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A meshless numerical solution of thermo-mechanics of hot-rolled steel bars on a cooling bed [Elektronski vir]Vuga, Gašper ...After the continuous hot-rolling process, steel bars are immediately placed on the cooling bed. At the beginning of the cooling, the material is at high temperatures, and the yield strength is low. ... Due to thermal load, yield strength can be exceeded, and permanent plastic strains start accumulating, resulting in possible unwanted shape changes and residual stresses. The present paper aims to develop a thermo-mechanical model for studying and eliminating undesirable phenomena before the products leave the cooling bed. The governing equations are solved for the two-dimensional slice in a strong form, and a modified version of the radial basis function generated finite difference (RBF-FD) method [1]. The initial bar geometry is obtained from the existing meshless hot-rolling simulation system [2]. The thermal and mechanical models are one-way coupled, i.e. the temperature solution represents a driving force for the stress and strain solution. The temperature field is obtained with explicit propagation in time. The convective and radiative heat fluxes on the boundary are updated at each time step using the ray tracing procedure to determine the radiative heat flux. The mechanical part is solved by considering the small strain elasto-plasticity, where the isotropic von Mises temperature-dependent hardening is employed. The global system of nonlinear equations of the mechanical part is solved by the Newton-Raphson method. The closest point projection method is used to solve the constitutive relations. A sensitivity study is performed on the influence of cooling intensity on a rectangular steel bar’s temperature, stress and strain field. We defined the most influential factors for defect formation. For the first time, a novel meshless RBF-FD method is successfully used for solving such a complex industrial problem. The model will be perspectively upgraded from the slice to the three-dimensional model to enable also bending.Source: Material forming [Elektronski vir] : ESAFORM 2023 : the 26th International ESAFORM Conference on Material Forming : April 19-21, 2023, Kraków, Poland (Str. 1611-1620)Type of material - conference contribution ; adult, seriousPublish date - 2023Language - englishCOBISS.SI-ID - 162681347
Author
Vuga, Gašper |
Mavrič, Boštjan, 1989- |
Hanoglu, Umut |
Šarler, Božidar
Topics
cooling bed |
steel bars |
thermo-mechanics |
strong form |
meshless method |
hladilne klopi |
jekeleni profili |
termo-mehani |
močna formulacija |
brezmrežne metode
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Author | Vuga, Gašper ... |
Title | A meshless numerical solution of thermo-mechanics of hot-rolled steel bars on a cooling bed [Elektronski vir] |
Publication date | 2023-04-19 |
COBISS.SI-ID | 162681347 |
Publication version in repository | Publisher's version |
Publication licence | Creative Commons Attribution 3.0 Unported |
Embargo | Immediate publication for public |
Project(s) from which the publication was funded
Title | Acronym | Project ID | Funder |
---|---|---|---|
Tranzientni dvofazni tokovi (2009-2021) -> Večfazni sistemi (2022-2027) | P2-0162-2022 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
|
Simulacije vročega valjanja za proizvodnjo jekel vrhunskih kvalitet | L2-2609-2020 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
|
Young Researcher’s Program | 39010 | ||
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Vuga, Gašper | 53510 |
Mavrič, Boštjan, 1989- | 36364 |
Hanoglu, Umut | 30833 |
Šarler, Božidar | 04101 |
Source: Personal bibliographies
and: SICRIS
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