Extract internal forces in shell model to apply as external loads

[jbeyer]

Hi,
I have two quad models, model A and model B, where model B is a cut-out section of model A.
In model A I calculate internal forces. Now I want to apply these internal forces at the cutting planes as external loads in model B.

My first idea was to get the nodal forces in model A and then apply nodal loads in model B. It would be a clear and comprehensible approach but unfortunately I can’t find nodal loads as results in the database. There’s membrane forces per node but then I need geometry information from the neighbouring quads to calculate the resultant forces.

The picture shows external loads and the resulting membrane forces per node. I can calculate the nodal forces for the edge nodes with 800 kN/m x 0,005m=4 kN and for the inner nodes with 800 x 0,01m=8 kN but my actual model is of course more complicated and 3D.

Does anyone have an idea what would be the best approach for this?

Best regards
Joachim

[maksim_volodin]

Hi,
In fact you can get nodal forces for quad elements:

[maksim_volodin]

Okay, I see. Here’s an idea: For the support nodes of Model B, extract the displacements and rotations from Model A and apply them as as support displacements and rotations in Model B.
In more scientific words apply Dirichlet boundary conditions instead of Neumann, if I use English terms correctly.