Norton-Hoff model for deformation of growing solid shell of thin slab casting in funnel-shape mold
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in: Journal of iron and steel research international, Jahrgang 29.2022, Nr. 1, 23.03.2022, S. 88-102.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Norton-Hoff model for deformation of growing solid shell of thin slab casting in funnel-shape mold
AU - Vakhrushev, Alexander
AU - Kharicha, Abdellah
AU - Wu, Menghuai
AU - Ludwig, Andreas
AU - Nitzl, Gerald
AU - Tang, Yong
AU - Hackl, Gernot
AU - Watzinger, Josef
AU - Rodrigues, Christian M.G.
N1 - Publisher Copyright: © 2022, The Author(s).
PY - 2022/3/23
Y1 - 2022/3/23
N2 - A funnel-type mold is commonly used to provide necessary clearance for the submerged entry nozzle in the thin slab casting (TSC). The partially solidified shell is subjected to the mechanical deformations, which can lead to the defects formation and, as a results, to a breakout. Traditionally, the results of the flow simulation, performed by the finite volume method (FVM), are fed to the external package for the finite element analysis of stress and strain. A coupled model was assembled using “creeping solid” approach by blending the Norton-Hoff viscoplastic stress for the solidifying shell with the Newtonian viscous stress of the liquid melt. The FVM was used to combine both liquid and solid stress models within a single solver. The iterative procedure based on the improved both side diffusion method was introduced to treat the nonlinear relation between the viscoplastic stress and the strain rate. The modeled shell thickness was verified by previously published breakout measurements and the simulation results. Temperature distribution, obtained during the TSC simulation, dominantly corresponds to the viscoplastic range. Developed numerical approach is robust and has direct industrial application.
AB - A funnel-type mold is commonly used to provide necessary clearance for the submerged entry nozzle in the thin slab casting (TSC). The partially solidified shell is subjected to the mechanical deformations, which can lead to the defects formation and, as a results, to a breakout. Traditionally, the results of the flow simulation, performed by the finite volume method (FVM), are fed to the external package for the finite element analysis of stress and strain. A coupled model was assembled using “creeping solid” approach by blending the Norton-Hoff viscoplastic stress for the solidifying shell with the Newtonian viscous stress of the liquid melt. The FVM was used to combine both liquid and solid stress models within a single solver. The iterative procedure based on the improved both side diffusion method was introduced to treat the nonlinear relation between the viscoplastic stress and the strain rate. The modeled shell thickness was verified by previously published breakout measurements and the simulation results. Temperature distribution, obtained during the TSC simulation, dominantly corresponds to the viscoplastic range. Developed numerical approach is robust and has direct industrial application.
KW - Continuous casting
KW - Improved both side diffusion method
KW - Norton-Hoff model
KW - OpenFOAM
KW - Solid shell
KW - Solidification
KW - Thin slab
KW - Viscoplastic stress
UR - http://www.scopus.com/inward/record.url?scp=85124769064&partnerID=8YFLogxK
U2 - 10.1007/s42243-021-00734-8
DO - 10.1007/s42243-021-00734-8
M3 - Article
AN - SCOPUS:85124769064
VL - 29.2022
SP - 88
EP - 102
JO - Journal of iron and steel research international
JF - Journal of iron and steel research international
SN - 1006-706X
IS - 1
ER -