Ansys SpaceClaim can not produce closed geometry

- June 22, 2023 at 9:38 pm
  
  Reyhaneh
  Subscriber
  
  Hi
  I am PhD student and working with my university license Ansys. I used SpaceClaim to produce Cad geometry from STL files. I could do this for Knee joint bones, femur, tibia, fibula, and patella.
  My target is to make the soft tissue around the knee as a cylinder. how ever SpaceCliam can't make the closed geometry, the error is one single missing face, I tried Facets check, auto fix, fix sharps, holes, stitches, gap, and missing faces. Most of the problems were solved but one face could not be fixed. attache photo
  the program closed a few times as it was trying to fill this missing face.
  Can you help me this problem please.
  Kind regards
  Reyhaneh
- June 23, 2023 at 2:22 pm
  
  Gary Stofan
  Ansys Employee
  
  Hi Reyhaneh
  
  Perhaps try the SpaceClaim Options > File Import Options > STL
  Or, in your source STL program, Is there any way to change the Facet Quality of the original STL?
- June 24, 2023 at 4:11 am
  
  mjmiddle
  Ansys Employee
  
  The Facets check, auto fix, fix sharps, holes, are for the mesh. The stitches, gaps, and missing faces, are for the CAD geometry. Since I assume you are making CAD geometry over the mesh data, the facets check, auto fix, fix sharps, holes may not be useful unless there are large problems in the mesh, and you'll still need to make CAD surfaces over the location. I can see you have created CAD data over the mesh probably using "Tools > Auto Skin" or maybe the manual "skin surface." Can you zoom in and show a picture of the hole in the CAD data? I see the missing face check reported "1 missing face. Click an edge loop to create the missing face." But then when you tried to fix, it reported "Warning, no problem areas were fixed." There should be red highlighted edges somewhere. Maybe the hole edges is not a clear loop, and has overlaps and intersections of the free edge. You may be able to use the manual "skin surface" to create the last surface. Or delete some of the auto-skinned patches around the problem and manually create the skin surfaces in a different configuration that allows you to connect to a closure. Each of these skinned surfaces should be 3 or 4 sided.

Viewing 2 reply threads

You must be logged in to reply to this topic.

Ansys Innovation Space

Boost Ansys Fluent Simulations with AWS

Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.

Earth Rescue – An Ansys Online Series

The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.

Ansys Blog

Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.

Trending discussions