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Simulation du comportement mécanique des alliages de titane pour les procédés de mise en forme à froid de produits plats.
- Source :
-
Mécanique & Industries . May-Aug2010, Vol. 11 Issue 3/4, p265-270. 6p. 5 Graphs. - Publication Year :
- 2010
-
Abstract
- In this paper, the mechanical behaviour of a titanium alloys is modelised for the cold forming processes. The elasto-plastic constitutive law is decomposed in an anisotropic plastic criterion, an isotropic hardening and a kinematic hardening. Non quadratic criteria have been developed by Cazacu et al. (Orthotropic yield criterion for hexagonal closed packed metals, Tnt. J. Plasticity 22 (2006) 1171-1194), to model the plasticity of hexagonal closed packed materials. The implementation of this model in a finite element software switches between two bases, the equilibrium is calculated in a reference basis and the anisotropy axes define a local basis, updated by the deformation gradient. An identification procedure, based on tensile tests, allows to define all the parameters needed to model the elasto-plastic behaviour. Simulation of cold forming processes (bulging and deep drawing) have been done to validate this model. Numerical results are compared with experimental data, obtained from speckles analysis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- French
- ISSN :
- 12962139
- Volume :
- 11
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Mécanique & Industries
- Publication Type :
- Academic Journal
- Accession number :
- 58597230
- Full Text :
- https://doi.org/10.1051/meca/2010029