Skip to Main content Skip to Navigation
Theses

Déformations élastiques des presses de forgeage et calcul parallèle

Abstract : To improve the precision of numerical simulations of cold forging processes a model of press deflection is introduced in Forge3® software. The press deformations are the result of a combined stiffness of the piece-tools-press that evolves during the forging process since the piece's geometry changes. Applying the virtual work principle to the whole system, the couples equations arise that determine the velocity/pressure field for the part and the tools, and also six additional degrees of freedom for rigid body motion that represent the deflection of the press. Account for this model in some industrial applications was found justified and efficient. The comparison of the simulation results with the experimental data has shown an excellent accordance, thus validating the model proposed and its implementation in Forge3® software. The second part of this work concerns the parallel computation and in particular the domain decomposition methods. On the base of two classical DD methods, the Schur complement method and FETI method, a new hybrid approach is proposed. It is better suited to the mix velocity/pressure formulation existing in Forge3®. The aspects of preconditioning and rigid body modes are as well treated. The results obtained while a performance study of these three methods for the Forge3® applications are very promising.
Document type :
Theses
Complete list of metadatas

https://pastel.archives-ouvertes.fr/pastel-00001513
Contributor : Ecole Mines Paristech <>
Submitted on : Monday, January 16, 2006 - 8:00:00 AM
Last modification on : Thursday, September 24, 2020 - 5:22:54 PM
Long-term archiving on: : Thursday, September 30, 2010 - 7:08:42 PM

Identifiers

  • HAL Id : pastel-00001513, version 1

Citation

Olga Karaseva. Déformations élastiques des presses de forgeage et calcul parallèle. Sciences de l'ingénieur [physics]. École Nationale Supérieure des Mines de Paris, 2005. Français. ⟨NNT : 2005ENMP1307⟩. ⟨pastel-00001513⟩

Share

Metrics

Record views

557

Files downloads

1839