Main Help → All Commands → Explicit Cracks → AltPropagate
The MovePlane
command determines how a crack planes move and whether or not crack surfaces can cross crack planes:
MovePlane (method),<(prevent)>
where
(method)
is 'avg
' to move the crack plane to the midpoint of the top and bottom surfaces or 'cm
' to move the crack plane in the center of mass velocity field. The default method is 'avg
'.(prevent)
is 'yes
' or 'no
' to prevent or allow crack planes crossing the main crack plane. The default setting is 'no
'.(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.(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.cm
' method.MovePlane
command is only allowed for MPM analyses.