A graphical description of shear stress in the drawing of a thin-wall tube with a conical die

According to the mathematical description of the value of shear stress, the regularity of the variation of the shear stress at one point and its figure in three-dimensional space is presented. At the same time, the relationship between the Lode parameter and the shape of the figure of the shear stress in three-dimensional space is described. In addition, the shear-stress figures corresponding to the different positions of the thin-wall tube in the drawing process are also given.