Multi-scale foam : 3D structure/compressive behaviour relationship of agglomerated cork - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Materialia Année : 2019

Multi-scale foam : 3D structure/compressive behaviour relationship of agglomerated cork

Résumé

This study focuses on the microstructural aspects of a cork-based by-product known as agglomerated cork and its influence on the compressive mechanical behaviour. The material consists in granulates of a natural polymeric foam - cork - mixed together with a small quantity of a bio-sourced resin. Optical and scanning electron microscopy (SEM) are first used to investigate on the bead geometry and placement and interfaces arrangement. Then X-ray computed tomography allows to study the spatial arrangement of agglomerated cork microstructure and hence to complete and confirm 2D observations. 2D and 3D observations show a transverse anisotropic material which is confirmed by the mechanical tests. SEM pictures demonstrate an intricate and heterogeneous material. Microtomography confirms the presence of macroporosities between cork granulates having a mean volume around 0.1 mm 3 . Cork cell specific geometry is also confirmed. The volume of those cells lies around 10 −5 mm 3 . Finally quasi-static compression tests are run to establish a link between microstructure and mechanical behaviour thanks to digital image correlation (DIC). Cork agglomerate demonstrates strong strain localisation at its surface caused by its multi-scale structure.
Fichier principal
Vignette du fichier
I2M_AM_2019_LEBARBENCHON.pdf (6.28 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02405511 , version 1 (11-12-2019)

Identifiants

  • HAL Id : hal-02405511 , version 1

Citer

Louise Le Barbenchon, Jérémie Girardot, Jean-Benoit Kopp, Philippe Viot. Multi-scale foam : 3D structure/compressive behaviour relationship of agglomerated cork. Materialia, 2019, 5, pp.100219. ⟨hal-02405511⟩

Relations

32 Consultations
60 Téléchargements

Partager

Gmail Facebook X LinkedIn More