In the state of uniaxial stress, only one of the principal stresses \(\sigma_1\) is nonzero, \(\sigma_2,\ \sigma_3\) are zero. The geometry used in this case is a 60*30*10 plane with no body force subjected and a constant displacement specified by Dirichlet boundary conditions on left and right boundary. The displacement is set to be -5 on left boundary and 5 on the right boundary. The displacement magnitude decrease from boundary towards the center (Fig. 1).  The von Mises stress (Fig.2) shows yielding would first occur at the conors, however, the result can be artifical due to the boundary conditions. Apart from that, the whole domain shows basically equal  von Mises stress, which is more convicing under isotropic material setting.