Original scientific paper
Variational and numerical approach to a quasi-steady rolling problem
T. A. Angelov
; Institute of Mechanics, Bulgarian Academy of Sciences, Sofia, BULGARIA
Abstract
In this paper, a variable stiffness parameters method (VSPM), is applied to a quasi-steady, hot strip rolling problem. A slightly compressible, rigid-viscoplastic, and isotropic hardening material model is assumed for the workpiece. For the roll-workpiece interface, a nonlinear friction law is supposed to hold. The problem is stated in the form of a variational inequality, containing nonlinear and nondifferentiable terms. Under certain restrictions on the material characteristics, the convergence of the VSPM is shown. Combining the VSPM with the FEM, an algorithm is proposed and applied to solve numerically a rolling problem, and the obtained results are illustrated and discussed.
Keywords
quasi-steady rolling, friction, variable stiffness parameters method (VSPM), FEM
Hrčak ID:
316012
URI
Publication date:
30.6.2003.
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