1 research outputs found
Parameter estimation of temperature dependent material parameters in the cooling process of TMCP steel plates
Accelerated cooling is a key technology in producing thermomechanically
controlled processed (TMCP) steel plates. In a TMCP process hot plates are
subjected to a strong cooling what results in a complex microstructure leading
to increased strength and fracture toughness. The microstructure is strongly
affected by the temperature evolution during the cooling process as well as
residual stresses and flatness deformations. Therefore, the full control
(quantification) of the temperature evolution is very important regarding plate
design and processing. It can only be achieved by a thermophysical
characterization of the material and the cooling system. In this paper, we
focus on the thermophysical characterization of the material parameters.
Mathematically, we consider a specific inverse heat conduction problem. The
temperature evolution of a heated steel plate passing through the cooling
device is modeled by a 1D nonlinear partial differential equation (PDE) with
unknown temperature dependent material parameters, which describe the
characteristics of the underlying material. We present a numerical approach to
identify these material parameters up to some canonical ambiguity without any a
priori information.Comment: 14 pages, 10 figure