Gašper Vuga (Author), Tadej Dobravec (Author), Boštjan Mavrič (Author), Božidar Šarler (Author)

Abstract

This study presents a new strong-form meshless method to solve the thermo-mechanical problem of the solidification process in the continuous casting of steel. A two-dimensional slice that travels in the casting direction is modelled in the Lagrangian system. The newly developed mechanical model is one-way coupled to the thermal model, where the heat flux due to the mould, sprays, rolls and radiation are imposed to solve heat transfer in the strand. The resulting temperature and metallostatic pressure govern the Norton-Hoff visco-plastic model used for computing shrinkage of the solid shell and induced residual stresses. The results are used to estimate critical areas susceptible to hot-tearing formation. The mechanical model uses a generalised plane strain assumption that includes linear strains perpendicular to the slice and enables the computation of the straightening of the strand. The thermo-mechanical model is spatially discretised with a local radial basis function collocation method (LRBFCM). The mechanical part includes a new hybrid method that combines LRBFCM with finite differences for increased stability. The presented work shows how the developed model is used to assess the impact of casting velocity on the solid shell shrinkage and the probability of hot-tearing occurrence in the continuous casting of square billets.

Keywords

kontinuirano ulivanje jekla;termo-mehanika;močna formulacija;brezmrežne metode;continuous casting of steel;thermo-mechanics;strong form;meshless methods;

Data

Language: English
Year of publishing:
Typology: 1.08 - Published Scientific Conference Contribution
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 519.62:621.74
COBISS: 199016963 Link will open in a new window
ISSN: 1742-6596
Views: 412
Downloads: 55
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Other data

Secondary language: Slovenian
Secondary keywords: kontinuirano ulivanje jekla;termo-mehanika;močna formulacija;brezmrežne metode;
Type (COBISS): Article
Pages: str. 1-6
Issue: ǂVol. ǂ2766, [article no.] 012201
Chronology: 2024
DOI: 10.1088/1742-6596/2766/1/012201
ID: 24373186