A toroidal shell is formed from a tube of 300 mm diameter and 3 mm thickness. As indicated below the toroidal shell is formed by bending the tube into a circle having an internal diameter of 500 mm and external diameter of 1100 mm. If the fluid pressure inside the toroid is 3 MPa, determine: (a) (b) the three principal stresses on the mid-plane of the shell material at point 'A', where 'A' is that point on the toroidal shell nearest the centreline of the toroid as indicated in the diagram. the primary general membrane stress intensity (average through thickness Tresca stress intensity) at point 'A' (point on shell closest to the centreline of the toroid), and so determine the minimum yield strength of the shell material if that stress if that intensity is not to exceed two thirds of the yield strength. [192.34, 74.25, -1.5, 290.76MPa] 1100$. 500 $ CROSS SECTION ACNO TRICKNESS) 3MG 300