*FSUB
This card applies displacement boundary conditions on the substrate of part scale powder-bed analyses to simulate rigid fixturing during deposition and release from the machine during cool down.
The figure below depicts the use of the *FSUB card. During deposition only the z coordinate at the bottom side of the substrate is fixed and the x and are free, except for a circular region at the center of substrate with a radius equal to the largest element size. During the cooling time increment, the z coordinate is released to simulate removal of the substrate from the machine. When the *FSUB card is used, the *PBSS card is ignored.
BCs assigned by *FSUB
Best Practices
*FSUB is most accurate when simulating an entire build plate, as if just a small part and the build plate directly below is being modeled, the applied boundary conditions are not truly representative of the physical process of bolt removal. When using *FSUB, part scale plasticity should be enabled.