Article dans une revue avec comité de lecture

A Pseudo Inverse Approach with kinematically admissible intermediate configurations for the Axi-symmetrical cold forging modelling
Advanced Materials Research Volume 399-401, Pages 1832-1837, 2012.

par   Ali HALOUANI , Yu Ming LI , Boussad ABBES , Ying Qiao GUO

Résumé :

A simplified method called "Pseudo Inverse Approach" (PIA) has been developed for the axi-symmetrical cold forging modeling in this paper. The traditional "Inverse Approach" (IA) based on the assumptions of the proportional loading and simplified tool actions may quickly give a fairly good strain distribution, but poor stress estimation. Meanwhile the PIA proposed in this paper not only keeps the advantages of the Inverse Approach but also gives good stress estimation by taking into account the loading history. To fulfill this aim, some kinematically admissible intermediate configurations represented by the free surface are used to consider the deformation paths without classical contact treatment. A new direct algorithm of plasticity integration has been used by using the notion of equivalent stress and the tensile curve, leading to a very fast and robust plastic integration procedure. An axi-symmetrical forging has been taken as an example to validate the PIA.

Thématique du GRESPI concernée par cet article :