Numerical Investigation of the Limit Strains in Sheet Forming Involving Bending
Communication avec acte
Date
2008Abstract
In this work, the finite element method is used to simulate a typical FLD test over tools of different radii. Parameters like the mesh density, element type, numerical determination of the onset of strain localization, limit strain definition etc. have been investigated. Finally, the limit strain for plane strain tension has been determined as a function of the thickness vs. tool radius (t/R) ratio. These simulations confirm that increasing the curvature of the tool increases the value of the limit strains. They also reveal that, as soon as bending becomes important, the practical relevance of the limit strains diminishes - At least with their current definition. The need for new strain localization models is emphasized, together with some of the associated challenges.
Files in this item
- Name:
- LEM3_ICTP_2008_BALAN
- Size:
- 427.1Kb
- Format:
- Description:
- LEM3-Conference-ICTP-2008-Bala ...
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureHADDAG, Badis; ABED-MERAIM, Farid; BALAN, Tudor (Elsevier, 2009)Sheet 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 ...
-
Article dans une revue avec comité de lectureHADDAG, Badis; ABED-MERAIM, Farid; BALAN, Tudor (Springer Verlag, 2008)This work aims to study the strain localization in different sheet metal forming processesby the finite element method using advanced behaviour models. In order to improve the prediction of the formability limit of sheets ...
-
Communication avec acteALTMEYER, Guillaume; ABED-MERAIM, Farid; BALAN, Tudor (Association Française de Mécanique, 2009)Différentes approches de modélisations ont été proposées pour prédire les phénomènes de localisation lors d’opérations de mise en forme de tôles métalliques par emboutissage. Des exemples de ces approches sont le principe ...
-
Communication avec acteSALAHOUELHADJ, Abdellah; CHALAL, Hocine; ABED-MERAIM, Farid; BALAN, Tudor (Onate, E; Owen, DRJ; Peric, D; Suarez, B, 2011)In this contribution, the formulation of the SHB8PS continuum shell finite element is extended to anisotropic elastic-plastic behavior models with combined isotropic-kinematic hardening at large deformations. The resulting ...
-
Communication sans acteALTMEYER, Guillaume; ABED-MERAIM, Farid; BALAN, Tudor (2010)The originality of the approach used here is to present stability conditions of metallic materials modeled by general phenomenological laws and to apply them to the study of the formability of thin metallic sheets. The ...