Constitutive Modelling of Anisotropy, Hardening and Failure of Sheet Metals

Abstract:

The paper discusses the application of a newly developed coupled material model of finite anisotropic multiplicative plasticity and continuum damage to the numerical prediction of the forming limit diagram at fracture (FLDF). The model incorporates Hill-type plastic anisotropy, nonlinear Armstrong-Frederick kinematic hardening and nonlinear isotropic hardening. The numerical examples investigate the simulation of forming limit diagrams at fracture by means of the so-called Nakajima stretching test. Comparisons with test data for aluminium sheets display a good agreement between the finite element results and the experimental data.

• Periodical: Key Engineering Materials (Volume 473)
• Pages: 631-636
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.473.631
• Online since: March 2011
• Authors: Ivaylo N. Vladimirov, Yalin Kiliclar, Vivian Tini, Stefanie Reese
• Keywords: Continuum Damage, Finite Element, Kinematic Hardening, Materials Modelling, Plastic Anisotropy, Sheet Forming

References

[1] I.N. Vladimirov, M.P. Pietryga and S. Reese: Int. J. Plastic. Vol. 26 (2010), p.659.

[2] I.N. Vladimirov, M.P. Pietryga and S. Reese: J. Mater. Proc. Technol. Vol. 209 (2009), p.4062.

[3] I.N. Vladimirov, M.P. Pietryga and S. Reese: GAMM Mitt. Vol. 33 (2010), p.116.

[4] J. Lemaitre: J. Eng. Mater. Technol. 107 Vol. (1985), p.83.

[5] H. Takuda, K. Mori, N. Takakura and K. Yamaguchi: Int. J. Mech. Sc. Vol. 42 (2000), p.785.