Symmetry boundary conditions with respect to the global XY plane are applied to the BC edge, as shown by (a) in the following figure:
To compensate for the asymmetric section construction, cyclic symmetry conditions (CP) are applied for coupling degrees of freedom (DOFs) at the AB edge with the corresponding DOFs at the CD edge (shown by (b) in the above figure).
A uniform pressure of 13.79e6 Pa is applied to the inner surface of the vessel.
A uniform temperature of 1000° is applied to the inner surface. A 500° temperature gradient is allowed through the wall thickness, resulting in a temperature of 500° at the outer surface.
The temperature at each base shell layer is specified via the BFE command. See the SHELL281 element documentation for more information about defining layered temperature loading.
Temperatures on the reinforcing fibers are automatically determined according to their locations in the shell elements.