The strain yield locus of the stressyield criterion was advanced and the strain ellipse method for calculating the limit bulging coefficient was given.
提出应力屈服条件的应变屈服轨迹,给出了复合胀形极限成形系数的解法;
3
In this paper the formula of work of plastic deformation and the 3-dimensions figure of Twin shear stressyield criterion in the plane stress condition are derived.