Dear Ansys Gurus,

I have a surface geometry given to me as a set of faceted triangles.  Perfect for the faces of some 3D tet elements.    My brain fart is I don't know - in classic al Ansys  (ADPL)  how to throw some more surfaces in there to make a volume I can tet mesh.  The other surfaces will be interior to the part and will be the cut boundaries for a CBDOF submodel - so they can be a bit arbitrary as far as size and shape.

At this time we are trying to morph and existing stress model with the surface definition, but the existing mesh isn't really fine enough to capture the stress concentrations of this newly defined surface.

Any ideas?

Dan Bohlen
Senior Engineer, Stress Analysis
STAR review chairman, Cold Structures, Mounts
GE Aircraft Engines
1 Neumann Way
Evendale, OH  45215  USA

Build B90 Col. H5  cube BK35-251
M/D H358  Cell  513-917-3402

Building 200 Col. G3  cube BC088  Desk Phone 3-8816

"In God we trust, all others bring data." W Edwards Deming

Sorry, not APDL:

Can you slice-and-dice the tessellated surfaces in SpaceClaim then stitch into a solid sub-model?  SpaceClaim also has a tool "Skin Surface" that will extract a smooth surface from a faceted surface.  It would require hand-editing the geometry, but either method would provide you with a solid, smooth sub-model for the CBDOF.  Not easy to integrate into an automated pipeline, but OK for a 1-off type analysis.

Aaron C. Caba, Ph.D.
Sr. Principal R&D Engineer II
BAE Systems, Inc. | Ordnance Systems, Inc.

E-mail: aaron.caba@baesystems.com | Mail:  4050 Peppers Ferry Road, Radford VA 24143-0100
www.baesystems.com

-----Original Message-----
From: Bohlen, Dan (GE Aviation, US) dan.bohlen@ge.com
Sent: Monday, May 9, 2022 7:14 AM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Subject: [Xansys] Putting a mesh on triangle faceted surface

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Dear Ansys Gurus,

I have a surface geometry given to me as a set of faceted triangles.  Perfect for the faces of some 3D tet elements.    My brain fart is I don't know - in classic al Ansys  (ADPL)  how to throw some more surfaces in there to make a volume I can tet mesh.  The other surfaces will be interior to the part and will be the cut boundaries for a CBDOF submodel - so they can be a bit arbitrary as far as size and shape.

At this time we are trying to morph and existing stress model with the surface definition, but the existing mesh isn't really fine enough to capture the stress concentrations of this newly defined surface.

Any ideas?

Dan Bohlen
Senior Engineer, Stress Analysis
STAR review chairman, Cold Structures, Mounts GE Aircraft Engines
1 Neumann Way
Evendale, OH  45215  USA

Build B90 Col. H5  cube BK35-251
M/D H358  Cell  513-917-3402

Building 200 Col. G3  cube BC088  Desk Phone 3-8816

"In God we trust, all others bring data." W Edwards Deming

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