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Communication Dans Un Congrès Année : 2010

Implementation of an evolving non quadratic anisotropic behaviour for the closed packed materials

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Résumé

In this paper, the mechanical behaviour of α-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.
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Dates et versions

hal-00524174 , version 1 (07-10-2010)

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Citer

Benoît Revil-Baudard, Elisabeth Massoni. Implementation of an evolving non quadratic anisotropic behaviour for the closed packed materials. NUMIFORM 2010: Proceedings of the 10th International Conference on Numerical Methods in Industrial Forming Processes Dedicated to Professor O. C. Zienkiewicz (1921–2009), Jun 2010, Pohang, North Korea. pp.Pages 228-234, ⟨10.1063/1.3457556⟩. ⟨hal-00524174⟩
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