Q4. The body shown at Figure 1 is acted upon by three orthogonal tensile stresses; i.e., 011, 022, 033. (i) Find the traction vector p (P1, P2, P3) acting upon the section ABC whose normal is the unit vector n with directional cosines (i, u, v) in terms of 011, 022, 033. (ii) Find the principal stresses and the planes. (iii) Find the normal 6) and the shear (T) components (stresses) of the traction vector p acting at the surface ABC in terms of principal stress components. (iv) Assuming that the directional cosines at the section ABC are i = u = v find o and t in terms of principal stress components. Sketch all the identical sections (a = u = v) in the given cube at Figure 1 (use a math editor). 2 633 1 3 Figure 1. Body acted by 3-orthogonal tensile stresses