Communication avec acte


A coupled thermo-mechanical pseudo inverse approach for preform design in forging
AIP Conference Proceedings 1896, 170004 (2017) ; https://doi.org/10.1063/1.5008202

par   Anoop Ebey THOMAS , Boussad ABBES , Yu Ming LI , Fazilay ABBES , Ying Qiao GUO , J.L. Duval

Résumé :

Abstract :
Hot forging is a process used to form difficult to form materials as well as to achieve complex geometries. This is possible due to the reduction of yield stress at high temperatures and a subsequent increase in formability. Numerical methods have been used to predict the material yield and the stress/strain states of the final product. Pseudo Inverse Approach (PIA) developed in the context of cold forming provides a quick estimate of the stress and strain fields in the final product for a given initial shape. In this paper, PIA is extended to include the thermal effects on the forging process. A Johnson-Cook thermo-viscoplastic material law is considered and a staggered scheme is employed for the coupling between the mechanical and thermal problems. The results are compared with available commercial codes to show the efficiency and the limitations of PIA.


Thématique du GRESPI concernée par cet article :

          -Mécanique