Boundary System
Many quantities for shells, membranes, and thin layers can best be interpreted in a local coordinate system aligned to the surface. Material data, initial stresses and stress results are always represented in this local coordinate system. The local system for stress output coincides with the orientations defined for the material input.
When a
Boundary System
is selected, the orientation of the local system is fully defined by the boundary system.
When using a boundary system, it also possible to control the orientation of the normal by selecting the
Reverse normal direction
checkbox.