Interpretation of the behavior of metals under large plastic shear deformations: comparison of macroscopic predictions to physically based predictions

A large plastic shear problem is analyzed by application of a macroscopic anisotropic plasticity model (Kuroda, M., 1997. Interpretation of the behavior of metals under large plastic shear deformations: a macroscopic approach. Int. J. Plasticity 13, 359-383), and the results are compared to predictions based on crystal plasticity with the Taylor assumption. It is found that these two different-scale models provide very similar predictions. The interpretations for such similarities are pursued in detail. The present macroscopic model reproduces quite well the change in orientation of anisotropy, which is directly predicted in the crystal plasticity analyses as a macroscopic manifestation of texture development. Consequently, the predictions for the rotation of the yield surface by the different-scale models become very similar. It is clearly shown that, in a macroscopic sense, the rotation of the anisotropic yield surface is a main cause of the axial effects in large plastic shear deformation. (C) 1999 Elsevier Science Ltd. All rights reserved.