Numerical Modeling of Shrinkage Cavity Formation Process in Cast Steel Support |
| T. Skrzypczak, E. Węgrzyn-Skrzypczak, L. Sowa
Częstochowa University of Technology, 42-201 Częstochowa, Poland |
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| The presented work is focused on the numerical modeling of a solidification process of a support made of cast steel in a permanent mould. The shrinkage cavity formation phenomenon is taken into account due to its importance in the casting process. The formation process of the internal macroscopic voids due to the volumetric shrinkage of the solidifying material is a common and serious concern of the casting process. Governing equations of the mathematical and numerical models are presented. The numerical approach of the considered problem is based on the finite element method (FEM). The algorithm of the shrinkage cavity creation process is described. The numerical procedure of the macroscopic defect formation is based on the recognition of the isolated liquid volumes where the amount of shrinkage is computed in each time step. The recognition is performed by the selection of the interconnected nodes filled with liquid in the finite element mesh. On the basis of the numerical model, an original computer program was made. The numerically obtained location and shape of the macroscopic defects were compared to the shrinkage cavity in the real casting. |
DOI:10.12693/APhysPolA.139.487 topics: solidification, shrinkage cavity, numerical modeling, finite element method |