Abstract
In this study, plastic anisotropy of typical preferred orientations appeared in textured aluminum and its alloy sheets is predicted according to the finite strain analysis where slip deformation is treated as simple shear. The obtained results are summarized as follows: 1) There exist the orientations of which the plastic anisotropy parameter, r is impossible to be fixed immediately after yielding. This is a logical conclusion in consideration of the yield locus. 2) The r values of the main retained-texture components, {011}<211>, {123}<634> and {112}<111>, vary with tensile strain. Especially, r45 of the {011}<211> and {112}<111> components depends largely on tensile strain. 3) The retained-texture components show maximum r values more than unity in 45° direction. In contrast, the cube component has a minimum in the same direction. 4) The r0 and r90 values of textured aluminum and its alloy sheets show little dependence on tensile strain, while the strain dependence of r45 is large. Such a trend is in good agreement with the experimental results.
