[ GiDlist ] Contact Surface

[Enrique Escolano]

Basically I got two possible answers to create a kind of contact line.
But, I'm not sure yet about all three recommendations. Followings are
each answers from you and my additional question.

1. Create the null line using the two nodes which have the same geometric
location and allocate the condition to identify the null line. In this
case, how do I create the null line? And can I allocate the material on
the null line?


The line can be created simply selecting to the points writing its numeration (label). The labels can be visualized (see View-Label-All or Utilities-List-Lines/Points ).
An material or condition can be assigned over this line (pick in screen or enter line label)

2. Create the master and slave nodes using condition. In this case, how do
I select the master and slave node from gid window since there are in same
geometric location? Do I need to use layer concept for this? Or can I
define those in *.cnd file? And Can I allocate the material to this even
though I don't have the physical element inside Gid. Could you please give
me more detailed information for this case?


You can select superposed entities, separating in layers, or writing the label number.
The properties (friction coefficient, etc) can be allocated in a field of the condition master or slave,
the template of the conditions are defined in the file *.cnd of the problem type.
This condition must be considered as a link between two nodes (similar to a element)

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