Implementation of an Evolving non Quadratic Anisotropic Behaviour for the Closed Packed Materials
- CEMEF Mines ParisTech, B.P. 207, F-06904 Sophia-Antipolis (France)
In this paper, the mechanical behaviour of alpha-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.[1], to model the plasticity of hexagonal closed packed materials. The implementation of this model in a finite element software switch 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 defining all the parameters needed to model the elasto-plastic behaviour. Simulations 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.
- OSTI ID:
- 21366773
- Journal Information:
- AIP Conference Proceedings, Vol. 1252, Issue 1; Conference: NUMIFORM 2010: 10. international conference on numerical methods in industrial forming processes dedicated to Professor O. C. Zienkiewicz (1921-2009), Pohang (Korea, Republic of), 13-17 Jun 2010; Other Information: DOI: 10.1063/1.3457556; (c) 2010 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANISOTROPY
COMPUTER CODES
DEFORMATION
FINITE ELEMENT METHOD
HARDENING
PLASTICITY
SIMULATION
TITANIUM ALLOYS
TITANIUM-ALPHA
ALLOYS
CALCULATION METHODS
ELEMENTS
MATHEMATICAL SOLUTIONS
MECHANICAL PROPERTIES
METALS
NUMERICAL SOLUTION
TITANIUM
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS