Week 8-3D Tetra Meshing Challenge

Aim- To generate tetra mesh for the component using 2d to 3d conversion method.

Quality parameters -

Model 1

• Min size - 2 Units
• Max. Size - 7 Units
• Target element size - 5 Units
• Tet Collapse - 0.15 Units

Procedure -

• Import the geometry using the import option in Hypermesh. Go to > Import>Import geometry>select path>Import.

• Delete the solid part. Go to >F2>select solid>right click>displayed>ok.
• Clean up the geometry for min and max element size. using the defeature option.
• Clean up the edges and unwanted feature lines using the quick edit panel.
• using the quick mesh option in the 2D panel to create 2d tria mesh on the component surface
• Check element QC before creating tetra mesh and clean up any errors.
• Go to >3d>tetramesh panel>click on tetra mesh > in the fixed trias/quad option click on elements>mesh.
• use the F10>3D>tet collapse option to check for any tet collapse failure.
• Rectify the error using the F4 option or by simply re-meshing the failing elements.

Model - 2

Quality parameter -

• Target element size - 3
• Tet collapse - 0.15

Method - Quick tetra mesh method

Procedure -

• Import the geometry as mentioned above.
• Delete the solid part using the F2/Delete option.
• Open the quick tetra mesh option using the utility browser option.
• Goto>view>browsers>hypermesh>utility.
• under utility>mesh>quick tetramesh.

• Select The component> to enter mesh size> Select surface > under mesh type> trias>mesh.

The Hypermesh will automatically perform the Cleanup and create the tetra mesh. Check the tetra mesh for tet collapse and rectify the errors.

Note - In the quick tetra mesh option, the elements created will be stored in a different collector and needs to be moved into the original collector manually.

Model 3

Quality parameters -

• Element size - 4
• tet collapse value - 0.15

Method - Quick tetra mesh option

Result -

Conclusion -

• Various methods for creating tetra mesh were learned through the project
• techniques for Element optimization for proper quality parameters were also learned.
• Understood the difference between the different methods for 3d mesh creation.