抄録
The purpose of this study is to investigate the relation between the development of anisotropy and the deformation history of pre-deformation by examining the shape of yield surface obtained under large deformation. In a series of our previous reports, using a test piece applying the large pre-deformation of the combined loading of tension and shear, the shape of yield surface has been estimated by investigating the slope of the tangent in the deviatoric stress and deviatoric strain curves. In this paper, the shape of yield surface is examined by conducting the experiment for changing the sequence of tension and torsion in pre-deformation. Especially, the pre-deformation of shear after uni-axial tension is investigated in this report. Then, the relation between the development of the anisotropy of yield surface and the deformation history of the pre-deformation are revealed.
