[ GiDlist ] Contact surface creation in GiD

[Ramon Ribó Rodríguez]

Hello,

To create a 2D contact the process is:

- Create one side lines and put them in one layer.
- Set another layer as active
- Create another line that exactly duplicates the first one. Points must
be also duplicated (Typically using copy with translation 0 and with
flag 'Duplicate entities' activated).
- Set another layer as active
- Create a contact surface selection the two lines or more at the same
time (if using copy, it has the option 'Create contacts').
- Several element types can be generated in the contact (degenerated
elements):
* 2-noded elements (by defalult).
* No elements (useful to force the same mesh in both sides)
* Quadrilateral elements
- Layer in this process have only been set for viewing and selecting
purposes. In fact, they are not necessary.

If 2-noded elements are meshed, later it is easy in the .bas file to list
them by pairs.

Hope it helps,

On Tue, 05 Sep 2000, you wrote:
Hi, I am using GiD (v5.0 p47) as a pre-processor for an in-house FE program.
I am modelling a 2D problem in which 2 bodies are expected to get in contact
during the analysis, but are intially separated or with interference
(overlapping). The two bodies are defined as planar surfaces bounded by
lines, polylines and arcs.

I can create correctly the surfaces and its meshes. However, when I want to
create contact surfaces (using Geometry-Create-Contact-Surface) the
contact surfaces are not created: after selecting a series of lines I obtain
the message "Created 0 new contact surfaces. Can continue (ESC to leave)".
What I really need is the list of nodes for the lines that I will define as
my contact surfaces, ordered by pairs (target-contactor). I will have
tipically 25/30 contact pairs (target-contactor) per analysis, and I would
prefer to generate this information automatically, and not going to the
specfied surfaces AFTER the meshing and listing the nodes. Is this possible?

Thank you very much,

Andrea Assanelli
Senior Research Engineer
CINI/FUDETEC
Buenos Aires
ARGENTINA
--
Centre Internacional de Mètodes Dr. Ramon Ribó
Numèrics en Enginyeria
http://gid.cimne.upc.es/ramsan ramsan at cimne.upc.es
C/ Gran Capitan s/n,
Modulo C1, Campus Norte UPC, tel. +34 93 401 74 03
E-08034 Barcelona, Spain fax. +34 93 401 65 17