A steel pipe is 200mm internal diameter and 20mm thick. Calculate the safe internal pressure if the allowable stress is not to exceed 140Mpa.
σr = A-B/r^2[/B]
σtheta = A+B/r^2
The Attempt at a Solution
Right so, I've got two equations.....
(eq2)0 = A-B/0.12^2
I need help getting A and B. Answers (A=57.38)and (B=0.826)
I know I need to use simultaneous equations. Could someone please give me a step by step solution as I'm stuck.
I have so far done -(eq2)+(eq1) to cancel out A.
...140MPa = B/0.1^2 + B/0.12^2
I'm not sure what to do next to get B.