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Blocking the displacement along Z<0 only

Blocking the displacement along Z<0 only

Blocking the displacement along Z<0 only

(OP)
How can i block the displacement of a surface along Z<0 only and tolerate it along Z>0?
As i know, this cant be done in boundary conditions...
is self contact the only way or there is an easier way?

Thank u all

RE: Blocking the displacement along Z<0 only

I would make a rigid plane and apply contact.

Rob Stupplebeen

RE: Blocking the displacement along Z<0 only

(OP)
Is there no easier way?????????????

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