Modelling of Thermal Stresses in Industrial Continuous Casting Processes

Ă…berg, J., Vynnycky, M., Fredriksson, H.
KTH/Metallernas Gjutning, Stockholm, Sweden

This paper reports on progress in the implementation of COMSOL Multiphysics 3.2 to model thermal stresses in a three-dimensional solidifying shell, as occurs typically in the industrial continuous casting of copper, copper alloys and steel.

Computer memory requirements prohibit a direct 3D numerical simulation of the temperature and the stresses. Instead, we use the fact that casting geometries are usually slender to divide the calculation into three steps that are each less memoryintensive: (i) heat transfer and solidification is simulated using an arbitrary Lagrangian-Eulerian model; (ii) the temperature solution is used to solve the force equilibrium equations in generalised plane strain mode appropriate for a moving body; (iii) this solution is used to compute the accumulated stress and strain in the body.

Comparison between an analytical solution and a numerical solution, that requires the simultaneous use of several of COMSOL Multiphysics’ peripheral features, is presented.