The Mesh to CAD functionality is transitioning the optimisation result from an STL-file (Facet-Geometry) back into a NURBS-Geometry. Therefore, a surface quad mesh is modelled on the optimisation result geometry and patches for bigger planar surfaces are merged intelligently.
The Retransition should be performed on a non-intersected, smooth optimisation result. The geometry of this file always stays within the Design Space limits except for the Interface areas, they intentionally exceed the Design Space limits to enable an easy and clean Boolean intersection. After the Retransition the intersection with the Design Space should be done to create all functional surfaces and sharp edges.
For this the Smooth-Geometry can be transferred from the Post Processing to the model tree with the transfer-button.
If the NURBS conversion is activated, the Retransition to a NURBS-Geometry (CAD) runs automatically. If the Facet conversion is activated, the Retransition can be executed manually with the Facet-to-NURBS Tool.
The resulting NURBS-Geometry can be manipulated by MSC Apex (Generative Design) or any CAD software and ensures and simplifies the continuing workflow.
For a direct FE-Reanalysis the Map LBC and Material function can be activated. More information here.
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