GiD forum

Hello,

The entity 'surface mesh' is thought to generate mesh on it. As you have
seen, it cannot be exported into IGES. Is it not useful for you to create the
solid inside GiD and work on it? Maybe, the comparation between both
geometrical shapes can be made inside GiD.

Also, it is necessary to note that the meshing of 'surface meshes' can be
problematic for complex geometries.

Best regards,


On Mon, 16 Oct 2000, you wrote:
Hello,

My purpose is to use the "read surface mesh" option and transfert MESH
format into IGES format in order to compare
finite element geometry after distorsions with real geometry.

But I cannot create an IGES file from surface mesh data. In fact when I
read a surface mesh,
the mesh is well converted in points, lines and surfaces geometry entities,
but I can export it immediately in IGES format.
When I try, the IGES file is empty. The solution I have found (todate) is
to delete all the surfaces and create again all the surfaces, but in this
case
the complexity of the geometry (about 15000 surfaces) leads to many holes
on the surface, then it is impossible to generate
the volume (solid).

Do you have another solution to bypass this problem, thank you very much in
advance for your help.

Charles Aliaga.




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Centre Internacional de Mètodes Dr. Ramon Ribó
Numèrics en Enginyeria
http://gid.cimne.upc.es/ramsan ramsan at cimne.upc.es
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E-08034 Barcelona, Spain fax. +34 93 401 65 17

hello

thank you for this message, infact I have send you another one this
afternoon:

copy of second mail:
*************************************************
Hello,

It is not possible for me to create the solid inside Gid, because the solid
is the result of finite
element calcultation with large strain. But Gid is usefull to convert the
mesh discetization into
geometric definition and my objectif is to convert it into an IGES file.
For the moment I have succeeded in converting the file (mesh) into points
or points-lines IGES entities,
but nerver into surface entities. In effect I cannot export the IGES
surface model.


My GOAL rests:


purpose: MESH -------- READ MESH and convert into an IGS
points-lines-surfaces ------------ Compare with SOLID

tool : F.E simulation tool --------- GID --------- Solid 3D
system.
*******************************************************
I have a another question for you:

I am surpised to see that ascii format contain all the
points-lines-surfaces geometry, why IGES is empty ?


thank you again for your help.


Charles Aliaga.





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