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See detailFinite element modelling of an electrostatic painting device
Deliège, Geoffrey ULg; Henrotte, François; Hameyer, Kay

Conference (2002)

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See detailFinite element modelling of composite structures under crushing load
Chiu, Louis N.S.; Falzon, Brian G.; Boman, Romain ULg et al

in Composite Structures (2015), 131

This paper details the theory and implementation of a composite damage model, addressing damage within a ply (intralaminar) and delamination (interlaminar), developed for the simulation of the crushing of ... [more ▼]

This paper details the theory and implementation of a composite damage model, addressing damage within a ply (intralaminar) and delamination (interlaminar), developed for the simulation of the crushing of laminated composite structures. It includes a more accurate determination of the characteristic length to achieve mesh objectivity in capturing intralaminar damage consisting of matrix cracking and fibre failure, a load-history dependent material response, an isotropic hardening nonlinear matrix response, as well as a more physically-based interactive matrix damage mechanism. The developed damage model requires a set of material parameters obtained from a combination of standard and non-standard material characterisation tests. The fidelity of the model mitigates the need to manipulate, or “calibrate”, the input data to achieve good agreement with experimental results. This intralaminar damage model was implemented as a VUMAT subroutine, and used in conjunction with an existing interlaminar damage model, in Abaqus/Explicit. This approach was validated through the simulation of the crushing of a cross-ply composite tube with a tulip-shaped trigger, loaded in uniaxial compression. Despite the complexity of the chosen geometry, excellent correlation was achieved with experimental results. [less ▲]

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See detailFinite element modelling of electrostatic MEMS including the impact of fringing field effects on forces
Boutaayamou, Mohamed ULg; Nair, Harish; V Sabariego, Ruth ULg et al

in Proceedings of the 7th International Conference on Thermal, Mechanical and Multiphysics Simulation and Experiments in Micro-Electronics and Micro-Systems (EuroSimE2006) (2006)

The numerical models describing the behaviour of electrostatically actuated microsystems often disregard fringing fields. However, taking the fringing fields into account is crucial for an accurate ... [more ▼]

The numerical models describing the behaviour of electrostatically actuated microsystems often disregard fringing fields. However, taking the fringing fields into account is crucial for an accurate computation of the electrostatic forces. In this work, the finite element method is applied for modeling electrostatic actuators. The electrostatic force distribution is obtained by locally applying the virtual work method. A micro-beam and a comb drive are considered as test cases. The impact of the fringing field effects on the accuracy of electrostatic forces is shown through 2D and 3D parametric studies. [less ▲]

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See detailFinite element modelling of ion convection by electrostatic forces
Deliège, Geoffrey ULg; Henrotte, François; Deprez, Wim et al

in IET Science, Measurement & Technology (2004), 151(6), 398-402

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See detailFinite element modelling of jointed rocks. Application to tunelling
Charlier, Robert ULg; El Kiri, Mohamed

in Int. Symp. on Assesment and preventin of failure phenomena in rocks engineering, ISMR (1993)

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See detailFinite element modelling of rock drilling.
Charlier, Robert ULg; Pierry, Joelle

in Int. Symp. on Assesment and prevention of failure phenomena in rocks engineering, ISMR (1993)

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See detailFinite element Modelling of Shear Band Localisation and Application to Rock Cutting by a PDC Tool
Pierry, J.; Charlier, Robert ULg

in Proc. EUROCK'94 (1994, August)

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See detailFinite element modelling of stacked thin regions with non-zero global currents
Dular, Patrick ULg; Gyselinck, Johan; Zeidan, Tarek et al

in Compel-the International Journal for Computation and Mathematics in Electrical and Electronic Engineering (2004), 23(3), 707-714

Develops a method to take the eddy currents in stacked thin regions, in particular lamination stacks, into account with the finite element method using the 3D magnetic vector potential magnetodynamic ... [more ▼]

Develops a method to take the eddy currents in stacked thin regions, in particular lamination stacks, into account with the finite element method using the 3D magnetic vector potential magnetodynamic formulation. It consists in converting the stacked laminations into continuums with which terms are associated for considering the eddy current loops produced by both parallel and perpendicular fluxes. Non-zero global currents can be considered in the laminations, in particular for studying the effect of imperfect insulation between their ends. The method is based on an analytical expression of eddy currents and is adapted to a wide frequency range. [less ▲]

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See detailFinite Element Modelling of Strong Electro-Mechanical Coupling in MEMS
Rochus, Véronique ULg

Doctoral thesis (2006)

Detailed reference viewed: 67 (12 ULg)
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See detailFinite element modelling of the competition between shear bands in the early stage of thrusting : Strain localisation and constitutive law influence
Barnichon, Jean-Dominique; Charlier, Robert ULg

in Special Publication - Geological Society of London (1996), 99

Detailed reference viewed: 72 (6 ULg)
See detailFinite element modelling of the induction heating of a moving wire
Henrotte, François; Pahner, Uwe; Deliège, Geoffrey ULg et al

in Compumag, Evian, France, July 2-5, 2001 (2001)

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See detailFinite element modelling of thermo-elasto-plastic water saturated porous materials
Luison, Loris; François, Bertrand ULg; Bortolotto, Roberto et al

Poster (2008)

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See detailFinite element modelling of thermo-elasto-plastic water saturated porous materials
Sanavia, Lorenzo; François, Bertrand ULg; Bortolotto, Roberto et al

in Journal of Theoretical and Applied Mechanics (2008), 38(1-2), 7-34

The purpose of this paper is to present a new nite element formulation for the hydro-thermo-mechanical analysis of elasto-plastic multiphase materials based on Porous Media Mechanics. To this end, the ... [more ▼]

The purpose of this paper is to present a new nite element formulation for the hydro-thermo-mechanical analysis of elasto-plastic multiphase materials based on Porous Media Mechanics. To this end, the ACMEG-T thermo-plastic constitutive model for saturated soils has been implemented in the nite element code COMES-GEO. Validation of the implemented model is made by selected comparison between model simulation and experimental results for di erent combinations of thermo-hydro-mechanical loading paths. A case of non-isothermal elasto-plastic consolidation is also shown. [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 Modelling with Transformation Techniques
Henrotte, François; Meys, Benoît; Hedia, Hakim et al

in IEEE Transactions on Magnetics (1999), 35(3), 1434-1437

Transformation methods are a very powerful tool in finite element modelling. In many cases, an adequate mapping transforms the problem into an easier one or allows advantage to be taken of the symmetries ... [more ▼]

Transformation methods are a very powerful tool in finite element modelling. In many cases, an adequate mapping transforms the problem into an easier one or allows advantage to be taken of the symmetries. This paper demonstrates that any mapping can be handled automatically provided the classical vector analysis approach is given up for the benefit of a differential geometry approach. As a first example, it is shown that axisymmetrical problems need no more a particular treatment provided the mapping of the cylindrical coordinates on the cartesian ones is considered as it is. Furthermore, a novel axisymmetrical formulation is proposed which relies on one further transformation and improves considerably the quality of the interpolated field. Transformation methods are also of great help to model the infinite space by means of finite elements. Many authors have presented such transformations which are often instances of the same general shell transformation that is presented here. [less ▲]

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See detailFinite element models for studying the capacitive behaviour of wound components
De Grève, Zacharie; Dular, Patrick ULg; Sabariego, Ruth V. et al

in Proceedings of COMPUMAG 2015 (2015, June)

Finite element models of increasing accuracy are proposed for the study of the capacitive behaviour of wound magnetic components. Simple models, which are based on the classical assumption of a decoupling ... [more ▼]

Finite element models of increasing accuracy are proposed for the study of the capacitive behaviour of wound magnetic components. Simple models, which are based on the classical assumption of a decoupling between electric and magnetic fields, are first described. Formulations which enable such a coupling are then presented. The models are tested on various coreless inductors, made of round conductors or copper sheets. The results are discussed and compared with experimental data measured with an impedance analyzer. [less ▲]

Detailed reference viewed: 45 (2 ULg)
See detailFinite element models in electrical machine design
Hameyer, Kay; Henrotte, François; Vande Sande, Hans et al

Conference (2002)

Detailed reference viewed: 44 (0 ULg)
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See detailFinite element prediction of the swift effect based on Taylor-type polycrystal plasticity models
Duchene, Laurent ULg; Delannay, L.; Habraken, Anne ULg

in Stören, Sigurd (Ed.) Proceedings of the 7th ESAFORM conference on Materials Forming (2004)

This paper describes the main concepts of the stress-strain interpolation model that has been implemented in the non-linear finite element code Lagamine. This model consists in a local description of the ... [more ▼]

This paper describes the main concepts of the stress-strain interpolation model that has been implemented in the non-linear finite element code Lagamine. This model consists in a local description of the yield locus based on the texture of the material through the full constraints Taylor’s model. The prediction of the Swift effect is investigated: the influence of the texture evolution is shown up. The LAMEL model is also investigated for the Swift effect prediction. [less ▲]

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See detailFinite element simulation of canine humeral condylar fractures
D'Otreppe, Vinciane ULg; Böhme, Béatrice; Balligand, Marc ULg et al

Conference (2011, July 04)

Humeral condylar fractures are common in dogs. Different types of fractures (lateral, medial, bicondylar) may occur, depending on the age of the dog and the position of its elbow during the impact. The ... [more ▼]

Humeral condylar fractures are common in dogs. Different types of fractures (lateral, medial, bicondylar) may occur, depending on the age of the dog and the position of its elbow during the impact. The goal of this work is to understand the effects of bone posture and skeletal development on canine humeral fractures by means of the finite element method. Four distinct finite element simulations were performed, corresponding to an immature and a mature dog elbow, respectively in extension and flexion. To create the finite element models, subject-specific finite element meshes were extracted from the CT-data. Appropriate material properties were used for cortical bone, trabecular bone and cartilage. The modified Mohr-Coulomb failure criterion was implemented to take account for strength asymmetry. Lateral humeral fractures are obtained for both the young and adult dog elbow, in extension and flexion. This is in agreement with clinical observations, in which lateral condylar fractures are most common. [less ▲]

Detailed reference viewed: 81 (13 ULg)
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See detailFinite element simulation of cold roll-forming processes
BUI, Q. V.; Ponthot, Jean-Philippe ULg

in ACOMEN 2005 (2005)

Detailed reference viewed: 31 (1 ULg)