Modeling Cracks with ANSYS Maximizing the ROI on your ... - PADT
Modeling Cracks with ANSYS Maximizing the ROI on your ... - PADT
Modeling Cracks with ANSYS Maximizing the ROI on your ... - PADT
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June 18, 2010 The Focus Issue 74<br />
(Bad Geometry, C<strong>on</strong>t...)<br />
face or edge you want removed and <str<strong>on</strong>g>the</str<strong>on</strong>g><br />
program takes it out and heals <str<strong>on</strong>g>the</str<strong>on</strong>g> solid.<br />
Figures 6 through 8 show examples. We<br />
find that this is <str<strong>on</strong>g>the</str<strong>on</strong>g> most efficient and<br />
c<strong>on</strong>trolled way to disfeature a model and<br />
get rid of tiny geometry that is causing<br />
issues.<br />
If, after using <str<strong>on</strong>g>the</str<strong>on</strong>g> tools menti<strong>on</strong>ed above,<br />
you still have <str<strong>on</strong>g>the</str<strong>on</strong>g> bad geometry blues<br />
you can get down and dirty <str<strong>on</strong>g>with</str<strong>on</strong>g> a set of<br />
repair tools that address <str<strong>on</strong>g>the</str<strong>on</strong>g> most comm<strong>on</strong><br />
issues. They can all be found under<br />
Tools-> Repair. The names are pretty self-explanatory. There are tools for removing slivers, spikes, small edges, small faces, seams,<br />
holes, and sharp angled surfaces. Most of <str<strong>on</strong>g>the</str<strong>on</strong>g>m work <str<strong>on</strong>g>the</str<strong>on</strong>g> same way – you can specify a size and any features under that size get cleaned,<br />
or you can pick <strong>on</strong> geometry. The remaining figures show examples of <str<strong>on</strong>g>the</str<strong>on</strong>g> various opti<strong>on</strong>s.<br />
Figure 4: Merge Faces Figure 5: Merge Faces Cleanup<br />
One small side note before we finish, most of <str<strong>on</strong>g>the</str<strong>on</strong>g> opti<strong>on</strong>s available in <str<strong>on</strong>g>the</str<strong>on</strong>g> menu can be displayed as ic<strong>on</strong>s in <str<strong>on</strong>g>the</str<strong>on</strong>g> tool bars if you go to<br />
Tools->Opti<strong>on</strong>s->Toolbars. If you are doing a lot of repairs, we recommend that you add <str<strong>on</strong>g>the</str<strong>on</strong>g> tools you are using to <str<strong>on</strong>g>the</str<strong>on</strong>g> toolbars. Ano<str<strong>on</strong>g>the</str<strong>on</strong>g>r<br />
important thing that users should know is that you can repair geometry and save it as an <str<strong>on</strong>g>ANSYS</str<strong>on</strong>g> ANF file, <str<strong>on</strong>g>the</str<strong>on</strong>g> native file format for<br />
<str<strong>on</strong>g>ANSYS</str<strong>on</strong>g> Mechanical APDL. So even if you are not meshing or pre-processing in Workbench, you can still use this tool to clean up <strong>your</strong><br />
geometry.<br />
After spending years repairing bad geometry we are thrilled to have <str<strong>on</strong>g>the</str<strong>on</strong>g>se tools in our main software product. Removing <str<strong>on</strong>g>the</str<strong>on</strong>g> need to<br />
jump out to o<str<strong>on</strong>g>the</str<strong>on</strong>g>r programs. Take <str<strong>on</strong>g>the</str<strong>on</strong>g> time to learn <str<strong>on</strong>g>the</str<strong>on</strong>g>se tools, when <str<strong>on</strong>g>the</str<strong>on</strong>g>y<br />
work and when <str<strong>on</strong>g>the</str<strong>on</strong>g>y do not, and understanding <str<strong>on</strong>g>the</str<strong>on</strong>g>ir opti<strong>on</strong>s has paid off in<br />
chasing away our bad geometry blues.<br />
Figure 6: Delete Faces to Remove<br />
Fillets<br />
Figure 7: Remove Edges<br />
Figure 8: Remove Faces to<br />
Remove Features<br />
Figure 9: Repair Tools<br />
www.padtinc.com 10 1-800-293-<strong>PADT</strong>
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