1. The problem statement, all variables and given/known data Hi, this is my first time posting so I hope you can see the attachment. 2. Relevant equations Hoop stress = pr/t Longitudinal stress = pr/2t 3. The attempt at a solution I am stuck on part a), afterwards I think I should be fine. I am guessing you can "add" axial stresses induced by the 30kN force...but I'm not sure? In this case I have: Circumferential stress = pr/t = 26.25MPa [Tension] Longitudinal stress = pr/2t - 2 * (F/A) = -285.29Mpa. [compression] The longitudinal stress is large which leads me to believe I have done something wrong. Any help or clarification would be greatly appreciated.