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Abstract: Three-dimensional
non-steady aluminum profile extrusion processes with large deformations
are simulated using finite volume method (FVM) based on Euler mesh. The
key technologies are studied and the simulation program is coded using C
langrage to obtain the fields such as velocity field and temperature
field. Volume of fluid (VOF) method is used to cap-ture the free surface
of the material. The “moving grids system” is introduced to treat the
moving problem of the boundaries of the calculated area caused by the
moving of the extrusion ram. The numerical simulation of real physical
processes is realized. The simulation results for an aluminum profile
extrusion process with a L-shaped cross-section obtained by the finite
volume math-ematic model agree with the results simulated by Deform-3D.
And the results of finite volume mathematic model are much closer to the
practical ones. The effectiveness and exactness of the finite volume
model established are proved. The finite volume model is more suitable
to the materials forming process simulation with a large or severe
deformation, such as aluminum profile extrusion process, than finite
element model.
Key words: Euler mesh Finite volume method
Moving grids system
CLC No: TG376
国家自然科学基金资助项目(50375087, 50425517). Received 20060418, received in revised form 20060906
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