Description: Consider a pressure vessel that is made of two half spherical domes with 1 ft in diameter, and the cylinder portion
is 3 ft in length and is subjected to 100 psi pressure. The maximum tensile strength of the material is 55 ksi The factor of safety for this design is 1.5. Problem: Determine the minimum thickness for this design.
The longitudinal stress of the vessel can be calculated as the following:
where p = 100 psi is the internal pressure, t is the wall thickness
The hoop stress can be calculated as the following
As 0.011 > 0.0054 we will pick t = 0.011 as design to withstand the maximum stress. Taking into account of factor of safety design, the appropriate thickness is 0.011*1.5 = 0.016 in