As shown in Fig. 1, the Cauchy stress tensor of a plane stress state at a material point is given as
(image below)
1. Draw its Mohr’s circle;
2. Find all the principal stresses and maximum and minimum shear stresses;
3. The corresponding θp and θs;
4. Use the method of pole to draw the element in the physical space in the principal directions and in the maximum/minimum shear stress directions.
