COMSOL 6.2 - Repairing and Defeaturing

Repairing and Defeaturing

When importing 3D CAD files, the default import settings ensure that the validity of the imported objects is checked, and that defects are repaired when possible. In addition to the checks and repair performed during import, the CAD Import Module provides operations for checking, repairing, and defeaturing 3D geometry objects, and locating overlaps and gaps in imported CAD assemblies.

Operations for Checking and Repairing 3D Objects

Use the operations listed in the table below to check and repair geometry objects and to detect interferences between objects:

Table 2-3: Operations for Detecting defects in and Repairing 3D objects and detecting interferences between 3D Geometry objects.
Icon	Name	Description
	Check	Check CAD objects for faults, for example tolerance issues and invalid entities
	Detect Interferences	Search for interferences, such as intersections, gaps, touches, and containments, between objects
	Repair	Repair defects and remove small details from 3D objects

Operations for Defeaturing

With the defeaturing tools listed in the table below you can search for and delete both small details, such as short edges, small faces, sliver faces, and spikes, and larger details, for example, fillets, chamfers, and cylindrical holes. You can also replace and detach a selection of faces to form 3D objects.

Table 2-4: Operations for Defeaturing 3D Geometry objects.
Icon	Name	Description
	Delete Fillets	Search for and delete fillets
	Delete Holes	Search for and delete holes
	Delete Short Edges	Search for and collapse short edges
	Delete Sliver Faces	Search for and delete slivers faces
	Delete Small Faces	Search for and collapse small faces
	Delete Spikes	Search for and delete spikes from faces
	Detach Faces	Detach faces to form a new object from them
	Replace Faces	Replace faces by growing surrounding faces or creating new faces