Issue |
Matériaux & Techniques
Volume 99, Number 6, 2011
Numéro thématique : Biomatériaux - Le chanvre Topical issue: Biomaterials - The hemp |
|
---|---|---|
Page(s) | 683 - 689 | |
Section | Interface chanvre / polymères | |
DOI | https://doi.org/10.1051/mattech/2011120 | |
Published online | 21 December 2011 |
The possible role of microfibril angle of Hemp fibre during fatigue tests and its determination using Wide-Angle X-ray diffraction
Rôle potentiel de l’angle des microfibrilles lors des essais de fatigue des fibres de chanvre et sa détermination par diffraction des rayons X aux grands angles
1
Department of Applied Mechanics- FEMTO-ST Institute – UMR CNRS
6174, University of Franche-Comté, 24 chemin de l’Epitaphe, 25000
Besançon,
France
e-mail: vincent.placet@univ-fcomte.fr
2
AgroParisTech, LERFOB, UMR INRA 1092 - ENGREF,
14 rue Girardet,
54042
Nancy Cedex,
France
Received: 8 October 2010
Accepted: 2 August 2011
The orientation of the microfibril of cellulose in cell wall undeniably plays a predominant role in the elastic properties of natural fibres. In particular, the reorientation of the microfibrils is supposed to be involved in the stiffening phenomena of fibres under cyclic loading. In order to measure the MFA on natural fibres, this work proposed a method based on Wide Angle X-ray Scattering (WAXS). The ultimate goal of this work is to couple cyclic loading and MFA measurement in the near future.
Résumé
L’orientation des microfibrilles de cellulose dans la paroi cellulaire joue un rôle dominant sur les propriétés élastiques des fibres naturelles. Le phénomène de rigidification des fibres sous sollicitations mécaniques cycliques est en particulier attribué à la réorientation des microfibrilles. Ce papier propose une méthode de détermination de l’Angle des Microfibrilles (AMF) basée sur la diffraction des rayons X aux grands angles. Le but ultime de ce travail est de coupler le chargement mécanique cyclique et la détermination de l’AMF in situ.
Key words: Natural fibre / mechanical properties / microfibril angle / X-ray diffraction
Mots clés : Fibres végétales / propriétés mécaniques / angle des microfibrilles / diffraction aux rayons X
© EDP Sciences, 2011
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