Chamfer
To chamfer corners in 3D geometry objects, from the Geometry toolbar, Editing () menu, select Chamfer (). You can also right-click the Geometry node to add this node from the context menu.
Edges
Select the edges that you want to chamfer in the Graphics window. They then appear in the Edges to chamfer list. If the geometry sequence includes user-defined selections above the Chamfer node, choose Manual to select edges, or choose one of the selection nodes from the list next to Edges to chamfer.
Click the Activate Selection button to toggle between turning ON and OFF the Edges to chamfer selections.
To automatically extend the selection to tangent edges select the Group by continuous tangent checkbox (cleared by default). Modify the Angular tolerance to control which edges are added to the selection. Values between 0 and 180 degrees are supported (default: 5 degrees).
Radius
Enter the Radius of the chamfer. The size of the chamfer is determined by rolling a ball of the given radius so that it is tangent to the faces that are adjacent to the edge. The chamfer surface is generated by the line segment that connects the points of tangency.
Options
Select or clear the following checkboxes as needed.
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If the Propagate to tangent edges checkbox is selected, the chamfer is propagated to edges that have continuous tangent to the edges selected in Edges to chamfer.
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If the Preserve overlapped entities checkbox is selected, geometric features such as holes and bosses on faces that are overlapped by the chamfer surface are preserved.
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Select the Y-shaped chamfer checkbox to get a y-shaped chamfer at a vertex where three or more edges meet and there are two chamfer surfaces of different convexity. In some cases, using this option is necessary for the operation to succeed.
Selections of Resulting Entities
If you want to make the resulting entities contribute to a cumulative selection, select a cumulative selection from the Contribute to list (the default, None, gives no contribution), or click the New button to create a new cumulative selection (see Cumulative Selections in the COMSOL Multiphysics Reference Manual).
Select the Resulting objects selection checkbox to create predefined selections (for all levels — objects, domains, boundaries, edges, and points — that are applicable) in subsequent nodes in the geometry sequence. To also make all or one of the types of resulting entities (domains, boundaries, edges, and points) that the resulting objects consist of available as selections in all applicable selection lists (in physics and materials settings, for example), choose an option from the Show in physics list: All levels, Domain selection, Boundary selection, Edge selection, or Point selection. The default is Domain selection, which is suitable for use with materials and physics defined in domains. For use with a boundary condition, for example, choose Boundary selection. These selections do not appear as separate selection nodes in the model tree. Select Off to not make any selection available outside of the geometry sequence.
Assigned Attributes
From the Construction geometry list choose On to make the resulting objects available only in the feature’s geometry sequence. The default option Inherit from input means that the resulting objects become construction geometry if all input objects are construction geometry. Choose Off to never output construction geometry objects. For more information see in the COMSOL Multiphysics Reference Manual.