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For a Retransition to a NURBS-Geometry a non-intersected optimisation result is needed. Therefore, the Smooth-Geometry from the Post Processing can be transferred to the model tree. The geometry of this file stays always inside the Design Spaces limits except of the Interface areas, they intentionally exceed the Design Space limits to enable an easy and clean Boolean Intersection.
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If the default conversion option “NURBS” is activated, the Retransition back to a NURBS-Geometry (CAD) runs automatically. In this case it can be continued with Step 3.
If the conversion option “Facet” is activated, the Facet-Geometry is transferred to the model tree.
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Step 2: Mesh to CAD
With the Facet to NURBS Tool in the Geometry Edit Tools the STL-file can be transitioned to a NURBS-Geometry. Therefore, the Automatic Size Calculation and the Partition Preview can stay active. The NURBS Face Density influences the number of patches merged together to one bigger patch. A low density value means that fewer, bigger patches and a high density means that more, smaller patches are created.
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Alternatively, the option “Map LBCs and Material” can be chosen in the “Transfer Design Candidate to pre processing” Button settings. This is automating the process described above but doesn’t stop after the intersection. Additionally LBCs and Material information are mapped to the Design Candidate for a verification with MSC Apex (FE-Renalysis). These extra steps don’t take too much time but all in all the process is running through automatically.
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