References of "Pascon, Frédéric"
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See detailNumerical simulation of the solidification of a beam blank in the mould
Hubsch, P.; Bourdouxhe, M.; Pascon, Frédéric ULg et al

in Proceedings of the 4th European Continuous Casting Conference (2002)

The stability of the casting process and the wear of the mould as well as the quality of the product depend strongly on the mould design. This is particularly true when considering the production of beam ... [more ▼]

The stability of the casting process and the wear of the mould as well as the quality of the product depend strongly on the mould design. This is particularly true when considering the production of beam blanks. If the mould is too tight, thermal contraction can generate considerable contact forces between the product and the mould on the inner surfaces of the flanges. If it is not tight enough, the thermal coupling between the mould and the beam blank is not sufficient to allow the solidification of a skin of the required thickness upon exit from the mould. A finite element model was developed to assist in the mould design. This model takes both the thermal and mechanical interaction between the mould and the product into account. The effect of solidification is implicitly included in the (thermal) finite element formulation while the ferro-static pressure is applied by the means of a specially developed element. The model was applied to a medium gage beam blank cast at ProfilARBED Differdange. The skin thickness as well as the localisation of the wear of the mould predicted by the model are in good agreement with observations made in industrial practice. [less ▲]

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See detailFinite element modelling of thermo-mechanical behaviour of a steel strand in continuous casting
Pascon, Frédéric ULg; Habraken, Anne ULg; Bourdouxhe, Michel et al

in Proceedings of the 7th European Conference on Advanced Materials and processes (Euromat 2001) (2001)

An elastic-viscous-plastic constitutive law (Norton-Hoff type) is coupled to a contact law in a finite element code in order to model the behaviour of a steel strand in the mould of a continuous casting ... [more ▼]

An elastic-viscous-plastic constitutive law (Norton-Hoff type) is coupled to a contact law in a finite element code in order to model the behaviour of a steel strand in the mould of a continuous casting machine. Both thermal and mechanical type fields are computed. The objective is to compare for different industrial process conditions the thickness of the solidified shell as well as the stress and strain levels in this layer. More particularly, the model should lead to optimise the taper of the mould for different cross sections of steel strand. [less ▲]

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See detailFinite element modeling of thermo-mechanical behaviour of a steel strand in continuous casting
Pascon, Frédéric ULg; Habraken, Anne ULg; Bourdouxhe, M. et al

in Habraken, Anne (Ed.) Proceedings of the 4th International Conference ESAFORM (2001)

Surface and internal quality of continuous cast products depends very much upon the behaviour of the strand in the mould. Among the parameters likely to influence this behaviour, the mould taper takes a ... [more ▼]

Surface and internal quality of continuous cast products depends very much upon the behaviour of the strand in the mould. Among the parameters likely to influence this behaviour, the mould taper takes a prominent part. In order to understand better the influence of this parameter, we have build up a thermo-mechanical finite element model. the model includes an elasto-visco-plastic law to describe the behaviour of steel from liquid to solid state, a thermo-mechanical element that takes into account thermal expansion and mechanical behaviour of the strand, a unilateral contact element, a mobile rigid boundary element to model the mould and its taper and an adapted loading element to model the ferrostatic pressure according to the liquid or solid state. [less ▲]

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See detailModélisation des phénomènes thermomécaniques dans une lingotière de coulée continue
Pascon, Frédéric ULg; Habraken, Anne ULg; Bourdouxhe, M. et al

in Mécanique & Industries (2000), 1

Modelling of the thermomechanical phenomena in a mould of continuous casting. The surface and internal quality of continuous cast products depends very much on the behaviour of the strand in the mould ... [more ▼]

Modelling of the thermomechanical phenomena in a mould of continuous casting. The surface and internal quality of continuous cast products depends very much on the behaviour of the strand in the mould during solidification. Among the parameters likely to influence this behaviour, the mould taper takes a prominent part. We developed a thermomechanical 2D model of the strand in the mould using the finite element code LAGAMINE. A slice of the strand is defined perpendicularly to the casting axis with the following boundary conditions: symmetry with principal axes of the section (double symmetry), frictional unilateral contact with the mould surface and imposed mould temperature. The approach uses the generalised plane strain state that allows a variable thickness of the slice in time, and provides one equation for the vertical force equilibrium. The ferrostatic pressure is also taken into account. Due to the mould taper, the geometry of the mould is not constant, but varies as the slice is moving down. The thermal exchange conditions are also modified, depending on contact condition between the strand and the mould. After a two years work, the model is now in checking to predict behaviour of the strand in different cases (shape of the strand cross section, mould taper, etc.). [less ▲]

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See detailThermo-mechanical model of a strand in the mould of a continuous casting plant
Pascon, Frédéric ULg; Habraken, Anne ULg; Bourdouxhe, Michel et al

in Proceedings of the European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2000) (2000)

Surface and internal quality of continuous casts depends very much on the behaviour of the strand in the mould. Among the parameters likely to influence this behaviour, the mould taper takes a prominen ... [more ▼]

Surface and internal quality of continuous casts depends very much on the behaviour of the strand in the mould. Among the parameters likely to influence this behaviour, the mould taper takes a prominen tpart. In order to understand better the influence of this parameter, we build up a thermal-mechanical finite element model. A slice of the strand is modelled and its evolution is observed. The main results are temperature field and solidification evolution, stree, strain and strain rate fields and losses of contact and returns to contact analysis. The model includes an elastic-viscous-plastic law, to describe the behaviour of steel from liquid to solid state, a thermal-mechanical element that takes into account thermal expansion and mechanical behaviour of the strand, a unilateral contact element, z mobile rigid boundary element to model the mould and its taper and an adapted loading element to model the ferrostatic pressure according to the liquid or solid state. This paper presents the first results obtained with an relatively simple section ( a125 mm square billet). Now the model is used with more complex section (beam blanks) and its validation is going on. [less ▲]

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See detailThermomechanical model of the behaviour of a strand in continuous steel casting using finite element method
Pascon, Frédéric ULg; Habraken, Anne ULg; Bourdouxhe, Michel et al

in Proceedings of the 5ème Congrès national belge, Mécanique théorique et appliquée (2000)

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