Constitutive Modelling of Anisotropy, Hardening and Failure of Sheet Metals
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.
J.R. Duflou, R. Clarke, M. Merklein, F. Micari, B. Shirvani and K. Kellens
I. N. Vladimirov et al., "Constitutive Modelling of Anisotropy, Hardening and Failure of Sheet Metals", Key Engineering Materials, Vol. 473, pp. 631-636, 2011