Chamfers and Fillets

Corners in the model may result in moment peaks. RSTAB offers two functions by which you can adjust corners using chamfered edges or polygonal fillets. They are available in the Tools menu → Modify Members. Alternatively, you can use the or buttons available in the CAD toolbar (see the image Modeling Tools ).

Functions for Adjusting Corners

Create Angled Corner

The Create Angled Corner function creates a new member in the corner area, cutting the edge at the corner node.

Creating Angled Corner

List of Members

Select the members one after the other in the work window by clicking the mouse, or by entering the member numbers. You can use the button to change the order of the member numbers. The button deletes the member numbers.

Parameters

Two corner types are available in the drop-down list to create the chamfer:

• Both Edges: The first member is shortened by the length L₁, the second member by the length L₂.
• Edge and Angle: The first member is shortened by the length L₁. It is connected to the second member by the angle α. The angle is related to a coordinate system that is oriented clockwise.

Options

If selecting the "Cut members" check box, the projecting lengths of the original members are deleted within the corner area after the chamfer has been created.

The "Delete corner node" option also removes the node at the original intersection.

Create Round Corner

The Create Round Corner function creates a new polygon-like arc at the intersection of two members and rounds out the corner area.

Creating Round Corner

List of Members

Select the members one after the other in the work window by clicking the mouse, or by entering the member numbers. You can use the button to change the order of the member numbers. The button deletes the member numbers.

Parameters

Specify the fillet radius r of the arc to be created between the members.

Options

If selecting the "Cut members" check box, the projecting lengths of the original members are deleted within the corner area after the fillet has been created.

The "Delete corner node" option also removes the node at the original intersection.

The value n below the "Divide arc into segments" check box controls how many straight segments are created when the arc is modeled.