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
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.