Wheat endosperm as a cohesive granular material - Agropolis Accéder directement au contenu
Article Dans Une Revue Journal of Cereal Science Année : 2008

Wheat endosperm as a cohesive granular material

Vincent Topin
  • Fonction : Auteur
Jean-Yves Delenne

Résumé

We introduce a cohesive granular model of the wheat endosperm involving a discrete phase composed of starch granules, a continuous phase representing the protein matrix and pores. The cohesion of the texture is governed by adherence between starch and protein, reflecting the biochemical nature of the interface, and the protein content that controls the connectivity between starch granules. We present a detailed parametric study of the stiffness, yield strength and regimes of crack propagation under tensile loading. We then show that starch damage, as a descriptor of wheat hardness, scales with the relative toughness between the starch and the starch-protein interface. The toughness appears therefore to be the control parameter governing transition from 'soft' to 'hard' behavior. Interestingly, this parameter combines the starch-protein adherence with protein content, two major quantities often assumed to underly wheat hardness.
Fichier principal
Vignette du fichier
Topin2008.pdf (534.35 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-00759643 , version 1 (14-06-2021)

Licence

Paternité

Identifiants

Citer

Vincent Topin, Farhang Radjai, Jean-Yves Delenne, Abdelkrim Sadoudi, Frédéric Mabille. Wheat endosperm as a cohesive granular material. Journal of Cereal Science, 2008, 47 (2), pp.347-356. ⟨10.1016/j.jcs.2007.05.005⟩. ⟨hal-00759643⟩
184 Consultations
125 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More