Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Multisurface plasticity for Cosserat materials: plate element implementation and validation

Abstract : The macroscopic behaviour of materials is affected by their inner micro-structure. Elementary considerations based on the arrangement, and the physical and mechanical features of the micro-structure may lead to the formulation of elastoplastic constitutive laws, involving hardening/softening mechanisms and non-associative properties. In order to model the non-linear behaviour of micro-structured materials, the classical theory of time-independent multisurface plasticity is herein extended to Cosserat continua. The account for plastic relative strains and curvatures is made by means of a robust quadratic-convergent projection algorithm, specifically formulated for non-associative and hardening/softening plasticity. Some important limitations of the classical implementation of the algorithm for multisurface plasticity prevent its application for any plastic surfaces and loading conditions. These limitations are addressed in this paper, and a robust solution strategy based on the Singular Value Decomposition technique is proposed. The projection algorithm is then implemented into a finite element formulation for Cosserat continua. A specific finite element is considered, developed for micropolar plates. The element is validated through illustrative examples and applications, showing able performance.
Liste complète des métadonnées

Littérature citée [40 références]  Voir  Masquer  Télécharger
Contributeur : Michele Godio Connectez-vous pour contacter le contributeur
Soumis le : mardi 3 mai 2016 - 14:38:47
Dernière modification le : vendredi 1 juillet 2022 - 14:00:22
Archivage à long terme le : : mardi 24 mai 2016 - 18:26:21


Fichiers produits par l'(les) auteur(s)




Michele Godio, Ioannis Stefanou, Karam Sab, Jean Sulem. Multisurface plasticity for Cosserat materials: plate element implementation and validation. International Journal for Numerical Methods in Engineering, Wiley, 2016, ⟨10.1002/nme.5219⟩. ⟨hal-01310970⟩



Consultations de la notice


Téléchargements de fichiers