Strain localization analysis using large deformation anisotropic elastoplastic model coupled with damage
Communication avec acte
Date
2006-06Abstract
This work aims to study the strain localization during the plastic deformation of sheets metals. This phenomenon is precursor for the fracture of drawing parts, so its prediction using advanced behavior models is an active research field. Most often, an accurate prediction of localization requires damage to be considered in the simulation.
For this purpose, an advanced, anisotropic elastoplastic model has been coupled with a classical, isotropic damage model. The coupling with the damage model is carried out in the frame of continuum damage mechanics. In order to detect the localization during sheet forming, Rice’s localization criterion is introduced.
The coupled elastoplastic damage model is implemented in the Abaqus/Implicit software, via the user routine UMAT, while Rice’s criterion is incorporated in the same code, via the user routine UVARM. Simulations of typical rheological tests are performed in the numerical investigation. The predicted forming limits are very consistent with literature results. The fully 3D formulation adopted in our development allowed for some new results – like the out-ofplane orientation of the normal to the localization band.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureSheet metal forming processes generally involve large deformations together with complex loading sequences. In order to improve numerical simulation predictions of sheet part forming, physically-based constitutive models ...
-
Communication sans acteThe aim of this work is to study the strain localization during the plastic deformation of sheets metals. This phenomenon is precursor for the fracture of drawing parts, thus its prediction using advanced behavior models ...
-
Article dans une revue avec comité de lectureSheet metal forming processes generally involve large deformations together with complex loading sequences. In order to improve numerical simulation predictions of sheet parts forming, physically-based constitutive models ...
-
Communication avec acteThis work consists to study the spring back in the deep drawing of flat sheets. A phenomenological elastoplastic model taking into account the strain path change was implemented in the ABAQUS software using an implicit ...
-
Communication avec acteCe travail consiste à étudier par simulation le phénomène du retour élastique dans le procédé d’emboutissage des tôles métalliques. Un modèle phénoménologique d’élasto-plasticité, incluant deux modèles d’écrouissage combiné, ...