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preserving original elements while assembling meshes in workbench

preserving original elements while assembling meshes in workbench

preserving original elements while assembling meshes in workbench

(OP)
thank you very much in advance for any help yu could provide.
I'm starting to work with ansys workbench and i'm facing the following problem, I need to assemble 3 diferent meshes together while keeping the original number of nodes and elements of two of them. This meshes were originally exported from MIMICS in .cdb and the third was meshed in workbench starting from a STL file.
The proceidure i'm following:
for the 2 cdb meshes:
1) import into finite element modeler for surface components creation.
2)connect the FEM module to a mechanical model module for each individual mesh.
3)connect those modules to a third one (mechanical model, mesh of the STL file)
4) solve the resulting mechanical model using static structural.

I've tried configuring the geometry import options (compare parts on update,compare parts tolerance) and the selective meshing abilities.

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