par Kherouf, Fakhreddine;Boutabba, Smail;Bey, Kamel;Chettah, Ameur 
;Boyer, Jean Claude
Référence Mechanics and Industry, 16, 3, 309
Publication Publié, 2015
;Boyer, Jean ClaudeRéférence Mechanics and Industry, 16, 3, 309
Publication Publié, 2015
Article révisé par les pairs
| Résumé : | This paper presents an improved numerical simulation of bulk metal forming processes. It takes into the account the advanced formalism of large displacements and large deformations. Also, the interface workpiece formalism is considered. Metallographic studies are conducted to determine the evolution of the micro hardness as a function of annealing time and that to characterize accurately the plastic range of aluminum alloy for a range of plasticity 160%. The obtained results of metallographic studies are used to simulate a upsetting under the friction law of the plastic wave. A numerical simulation by FEM of bulk forming alloy is carried out by replacing the real profile of the surface roughness by two triangular profiles, the first has the same height as the real profile and the second has the same area then by a trapezoidal profile of the same height. The obtained results are compared to Challen and Oxley results in order to validate the triangular profile used in the friction model of plastic wave. |
