FEM SIMULATION OF THE FORMING OF TEXTURED ALUMINUM SHEETS

Citation
Jg. Hu et al., FEM SIMULATION OF THE FORMING OF TEXTURED ALUMINUM SHEETS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 256(1-2), 1998, pp. 51-59
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science
ISSN journal
0921-5093
Volume
256
Issue
1-2
Year of publication
1998
Pages
51 - 59
Database
ISI
SICI code
0921-5093(1998)256:1-2<51:FSOTFO>2.0.ZU;2-H
Abstract
A texture-based fourth order strain-rate potential was used directly i n an elastoplastic finite element code (ABAQUS) to model sheet metal f orming. The method is based on the Taylor model of crystal plasticity and therefore takes the presence of texture into consideration. The de ep drawing of cold-rolled and annealed aluminum sheet was simulated us ing this code in conjunction with a specially developed UMAT subroutin e. The full geometry of deep drawing, including the disposition of the tools and the effect of friction, was taken into account in the simul ations and both shell and brick elements were employed. The influences of element type, as well as of friction and blank holder force, are d iscussed. The thickness variations induced by deep drawing are also de scribed. Reasonable agreement was obtained between the predicted and m easured earing profiles for an annealed aluminum sheet. The steps to b e followed to bring about further improvements in the accuracy of the simulations are also discussed. (C) 1998 Elsevier Science S.A. All rig hts reserved.