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See detailLagrangian and arbitrary Lagrangian Eulerian simulations of complex roll-forming processes
Crutzen, Yanick ULg; Boman, Romain ULg; Papeleux, Luc ULg et al

in Comptes Rendus Mécanique (2016), 344(4-5), 251-266

The Arbitrary Lagrangian Eulerian (ALE) formalism is a breakthrough technique in the numerical simulation of the continuous-type roll-forming process. In contrast to the classical Lagrangian approach, the ... [more ▼]

The Arbitrary Lagrangian Eulerian (ALE) formalism is a breakthrough technique in the numerical simulation of the continuous-type roll-forming process. In contrast to the classical Lagrangian approach, the ALE formalism can compute the hopefully stationary state for the entire mill length with definitely effortless set-up tasks thanks to a nearly-stationary mesh. In this paper, advantages of ALE and Lagrangian formalisms are extensively discussed for simulating such continuous-type processes. Through a highly complex industrial application, the ease of use of ALE modelling is illustrated with the in-house code METAFOR. ALE and Lagrangian results are in good agreement with each other. [less ▲]

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See detailLagrangian and Arbitrary Lagrangian Eulerian Simulations of Complex Roll Forming Processes
Crutzen, Yanick ULg; Boman, Romain ULg; Papeleux, Luc ULg et al

Conference (2015, July)

Finite element simulation of the roll forming process is regarded as an essential tool for the early design and optimization stages of a roll forming mill. However, such simulations are generally ... [more ▼]

Finite element simulation of the roll forming process is regarded as an essential tool for the early design and optimization stages of a roll forming mill. However, such simulations are generally incredibly time-consuming, limited to some simple cases and to the pre-cut forming method. In contrast to the classical Lagrangian approach, the Arbitrary Lagrangian Eulerian (ALE) formalism, which consists in decoupling the motion of the material and the mesh, can simulate the continuous process for the entire roll forming line at reasonable CPU cost by using a nearly-stationary mesh. In this work, the numerical results are compared to some experimental data on a U-channel in order to validate both Lagrangian and ALE models using our in-house code METAFOR. Furthermore, advantages of the ALE formalism are highlighted with the simulation of a tubular rocker panel on a 16-stand forming mill, which is a real industrial mill. [less ▲]

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See detailSimulations lagrangienne et arbitraire lagrangienne eulérienne du procédé de profilage
Crutzen, Yanick ULg; Boman, Romain ULg; Papeleux, Luc ULg et al

in Actes du 12e Colloque National en Calcul des Structures (2015, May)

L’application du formalisme Arbitraire Lagrangien Eulérien (ALE) à la simulation numérique du procédé de profilage permet de calculer l’état espéré stationnaire du procédé de type continu en modélisant de ... [more ▼]

L’application du formalisme Arbitraire Lagrangien Eulérien (ALE) à la simulation numérique du procédé de profilage permet de calculer l’état espéré stationnaire du procédé de type continu en modélisant de manière efficace l’intégralité de la ligne grâce à un maillage quasi-Eulérien. Ce type de simulation sera comparé à l’approche classique en formalisme Lagrangien dans le cadre d’une application industrielle de profilage. Les performances de la parallélisation de l’algorithme ALE seront analysées dans l’état actuel des développements du code de calcul METAFOR. [less ▲]

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See detailLagrangian and Arbitrary Lagrangian Eulerian Simulations of Stationary and Non-Stationary Roll Forming Processes
Crutzen, Yanick ULg; Boman, Romain ULg; Papeleux, Luc ULg et al

Conference (2014, September)

In industry, cold roll forming is more and more used as a manufacturing process mainly for its high productivity and its close geometric tolerances. However, most of the finite element simulations are ... [more ▼]

In industry, cold roll forming is more and more used as a manufacturing process mainly for its high productivity and its close geometric tolerances. However, most of the finite element simulations are restricted to the sheet to sheet process - the sheet length being smaller than the whole roll forming line - because the numerical models rely on a Lagrangian kinematics that is not very well suited for the forming of long sheets in a reasonable computational time. The Arbitrary Lagrangian Eulerian (ALE) formalism, which consists in decoupling the motion of the material and the mesh, has the capability to simulate the continuous process for the whole roll forming line at reduced CPU cost by optimization of the mesh. In the particular case of roll forming, the mesh nodes are fixed in the rolling direction but are free to move in transverse directions. Taking advantage from this approach, the mesh is only refined in the neighbourhoods of the forming tools for accurate modeling of contact and bending. [less ▲]

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See detailMaterials Selection : Materials for mechanical watches
Vanden Branden, Nicolas ULg; Ernst, Norman ULg; Crutzen, Yanick ULg

Report (2011)

In close relationship with the course of Materials Selection, this report studies the best-suited materials for mechanical watches. To do so, it introduces what are mechanical watches and how they work ... [more ▼]

In close relationship with the course of Materials Selection, this report studies the best-suited materials for mechanical watches. To do so, it introduces what are mechanical watches and how they work. Then, it focuses on existing solutions, from where it looks after new and/or innovative solutions. This, thanks to a computer software (CES) and additional resources. It eventually discusses about all selective criteria to choose from to get the most optimized watch one could. [less ▲]

Detailed reference viewed: 308 (7 ULg)