NairnFEAMPM Icon

MovePlane Command

The MovePlane command determines how a crack planes move and whether or not crack surfaces can cross crack planes:

MovePlane (method),<(prevent)>

where

Notes

  1. For all cracks, the top and bottom surfaces move in their separate velocity fields. The setting for (method) determines only how the crack plane particles move. The two methods are equivalent for well defined cracks, but may give different results is some problems.
  2. Both (prevent) settings are equivalent for well behaved cracks (because surfaces tend to not pass through crack planes). If a simulation has problems tracking surfaces, you can try setting #2 of 'yes' to see how it changes. The 'no' setting is faster because it does not need to check crack surfaces on each time step.
  3. See Explicit MPM Crack references for details on cracks in MPM analyses. None of these papers, however, deal with the issue of how to move the crack plane. The original crack paper mentions only the 'cm' method.
  4. The MovePlane command is only allowed for MPM analyses.