Plane stress analysis

Hello!

I am looking for assistance in a "relatively simple" plane stress analysis to be performed on a surface geometry.

Description on my work and the problem:

1. The surface model is imported to Salome(Geometry module) as a STEP 214-file.

2. In the geometry module I created groups of points/lines/faces to support the boundary conditions.

3. In the Mesh module a mesh(mesh_1) was generated on the complete surface geometry. Specifications:
0D, None
1D, Wire discretisation / Avarage lenght=15 / Quadratic mesh.
2D, Triangle (Mefisto) / Length From Edges(2D Hyp. for Triangulator)
3D, None
The mesh was successfully computed without errors!

4. Further on I created Groups of Nodes(under the created mesh_1 in step 3 above), which I choosed to select by Group on geometry. The geometry was picked from the Object browser list(those groups that was created in step 2 above). By the use of "Display only" functions and selection among the created Groups of Nodes I confirmed that the Groups was successfully created!

5. Moving on to Aster module to perform a simple Code Aster Wizard(Linear Elasticity) to be performed on Mesh_1.
The wizard is specified with: Plane stress analysis --> Object to work on Mesh = Mesh_1 --> Material properties = Aluminium (E=70e3 and Poisson´s ratio = 0.3) --> The problem enters when it is time to specify the different Degrees of Freedoms(DOF´s)! After I have choosed the different groups and defined their DOF´s(in the DX and DY field) I wish to press Next and specify the different pressures! That step is not possible, instead a warning comes up that says: "You must at least set up a DOF or a pressure".

I have searched for an explanation in existing tutorials and tried to perform the Aster Wizard on both Geometry and Mesh without success.

Is it possible to define DOF´s and pressures on a plane stress analysis (simple Linear elasticity Aster Wizard) in this way?

Thanks for your response!

Post edited by: Jonas, at: 2008/06/26 15:39<br /><br />Post edited by: Jonas, at: 2008/06/26 15:40

Hello Jonas,

Sorry if this comes very late as a suggestion. I do not use the Wizard, since it has several limitations. I recommend the use of EFICAS since it can handle most cases of analysis (certainly beyond the Wizard)

Regards,
JMB