Week 8-3D Tetra Meshing Challenge

Model 1

Objective –

Create a Tetramesh for Housing component with the following quality criteria.

TetraMesh Generation Method: 2D to 3D Conversion

Elements sizes: Min- 2 Units, Target- 5 Units, Max- 7 Units

Tet collapse: 0.15

Procedure –

1. First I have imported igs file to hypermesh workbench.
2. Then I checked for any solids are available or not. If available I have to delete those.
3. After deleting solids I went for geometrical clean up.
4. Then I mentioned min and max size in criteria file setting as per question.
5. Then I went for 2D automesh in 2D tab.
6. Once I got 2D shell elements I went for check elements that every elements should meet min and max size of elements.
7. If there are any elements failing for mentioned criteria by translating nodes I got these elements.
8. For remesh of failed element, first I clicked on mask option.
9. In mask tab first I had highlighted failed element and went to reverse, where we can see only failed elements.
10. Through distance option we can measure distance between two nodes, as per our criteria we can define the distance between two nodes as well.
11. Following this step I had cleared all the failed elements.
12. Then I moved to 3D tab for tetra elements.
13. For tetramesh , I have added first parameters in tetramesh parameters like max tetra size and tet collapse value.
14. Then I clicked on tetramesh – swap from comp to elements – Select all the 2D shell elements – Hit on mesh. You will get all tetra elements right there.
15. Then I moved to check elements for tet collapse value, where we have to check each elements should meet min tet collapse value as 0.150.
16. If there are any elements are failing for tet collapse value, we can remesh it or else through translate option we can get it.

Final Result –

Model 2

Objective –

Create a 3D Tetramesh with the following quality criteria.

TetraMesh Generation Method: Quick Tetra Mesh/ Volume Tetra Mesh

Target Element size: 3 Units.

Tet Collapse: 0.15

Procedure –

1. First I have imported .hm file to hypermesh workbench.
2. Then I changed Geometry color mode to By Topo to clean the geometry.
3. After cleaning the geometry I went to 3D tab for Volume tetramesh.
4. For Volume tetramesh first I defined tertramesh parameters like max tetra size and tet collapse value.
5. Then I went for volume tetra mesh option. Since my component is in surface I swaped enclosed volume from solid to surface and choosed my component – defined element size as 3 – Then I heat on mesh.
6. After getting mesh elements I checked for tet collapse. Where I found some elements are failing for tet collapse.
7. To remove these failed elements I went for tetra remesh.
8. In tetra remesh I took all the elements and in free boundry faces I swaped from fixed to remeshable. Then I hit on mesh.
9. After then I checked for tet collapse value, where I found no elements are failing for tet collapse.

Final Result –

Model 3

Objective –

Create a 3D Tetramesh with the following quality criteria.

TetraMesh Generation Method: Quick Tetra Mesh/ Volume Tetra Mesh

Target Element size: 4 Units.

Tet Collapse: 0.15

Procedure –

1. First I have imported .hm file to hypermesh workbench.
2. Then I changed Geometry color mode to By Topo to clean the geometry.
3. In Topo mode I found there are solids available, so I went for delete solid through delete option.
4. After deleting these solids I went to 3D tab for Volume tetramesh.
5. For Volume tetramesh first I defined tertramesh parameters like max tetra size and tet collapse value.
6. Then I went for volume tetra mesh option. Since my component is in surface I swaped enclosed volume from solid to surface and choosed my component – defined element size as 4 – Then I heat on mesh.
7. After getting mesh elements I checked for tet collapse. Where I found some elements are failing for tet collapse.
8. To remove these failed elements I went for tetra remesh.
9. In tetra remesh I took all the elements and in free boundry faces I swaped from fixed to remeshable. Then I hit on mesh.
10. After then I checked for tet collapse value, where I found no elements are failing for tet collapse.
11. While importing file I found 4 Components as Hub, central Hub, Casing 1 & Casing 2.
12. Since we are using student version It does not allow me to save all the file in a single file.
13. So I have different file for different components.

Final Result –

Casing 1

Casing 2

Hub

Centrl Hub