A crystallographic dislocation model for describing hardening of polycrystals during strain path changes. Application to low carbon steels - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue International Journal of Plasticity Année : 2013

A crystallographic dislocation model for describing hardening of polycrystals during strain path changes. Application to low carbon steels

Résumé

Polycrystal aggregates subjected to plastic forming exhibit large changes in the yield stress and extended transients in the flow stress following strain path changes. Since these effects are related to the rearrangement of the dislocation structure induced during previous loading, here we propose a crystallographically-based dislocation hardening model for capturing such behavior. The model is implemented in the polycrystal code VPSC and is applied to simulate strain path changes in low carbon steel. The path changes consist of tension followed by shear at different angles with respect to the preload direction, and forward simple shear followed by reverse shear. The results are compared to experimental data and highlight the role that directional dislocation structures induced during preload play during the reload stage.

Domaines

Matériaux
Fichier principal
Vignette du fichier
kitayama2013.pdf (795.24 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00850219 , version 1 (21-04-2020)

Licence

Paternité

Identifiants

Citer

K. Kitayama, C.N. Tome, E.F. Rauch, J.J. Gracio, F. Barlat. A crystallographic dislocation model for describing hardening of polycrystals during strain path changes. Application to low carbon steels. International Journal of Plasticity, 2013, 46, pp.54-69. ⟨10.1016/j.ijplas.2012.09.004⟩. ⟨hal-00850219⟩
101 Consultations
200 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More