Unstructured Tetra Meshing (3D Meshing) a Rear Mirror using ANSA

Unstructured Tetra Meshing a Rear Mirror

AIM

For the given component, check for the geometrical errors and mesh with the given element Quality criteria. Use tetra elements to model the component and there should not and kinks and dips on the surface of the component.

Procedure

Given

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

• For this model, Unstructured Tetra Meshing is to be performed.
• In ANSA, requires the creation of volume for creating solid elements inside them.
• The Volumes may be bounded by Macro Areas and/or FE model shell elements.
• First, before creating the solid mesh, geometry clean-up is done to the given model.
• Set the Quality and Mesh Parameters as per the given.

• Perform shell meshing the faces of the mirror, for curved faces use ortho trias, because it captures the geometry better than normal trias and other surfaces use normal trias.
• Define the volumes, select the closed volume.
• In the list select the volume and we can perform Tetra Rapid or Tetra FEM according to the requirements.

• Tetra FEM - The Tetra FEM algorithm is most suited for geometries of thin to moderately thick volumes and nearly uniform surface element length. Such cases are mostly met in Structural Applications.
• Tetra Rapid - It is most suited for geometries of thick volumes or large domains with significant variation in the length of the surface mesh (say more than 2 orders of magnitude). Such geometries are mainly found in CFD applications.
• Tet Collapse of 0.2 quality is met during the mesh creation.
• Smooth and Fix Quality is used to maintain the given Quality Criteria.

Learning Outcomes

Unstructured Tetra meshing avoiding kinks and dips. Fixing Trias and Tetras Quality.

Conclusion

Tetra Meshing is performed as per the given parameters.

Drive Link - https://drive.google.com/file/d/1z83TZFC-RC4o_0ks1A68YX-TY0f9hbo3/view?usp=sharing