Figure 2. Thick-wall cylindrical model with applied internal pressure used for the derivation of analytical solutions.

The undeformed configuration is assumed to be unstressed and unloaded; the deformed configuration is obtained after applying an internal pressure p. A, B and R represent the internal wall radius, external wall radius and radial coordinate, respectively, in the undeformed configuration; a, b, and r, represent the internal wall radius, external wall radius and radial coordinate, respectively, in the deformed configuration.