Skip to Main content Skip to Navigation
Theses

Modélisation thermomécanique tridimensionnelle par éléments finis de la coulée continue d'aciers

Abstract : In this work, we introduce a thermo-mechanical model of the steel continuous casting process, in three dimensions. With our approach, it is possible to obtain thermo-mechanical steady-state solution of the process, for the whole product. The thermo-mechanical history of the product can thus be deduced, by viewing the stress and temperature fields, for instance. One of the expected results deals with the bulging between rolls, which is known to give birth to segregation phenomena. We base our study on the global non steady-state strategy using a Lagrangian approach. The flow of matter in the studied domain is simulated through one injection tool located in the upper surface of the domain. The lower face is supposed to be driven down at the starting block velocity. However, the mesh displacement at the upper surface is imposed to zero and consequently the mesh volume enlarges continuously. The evolution of the mesh - relocation of nodes, creation of new nodes - is treated by a specific generation mesh technique. Concerning the model, non-steady thermo-mechanical conservation equations are solved. The approach to the mechanical problem is of equivalent one-phase type (velocity and pressure are the unknowns). In our approach, natural convection and macrosegregation are neglected but thermal dilatation and solidification shrinkage are accounted for. Solid, mushy and liquid states obey respectively to elastoviscoplastic, viscoplastic and Newtonian behaviours. The rheology of the solid state is calculated thanks to laws from the literature. These developments have been validated on industrial cases, showing a good qualitative and quantitative agreement.
Document type :
Theses
Complete list of metadatas

https://pastel.archives-ouvertes.fr/pastel-00001334
Contributor : Ecole Mines Paristech <>
Submitted on : Tuesday, July 26, 2005 - 8:00:00 AM
Last modification on : Thursday, September 24, 2020 - 5:22:54 PM
Long-term archiving on: : Thursday, September 30, 2010 - 7:02:52 PM

Identifiers

  • HAL Id : pastel-00001334, version 1

Citation

Frédéric Costes. Modélisation thermomécanique tridimensionnelle par éléments finis de la coulée continue d'aciers. Sciences de l'ingénieur [physics]. École Nationale Supérieure des Mines de Paris, 2004. Français. ⟨NNT : 2004ENMP1267⟩. ⟨pastel-00001334⟩

Share

Metrics

Record views

975

Files downloads

3254