고체역학 (Gere) — Applications of Plane Stress: Problem 8.2-4

8.2-4 Solve the preceding problem if the internal pressure is 3.85 MPa, the diameter is 20 m, the yield stress is 590 MPa, and the factor of safety is 3.0. (a) Determine the required thickness to the nearest millimeter. (b) If the tank wall thickness is 85 mm, what is the maximum permissible internal pressure? Context from preceding problem (8.2-3): A large spherical tank contains gas. The tank diameter is given as an inside dimension and the internal pressure is gage pressure.