1. The problem statement, all variables and given/known data High strength steel hollow shaft which can withstand complex stresses generated by a combo of loading conditions. Tresca yield criterion is to be used as the basis of design with a factor of safety of 1.5. Shaft is of 50mm and 40mm outer and inner diameters and is subjected to the following loading condition: Torque: 2.5kNm about axis An axial tensile load of 50kN offset vertically by e (15mm) from axis. A bending moment of 3.6kNm acting on vertical plane containing cylinder axis and eccentric load line of action. 1) Determine the sizes of direct and shear stresses acting at point A on the outer surface of the shaft (right through the middle)and mark them on the element. 2. Relevant equations for a hollow shaft I found these equations: J = pi (D^4 - d^4) / 32 tau max = Torque*radius / J, I = pi(D^4-d^4)/64 3. The attempt at a solution I couldn't even get started because I got myself really confused as I was taught and examples I was shown in my lectures only focused on either stress transformation or yield criteria not both at the same time and especially not for hollow objects! I would really appreciate some help here as I've spent days on this and got no where.