Effect of water ageing on nanoindentation response of single hemp yarn/epoxy composites |
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| Affiliation: | 1. Institut Pprime, CNRS-ISAE-ENSMA-Université de Poitiers UPR 3346, Département Physique et Mécanique des Matériaux, ENSMA 1 av Clément Ader, 86961 Futuroscope, Chasseneuil, France;2. Institut Pprime, CNRS-Université de Poitiers-ISAE-ENSMA UPR 3346, Département Physique et Mécanique des Matériaux, SP2MI, bd M&P Curie, 86962 Futuroscope, Chasseneuil, France;1. Institut de Génie Biomédical, Department of Physiology, Faculty of Medicine, Université de Montréal, CP 6128, Succ Centre-Ville, Montréal H3C 3J7, Canada;2. Centre de Recherche, Hôpital du Sacré-Coeur de Montréal, Canada;1. Institute of Parasitology, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 266a, 8057 Zurich, Switzerland;2. Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 270, 8057 Zurich, Switzerland |
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| Abstract: | This paper aims to evaluate the influence of water ageing on nanoindentation response of the in situ components of hemp/epoxy composites. Specific samples have been tested, made of single hemp yarn composites with two different epoxy resins. Analysis of indentation points depending on their location in the yarn microstructure has been performed. Measurements showed the influence of neighbouring fibres on the reduced modulus in the confined resin. Water induces a decrease in nanoindentation properties, and maximum decrease in reduced modulus takes place in the interfacial zone, which shows the significant degradation of the fibre/matrix interface caused by water ageing. Evolutions in the indentation properties induced by water are similar for both partially bio-based and fully synthetic epoxy resin composites. All these results bring insights into the influence of water ageing of each constituent of hemp fibre reinforced composites and give interesting data for developing eco-composite materials. |
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| Keywords: | A. Polymer-matrix composites (PMCs) A. Natural fibres D. Moisture Nanoindentation |
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