Article dans une revue avec comité de lecture

Fast Pseudo Inverse Approach and direct plasticity algorithm for metal forming modelling
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering, Vol. 18(6), pp. 1-14, 2011.

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

Résumé :

A simplified method called "Inverse Approach" (IA) has been developed for axi-symmetrical cold forging modelling. The approach is based on the knowledge of the final part shape. The assumptions of the proportional loading and the simplified tool actions make the Inverse Approach calculation very fast. Numerical tests have shown that the Inverse Approach gave fairly good strain estimation but poor stress estimation because of neglecting the loading history. A new approach called "Pseudo Inverse Approach" (PIA) was presented which keeps the advantages of the Inverse Approach but gives good stress estimation taking into account the loading history. Some intermediate configurations were introduced and corrected by using a free surface method to consider the deformation paths without classical contact treatment. A new direct algorithm of plasticity was developed using the notion of equivalent stress and the tensile curve, leading to a very fast and robust plastic integration procedure. The comparison with ABAQUS® shows the efficiency and limitations of the PIA. This PIA can be used for the preliminary preform design and optimization for the forging process modelling.

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