Finite element prediction of sheet forming defects using elastic-plastic, damage and localization models

Badis Haddag (1) , Farid Abed-Meraim (1) , Tudor Balan (1)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux

In this work, an advanced anisotropic elastic-plasticity model is combined with a damage model and a strain localization criterion in the aim to describe accurately the mechanical behavior of sheet metals. Large strain, fully three-dimensional, implicit time integration algorithms are developed for this model and implemented in the finite element code Abaqus. The resulting code is used to predict the strain localization limits as well as the springback after forming of sheet steels. The impact of strain-path dependent hardening models on the limit strains and on the amount of springback is addressed.

Mots clés: Damage; Elastic-plasticity; Finite element simulation; Forming limits; Implicit time integration; Large strains; Sheet metal forming; Springback; Strain-path-dependent hardening

Domaines: Génie des procédés; Matériaux; Mécanique [physics.med-ph]; Génie mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Mécanique des matériaux [physics.class-ph]; Mécanique des solides [physics.class-ph]; Mécanique des structures [physics.class-ph]

Badis Haddag, Farid Abed-Meraim, Tudor Balan. Finite element prediction of sheet forming defects using elastic-plastic, damage and localization models. American Institute of Physics Conf. Proc., 2007, 908, pp.227-232. ⟨10.1063/1.2740816⟩. ⟨hal-01206463⟩