Translations:FEM Geometry Preparation and Meshing/15/en

From FreeCAD Documentation

The geometry used for FEM has to be valid. Most importantly, there can't be any intersections. It's a common issue often occurring when assemblies are modeled without proper constraints between the parts. The Part SectionCut tool can help find such interferences between parts. Of course, Part Fuse may help resolve them if they are intentional. Other issues with the geometry (such as non-manifold geometries, redundant edges or faces and so on) also have to be fixed before proceeding to meshing. The Part CheckGeometry tool can be helpful but visual checks are also important. When preparing a simulation using solid elements and in doubt whether the part is really solid or just a closed shell, the aforementioned tools (Part SectionCut and Shape Content tab of the Part CheckGeometry tool output) may clarify this.