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See detailNumerical Modelling of the Forging Process of Rolls for Rolling Mills
Castagne, S.; Charles; Habraken, Anne ULg et al

in Proceedings of the 2nd International Conference on forging and related technology (2000, April)

Detailed reference viewed: 17 (0 ULg)
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See detailNumerical modelling of the forging process of rolls for rolling mills
Charles, J.-F.; Castagne, Sylvie; Zhang, Lihong ULg et al

in Pietrzyk, M.; Kusiak, J.; Majta, J. (Eds.) et al Proceedings of the 8th International Conference on Metal Forming (2000)

This article presents comparisons of forging processes between two flat tools, between two round tools, and at different forging temperatures. Simulation results help to recover and better understa,d long ... [more ▼]

This article presents comparisons of forging processes between two flat tools, between two round tools, and at different forging temperatures. Simulation results help to recover and better understa,d long practice in the forging industry. [less ▲]

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See detailNumerical modelling of the forging process of rolls for rolling mills
Charles, J. F.; Castagne, S.; Zhang, Lihong ULg et al

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

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See detailNumerical modelling of the hydrogeological and geomechanical behaviour of a large slope movement: The Triesenberg landslide (Liechtenstein).
François, Bertrand ULg; Tacher, Laurent; Bonnard, Christophe et al

in Canadian Geotechnical Journal (2007), 44(7), 840-857

Using advanced hydrogeological and geomechanical finite element modelling, it has been possible to model the mechanical behaviour of a large slope movement, the Triesenberg landslide. This slope is ... [more ▼]

Using advanced hydrogeological and geomechanical finite element modelling, it has been possible to model the mechanical behaviour of a large slope movement, the Triesenberg landslide. This slope is located along the Rhine valley in the Principality of Liechtenstein and covers an area of around 5 km(2), which includes two villages. Pore-water pressure fields calculated by the hydrogeological model were used as input for the geomechanical model. The results obtained through numerical simulation agree fairly well with field measurements of peak velocity, spatial and temporal distribution of velocity, and total displacements. Such results were obtained using a modified Cam-Clay elastoplastic constitutive model for which the required material parameters were obtained through careful geotechnical tests. These finite element models were carried out in two and three dimensions to gradually improve the understanding of the physical phenomena governing the hydrogeological conditions and the movements of the slope. [less ▲]

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See detailNumerical modelling of the photorefractive effect in II-VI semiconductors
Nguyen, Ngoc Duy ULg; Schmeits, Marcel

Poster (2000)

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See detailNumerical modelling of the photorefractive effect in II-VI semiconductors
Nguyen, Ngoc Duy ULg; Schmeits, Marcel

Poster (1999)

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See detailNumerical modelling of the resaturation of swelling clay with gas injection
Gerard, Pierre ULg; Radu, Jean-Pol ULg; Talandier, Jean et al

in Alonso, Edouardo; Gens, Antonio (Eds.) Unsaturated Soils (2010)

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See detailNumerical modelling of the thermo-hydro-chemical (THC) coupled processes of underground coal seam fire
Liu, Xing Feng; Collin, Frédéric ULg; Buzzi, Olivier

Conference (2013)

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See detailNumerical modelling of the upwelling processes: application to the Moroccan southern coast
Elmoussaoui, Abdellali; Djenidi, Salim ULg; Beckers, Jean-Marie ULg et al

in Chagdali, M. (Ed.) Hydrodynamique Marine - Calculs et Expérimentation (1997)

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See detailNumerical modelling of thin-walled stainless steel structural elements in case of fire
Lopes, N.; Vila Real, P.; Simoes da Silva, L. et al

in Kodur; Tan (Eds.) Proceedings of the Fifth International Conference Structures in Fire (2008)

In this paper, numerical tests made in stainless steel thin-walled elements, using the program SAFIR, will be presented. In order to make these simulations, two main changes in SAFIR were made: i) the ... [more ▼]

In this paper, numerical tests made in stainless steel thin-walled elements, using the program SAFIR, will be presented. In order to make these simulations, two main changes in SAFIR were made: i) the program was changed in order to deal with the stainless steel 2D material properties to be used with shell elements and ii) the possibility of the program to take into account residual stresses in shell elements was introduced. The stainless steel stress-strain relationship at high temperatures, was based on the one presented in part 1.2 of Eurocode 3 [1], which has no initial linear branch as the case of carbon steel. The hardening rule to be used on the shell element formulation could not be exactly established without an approximation of the Eurocode 3 constitutive law [1]. Due to the fact that the SAFIR procedure to take into account the residual stresses consists in transforming them first into residual strains and adding them after to the other initial strains [2], it was necessary to implement a procedure that took in consideration the nonlinearity of the material stress-strain relationship. The paper shows the influence of the residual stresses on the ultimate load bearing resistance of thin-walled stainless steel structural elements in case of fire. [less ▲]

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See detailNumerical Modelling of Thin-Walled Stainless Steel Structural Elements in Case of Fire
Lopes, Nuno; Vila Real, Paulo; Simoes da Silva, Luís et al

in Fire Technology (2010), 46(1), 91-108

In this paper, the structural response of stainless steel thin-walled elements submitted to fire is analysed numerically by means of the geometrically and materially non-linear Finite Element program ... [more ▼]

In this paper, the structural response of stainless steel thin-walled elements submitted to fire is analysed numerically by means of the geometrically and materially non-linear Finite Element program SAFIR, including imperfections. In order to make these simulations, two main changes in the program were made: (i) the code was changed in order to deal with the stainless steel 2D material constitutive law to be used with shell elements and (ii) the possibility of the program to take into account residual stresses with shell finite elements was introduced. The stainless steel stress–strain relationship at high temperatures was based on the one presented in part 1.2 of Eurocode 3. To model the strain hardening exhibited by the stainless steels, using the shell element formulation, an approximation to the Eurocode 3 constitutive law was needed. Local and global geometrical imperfections were considered in the simulations. The paper shows the influence of the residual stresses on the ultimate load-carrying capacity of thin-walled stainless steel structural elements in case of fire. [less ▲]

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See detailNumerical modelling of timber connections under fire loading using a component model
Cachim, Paulo B.; Franssen, Jean-Marc ULg

in Fire Safety Journal (2009), 44

This paper describes a component model for dowelled timber connections under fire loading. The component model of the dowelled connection is first developed and calibrated for room temperature. The ... [more ▼]

This paper describes a component model for dowelled timber connections under fire loading. The component model of the dowelled connection is first developed and calibrated for room temperature. The constitutive relations for dowel–timber interaction are detailed and compared with experimental results. In the fire situation, a two-step approach is used: first, three-dimensional (3D) thermal analysis of the connection is performed using a conductive model with timber properties defined in Eurocode 5 in order to calculate the temperatures in the fasteners and timber; afterwards, the mechanical analysis using a component model is carried out using mechanical properties of the steel dowel and of timber adjusted to the temperatures obtained by the thermal analyses. These properties are reduced according to Eurocode 3 and Eurocode 5, respectively. Numerical simulations are presented that allow evaluation of the model behaviour and performance. Obtained results show good agreement with available experimental data, indicating that regardless of its simplicity, the component model has the capability to accurately model timber connections under fire loading [less ▲]

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See detailNumerical modelling of transient flows with high sediment concentrations
Dewals, Benjamin ULg; Erpicum, Sébastien ULg; Pirotton, Michel ULg

in DE WRACHIEN, D. (Ed.) Monitoring, Simulation, Prevention and Remediation of Dense Debris Flows II (2008)

The main purpose of the present paper is to describe and discuss the development, validation and application of a numerical model designed to handle transient flows with high sediment transport rates. The ... [more ▼]

The main purpose of the present paper is to describe and discuss the development, validation and application of a numerical model designed to handle transient flows with high sediment transport rates. The model considers non-equilibrium transport (i.e. accounting for loading / unloading delay) and is numerically as well as physically totally coupled. The closure relations needed to evaluate the exchange fluxes between the fixed bottom and the flowing mixture (erosion and deposition rates) are also detailed in the paper. Finally, the model is validated against experimental data collected in the framework of the European project IMPACT. [less ▲]

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See detailNumerical modelling of two-way reinforced concrete slabs in fire
Lim, Linus; Buchanan, Andrew; Moss, Peter et al

in Engineering Structures (2004), 26(8), 1081-1091

This paper describes numerical modelling of the fire behaviour of two-way reinforced concrete slabs using a special purpose non-linear finite-element program, SAFIR. Several two-way reinforced concrete ... [more ▼]

This paper describes numerical modelling of the fire behaviour of two-way reinforced concrete slabs using a special purpose non-linear finite-element program, SAFIR. Several two-way reinforced concrete and composite steel-concrete slabs are tested under exposure to the ISO standard fire in order to validate the shell finite element in the SAFIR program. The modelling results showed agreement with the fire tests and demonstrate that the SAFIR shell element can be used to predict tensile membrane behaviour of two-way reinforced concrete slabs in fire conditions. The analyses show that two-way slabs have excellent fire resistance if they deform in double curvature and develop tensile membrane action. (C) 2004 Elsevier Ltd. All rights reserved. [less ▲]

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See detailNumerical modelling of weathering at the catchment scale
Godderis, Y.; François, Louis ULg; Probst, A. et al

in Geochimica et Cosmochimica Acta (2004), 68(11), 425-425

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See detailNumerical modelling with Wolf2D of the sedimentation problem at the entrance of a lock on the river Meuse
Khuat Duy, Bruno ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Dick, Erik; Hogge, Michel; Van Keer, Roger (Eds.) Proceedings of the 3rd International Conference on Advanced Computational Methods in Engineering (2005)

This paper presents the resolution of a practical hydraulic engineering problem thanks to effective numerical tools. A sedimentation study of the lock of Hun (river Meuse, Belgium) is completed using ... [more ▼]

This paper presents the resolution of a practical hydraulic engineering problem thanks to effective numerical tools. A sedimentation study of the lock of Hun (river Meuse, Belgium) is completed using solid transport models integrated in a finite volume free surface flows solver. The silting of the lock entrance is successfully modelled and various layout modifications of the site are tested to predict their effects and to see to what extent they could improve the actual situation. The analysis of the results shows that a regular dredging of the lock entrance is ineluctable. [less ▲]

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See detailNumerical Optimization Methods for Large Scale Problems
Fleury, Claude ULg

Conference given outside the academic context (2007)

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See detailNumerical optimization of an injection volumetric expander for use in waste heat recovery organic Rankine cycle
Declaye, Sébastien ULg; Quoilin, Sylvain ULg; Lemort, Vincent ULg

in Proceedings of the 7th International Conference on Compressors and their Systems (2011, September 05)

Waste heat recovery organic Rankine cycle (ORC) systems allow generating mechanical or electrical power from local low grade heat sources. This paper shows how the power produced by the system can be ... [more ▼]

Waste heat recovery organic Rankine cycle (ORC) systems allow generating mechanical or electrical power from local low grade heat sources. This paper shows how the power produced by the system can be increased by achieving several evaporating pressure levels and injecting low pressure flow during expansion. A numerical model of the vapour injection expansion is developed and different system configurations are compared. In comparison with a simple configuration of the cycle, vapour injection configuration yields a maximum increase of 16% of the power production. Moreover, the specific power can be increased by 26%, which would largely reduce the specific investment cost of the waste heat recovery system. [less ▲]

Detailed reference viewed: 266 (12 ULg)