Abstract

An attempt is made to develop a kind of hybrid numerical method for computations of the thermal stresses during a solidification process. In this algorithm, the phase-change heat transfer analysis is perrformed by a finite volume method(FVM) and the thermal stress analysis in a solidifying body by a finite element method(FEM). The temperatures at the grid points calculated in the heat transfer analysis are transferred to those of gauss points in elements by a bi-cubic surface patch technique for the thermal stress analysis. A hyperbolic-sine constitutive law is used to prescribe the inelastic strain rate of material. Results for the unidirectional solidification process of a pure aluminum are compared with those of others and shows good agreement.

Keywords

• Finite Volume Method;
• Finite Element Method'Solidification;
• Thermal Stress;
• Stress Relaxztion;
• Inelastic Strain Rate

• 유한체적법;
• 유한요소법;
• 응고;
• 열응력;
• 응력이완;
• 비탄성 변형도율;