*PBSS
The figure below illustrates the effect of this option. This card turns on symmetry boundary conditions (displacement only) on the sides of the substrate when *STLF is used in *PBPA analyses. This card also turns on symmetry boundary conditions (displacement and heat ux) on the sides of the part when *LSRP is used in *AUTM analyses.
Surfaces constrained by *PBSS
Best Practices: It is advised that *PBSS not be used in conjunction with *PPLA, which enables part level plasticity; that could result in overconstraining the part, leading to non-physical results.