Effects of water ageing on the mechanical properties of flax and glass fibre composites: Degradation and reversibility

Abstract : Mechanical properties of flax-fibre reinforced composites (FFRC) are strongly affected by water ageing compared to glass-fibre reinforced composites (GFRC). This study highlights the influence of water absorption during immersion at 30°C on mechanical properties of unsaturated polyester reinforced composites. Flax-fibre composites showed a Fickian absorption behaviour and a water uptake 15 times higher than that of glass-fibre composites. GFRC's tensile modulus and maximum stress were slightly affected by water uptake while FFRC's tensile modulus decreased by 37%, and ultimate stress increased by 34%. A silane-based chemical treatment (1% compared to flax fibres) was applied onto flax fibres. Water uptake was slightly reduced by 9% while tensile modulus at saturation was enhanced by 22% on treated FFRC compared to untreated ones. Moreover, the complete recovery of the tensile modulus after desiccation suggests that ageing was mainly reversible: fibre and matrix plasticizing phenomena occurred during immersion at 30°C. No damage was noticed but composites' initial properties changed with the action of water: further crosslinking of matrix and release of fi-bre's extractibles into water were observed. Finally, the drying conditions influenced the return to the initial state before ageing insofar the flax fibres partially lost their initial humidity.
Type de document :
Communication dans un congrès
Liste complète des métadonnées

Littérature citée [20 références]  Voir  Masquer  Télécharger

Contributeur : Magalie Prudon <>
Soumis le : mercredi 13 janvier 2016 - 11:59:26
Dernière modification le : vendredi 14 février 2020 - 13:26:04
Archivage à long terme le : vendredi 11 novembre 2016 - 04:28:47


Apolinario_ ISNF2015.pdf
Fichiers produits par l'(les) auteur(s)


  • HAL Id : hal-01255205, version 1


Guilherme Apolinario, Patrick Ienny, Stéphane Corn, Romain Léger, Anne Bergeret, et al.. Effects of water ageing on the mechanical properties of flax and glass fibre composites: Degradation and reversibility. ICNF 2015 - 2nd International Conference on Natural Fibers, Apr 2015, Sao Miguel, Portugal. ⟨hal-01255205⟩



Consultations de la notice


Téléchargements de fichiers