Soporte al Usuario de COSMOS/™ -- Nota Técnica Nº S12
Why DesignSTAR failed meshing SoildWorks Dome Feature
Productos: COSMOS/Works y COSMOS/DesignSTAR
Versión: Todas las Versiones
Categoría: Preprocesado
Ultima revisión: Agosto-2001
This page try to explain & give technical answer of why COSMOS/DesignSTAR 2.0 failed meshing an IGES part build in SolidWorks99 using the "dome" feature. The original IGES file is ready for download in the following link ButtonHousing.iges (162K).
A quick inspection of the IGES file with CADfix 3.0 using the "diagnostic" utility shows clearly the internal Integrity problems of the IGES part that cause meshing failed in COSMOS/DesinSTAR: degenerated NURBS surfaces, faces partially collapsed, short edges of min. length 0.00209 units, etc..
Model loaded in CADfix 3..0
CADfix was not able to open automaticaly the IGES file like a solid part, so a little additional work was neccesary to fix & repair the geometry. After building automaticaly a valid solid, the model was exported in Parasolid format (*.x_t), load in COSMOS/DesignSTAR, and mesh at default tolerance with high order elements (TETRA10) and "Automatic Mesh Transition ON", see image below:
Model meshed in
COSMOS/DesignSTAR 2.0
Stress & Displacement results on
COSMOS/DesignSTAR 2.0
In summary, IGES is not the best format to interchange geometry, if the part was done in SolidWorks I suggest better to work in SW99 format, and additionaly send files in Parasolid v11 .X_T format, and the very last in IGES format, this will allow a better detection of the meshing problem.
