Volumetric Mesh on Rear View Mirror

Aim: To Perform geomerty cleanup, mesh the surface of given rear view component as per the quality criteria given below and convert it to volumetric mesh.

S.No	Quality Criteria	Value
1	Target/Average length	1
2	Minimum Length	0.5
3	Maximum Length	2
4	Tetcolapse	0.2

Model:

Procedure:

1. Import the .IGS file and check the geometry for any geometrical issue as shown.

2. Visually we can see that the component has lot of single con's which should be fixed using Topo Module - Faces - Topo which changes the single con's to double con's as shown.

3. Check the component for geometrical issues using Checks - Geometry as shown.

Fix the Geometrical issues using autofix and ensure there are no errors.

4. Measure the features to check if they will pass the quality criteria as shown.

5. Defeature few features by suppressing the feature line and create midline between two feature lines as shown.

Creating Midline between two fillets.

Project the cons to the surface to create lines and suppress the outer lines to maintain quality as shown.

6. Enter the mesh and quality parameters as provided in the quality criteria and set the perimeter length for the component.

7. Mesh the component with Ortho Tria's on curved surfaces and fillets and normal trias in flat surfaces.

8. Define the volume for the component to generate volumetric mesh.

9. Go to Unstructured Mesh - Tetra Rapid or Tetra FEM and select the volume to generate volumetric mesh as shown.

Volumetric Mesh using Tetra Rapid

Volumetric Mesh using Tetra FEM

10. Check for quality to ensure there is no elements failing for tet collapse.

Conclusion:

The rear view mirror is meshed as per quality and is converted into volumetric mesh by defining the volume for the component.

Learning Outcome:

. Getting to know which tria to use for a flat surface (Tria) and curved/ fillet surface (Ortho Tria).