanique des Matériaux Composites et Environnement, Parc Universitaire Laval-Changé, Rue Georges Charpak, BP-76121, 53061 Laval Cedex 9, France;3. LAMPA – Laboratoire Angevin de Mécanique Procédés et innovAtion, Arts et Métiers ParisTech Campus Angers 2, Boulevard du Ronceray, 49 035 Angers Cedex 01, France;1. DRIVE–ISAT, Université de Bourgogne, 58027 Nevers Cedex, France;2. LAMPA, Arts et Métiers ParisTech, 49100 Angers Cedex, France;1. Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44 bus 2450, 3001 Heverlee, Belgium;2. Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Louvain-la-Neuve, Belgium;1. Normandie Univ., France;2. UNICAEN, CIMAP, F-14050 Caen, France;3. École Nationale Supérieure d''Ingénieur de Caen (ENSICAEN), F-14050 Caen, France;4. CNRS, UMR 6252, F-14050 Caen, France;5. CEA, UMR 6252, F-14050 Caen, France;6. Université de Franche-Comté, FEMTO ST, F-25044 Besançon, France;7. CNRS, UMR 6174, F-25044 Besançon, France;1. KU Leuven – Department of Materials Engineering, Kasteelpark Arenberg 44 – bus 2450, 3001 Heverlee, Belgium;2. McGill University – Department of Mechanical Engineering, 817 Sherbrooke St. West, Montreal, Quebec H3A0C3, Canada |
| |
| Abstract: | This papers aims to characterize the influence of moisture uptake on the mechanical behaviour of unidirectional flax fibre-reinforced epoxy laminates. Monotonic and cyclic tensile tests and free vibration characterization are carried out. Results show that UD flax-epoxy composites, when exposed to hygrothermal conditioning at 70 °C and 85% RH, exhibit a diffusion kinetic which follows a one dimensional Fickian behaviour. The mass uptake at equilibrium is approximately 3.3% and the diffusion coefficient 6.5 × 10−6 m2 s−1. Water vapour sorption is shown to induce a significant change in the shape of the tensile stress-strain curve, a decrease in the dynamic elastic modulus of about 20% and a 50% increase in the damping ratio. Contrary to all expectations, water saturation does not degrade the monotonic tensile strength of such a flax-epoxy composites and leads to an increase in the fatigue strength for a high number of cycles. |
| |
| Keywords: | A. Polymer-matrix composites A. Natural fibres B. Mechanical properties C. Moisture |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
