You can create new faces by automatically stitching any gaps between free edges. Stitching gaps allows you to replace small faces, fillets, or chamfers that you previously deleted. The operation to stitch gaps is stored as a feature of the part; therefore, you can use the Model Tree to delete the stitch and revert to the original part. For more information, see “What is stitching?,” Section 69.3.
You can stitch gaps in either manifold parts (parts in which every edge is shared by only one or two faces) or non-manifold parts.
To stitch edges:
From the main menu bar, select Tools
Geometry Edit.
Abaqus/CAE displays the Geometry Edit dialog box.
Tip:
You can also stitch edges using the 
tool, located with the edit tools in the Part module toolbox. For a diagram of the edit tools in the toolbox, see “An overview of editing techniques,” Section 69.2.
From the dialog box, select the Edge category and the Stitch method.
From the warning dialog box that appears, click OK.
If desired, specify a stitch tolerance from the prompt area for the stitching operation. Abaqus/CAE will stitch only gaps smaller than the tolerance value that you specify.
If you want to select the edges for the stitching operation individually, toggle on Pick edges, click mouse button 2, then specify the edges you want to select.
Tip: You can select edges individually, specify an existing set that includes edges, or select edges using the angle method. For more information about selecting geometry in the viewport, see “Selecting objects within the current viewport,” Section 6.2.
If you have editing the part, you should check its validity by clicking mouse button 3 on the part in the Model Tree and selecting Update validity from the menu that appears.
