For the simple state of pure shear (or torsion), Txy = to and all other stresses are 0. a. Draw the xy element b. Sketch Mohr's circle, in terms of to. c. Determine principal stresses (in terms of to) and draw the principal stress element d. Determine the max shear stress (in terms of to) and draw the ma shear stress element e. Determine the 3rd principal stress and absolute maximum shear stress.