Thanks for your assistance. In the attached pdf file you can see my proceeding. To get the deformed mesh is o.k.
Do you know how I can get the deformed polygon geometry and how I can write back this deformed geometry to the CAD NX Modeling Tool.
Dear Franz, You can use the Face from Mesh command (located in the Model CleanUp menu) to create a new polygon face from a either selected set of 2D elements or 3D element faces. The elements you select to create the new face become the initial mesh on that face. You can then make modifications to the new face or its associated mesh.
The Face from Mesh command is helpful when you need to:
Associate an existing finite element model to new geometry. Connect shell meshes that are not associated to any geometry. Locally refine a region of a mesh that is not associated to any geometry.
You can later modify the mesh on that face. For example, you could use the 2D Mesh command to regenerate the entire mesh on that face, or you could use the 2D Local Remesh command to refine a subset of those elements.
Face from mesh only operates on meshes that aren't associated with geometry. That's not the case with your model. NX does support deformation of sheet body geometry using the Global Deformation command in Modeling. There are tricks to get it to work on solid body geometry too. The command is based upon 2 files containing point location data (i.e. undeformed and deformed nodes in the CAE context).
Typically one would deform a copy of the geometry that was used to create the mesh, but you can deform the original geometry as well. I've attached a 1 slide PPT that describes the command. It has a link to an AVI that I can't attach but I can provide it to you via FTP if you are interested.
The Global Deformation command requires an advanced freeform license. In certain instances it requires a die engineering license too, but that requirement is being removed in future versions. If you are unable to run the command, contact GTAC for a demo of it and go from there.