Cylinder stress (axial stress)
A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.
When a cylindrical vessel has closed ends the internal pressure acts on them to develop a force along the axis of the cylinder. This is known as the axial stress and is usually less than the hoop stress.
|σz||Axial stress (Pa)|
|P||The internal pressure (Pa)|
|d||Inside diameter of the cylinder (m)|
|t||Wall thickness (m)|