Prediction of strain localization during sheet metal forming using bifurcation analysis and Gurson-type damage

Lotfi Mansouri (1) , Hocine Chalal (1) , Farid Abed-Meraim (1) , Tudor Balan (1)

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

The strain localization phenomenon that may occur during sheet metal forming represents a major cause of defective parts produced in the industry. Several instabilitycriteria have been developed in the literature to predict the occurrence of these instabilities. The proposed work aims to couple a Gurson-type model to the Rice’s localization criterion. The implementation of the modeling is achieved via a user subroutine (Umat) in Abaqus/std using a Runge-Kutta explicit integration scheme. Finally, we show the effectiveness of the proposed coupling for the prediction of the formability of stretched metal sheets.

Mots clés: Finite Elasto-Plasticity; Damage; Strain Localization; Sheet Metal Forming; Forming Limit Diagram

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]

Lotfi Mansouri, Hocine Chalal, Farid Abed-Meraim, Tudor Balan. Prediction of strain localization during sheet metal forming using bifurcation analysis and Gurson-type damage. COMPLAS’XI, Sep 2011, Barcelone, Spain. ⟨hal-01199633⟩