Surface defects

If surface defects in the geometry model are not identified and corrected, then they will produce large numbers of defects in the mesh, such as mesh connectivity defects, holes, and overlapping elements. Surface ties are used to identify minor mismatches between surface boundaries.

After importing geometry files such as IGES (*.igs), STEP (*.stp,*.step), Parasolid (*.x_t, *.x_b and so forth), you should perform the following diagnostics on the imported surfaces:

• Surface Boundaries Diagnostic to ensure that all inner and outer surface boundaries form a closed loop.
• Surface Connectivity Diagnostic to ensure that for those surfaces that share a boundary, that these boundaries are fully connected.