Andreas Obereder, Alexander Kainz,
"Fast Numerical Simulation of 3D Steady-State Hot Rolling Processes by Utilizing Diffpack and Deform"
: PAMM - Proc. Appl. Math. Mech., Vol. 4, Seite(n) 362-363, 12-2004
Fast Numerical Simulation of 3D Steady-State Hot Rolling Processes by Utilizing Diffpack and Deform
Sprache des Titels:
PAMM - Proc. Appl. Math. Mech.
In hot rolling of steel a precise determination of strip spread, lateral flow, profile and flatness can be considered as key points to produce top quality strips satisfying the most demanding tolerances. Typical 3D-effects like broadening and relative strip profile changes can only be predicted precisely by 3D-numerical simulations. Commercial finite element packages, however, are very time consuming, especially when based on (updated) Lagrangian concepts and one is merely interested in the stationary process behaviour. Therefore, a fast quasi-stationary description in Eulerian coordinates with deformationupdates via the streamline technique was developed and implemented numerically. The underlying rigid-viscoplastic constitutive law for the strip or slab was implemented according to a non-linear Newtonian fluid. The solution of the free boundary value or contact problem including friction leads to a non-linear variational inequality, which is solved iteratively in Eulerian coordinates. The self-developed simulation code (written in C++) can handle non-linear plastic materials, contact and friction between the deformed work roll and the slab, including also grid adaptations. In this report simulation results for both edger and flat passes are presented. These results were calibrated with real mill process data and also validated against the commercial software package DEFORM and yields satisfactory correspondence.