ULiege - Aerospace & Mechanical Engineering http://metafor.ltas.ulg.ac.be/dokuwiki/ 2026-04-10T11:09:49+00:00 http://metafor.ltas.ulg.ac.be/dokuwiki/ http://metafor.ltas.ulg.ac.be/dokuwiki/_media/logo.png text/html 2024-02-26T16:04:06+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/bck-extrusion?rev=1708963446&do=diff Backward extrusion * A cylindrical piece of metal is pushed through a rigid tool. * A very thin mesh is placed where the solid is supposed to go out. * During the process, this flat mesh grows due to the convection and the main mesh shrinks. text/html 2024-02-26T16:04:59+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/coining?rev=1708963499&do=diff Coining of a cylindrical block * ALE formalism is used for avoiding mesh distortion. * Upper boundary nodes are constantly moved on the free surface to keep the boundary curved shape. * Height of the workpiece is reduced by 60%. * Results must be axisymmetric. text/html 2024-02-26T16:06:07+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/cold-rolling?rev=1708963567&do=diff Cold rolling * Only the interesting part of the problem is meshed, thanks to the ALE formalism. * The mesh is Eulerian in the rolling direction and Lagrangian in the transverse direction. * The stationary state is reached by first clamping the sheet between the rolls and secondly making them rotate around their axis. text/html 2024-02-26T16:07:53+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/dcup-extrusion?rev=1708963673&do=diff Double cup extrusion test * Experimental friction test (Bushhausen /Altan -Ohio State University - 1992). * Mean friction coefficient is deduced from the comparison of experimental and numerical (FEM) “cup height ratios” h1/h2 ( =1 if frictionless). text/html 2024-02-26T16:08:35+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/machining?rev=1708963715&do=diff Machining * A tool cuts and divides a piece of metal into two parts * A guess of the final stationary shape of the chip is used as initial mesh. * The final shape (chip width) is automatically computed by the ALE method * The mesh is refined near the crack. text/html 2024-02-26T13:18:18+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/roll-forming?rev=1708953498&do=diff Roll forming A metal strip is incrementally bent by sets of rolls (called “forming stands”) until the desired cross section is obtained. ---------- Symmetrical U-channel Process parameters * Experimental mill (ArcelorMittal R&D, Montataire, France).$\mu$ text/html 2024-02-26T16:09:46+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/roller-level?rev=1708963786&do=diff Roller levelling Used at the end of the forming line to remove shape defects using plastic bending and stretching. * A sheet is driven through 3 cylinders. * Small contact areas require a fine mesh. * ALE keeps a fine mesh between the cylinders. text/html 2024-02-26T16:14:12+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/thixo?rev=1708964052&do=diff Thixoforming * Semi-solid (SS) thixoforming is a forming process at temperatures located inside the fusion interval. * Combines the advantages of casting and forging. * Introduction of an internal parameter to describe microstructure evolution. text/html 2024-02-26T16:13:07+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/applications/ale/wire-extrusion?rev=1708963987&do=diff Wire extrusion * The ALE formalism is used for simulating this stationary process. * The mesh is Eulerian (every nodes are moved back to their initial position after each step). This avoids to consider a very large Lagrangian mesh. * The problem is axisymmetric.