Week 8-3D Tetra Meshing Challenge

1. Create a Teramesh 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

2. For the given model, 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

3. For the given assembly model, 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:

MODEL 1:

1. Download the model from the assignment and check the model format.
2. It is in the format of .step
3. Import the model in the Hypermesh by selecting the .step format.
4. 
5. Delete the solid part in the model.
6. Go for geometry clean-up, check any red lines are present in geometry by opening the wireframe.
7. Mesh the given geometry with 2d tria element on surface. For that go to 2D > AUTO MESH > CHANGE THE ELEMENT LENGTH OF 5 > MESH TYPE=TRIA > SELECT THE SURFACE > MESH.
8. 
9. Now open the quality parameter check any element is failing or not. I have found some failing element in meshing.
10. 
11. I have used rebuild mesh and quality clean-up tools to fix quality parameter errors.
12. 
13. To create 3d tetra meshing go to 3D > TETRA MESH > COMP = ELEM > SELECT THE ELEMENTS > MESH.
14. 
15. Now check 3d element failing element tetra collapse by pressing
16. fix the tetra collapse quality parameter by changing the length of node. For that go to F4 > TWO NODES > SELECT THE TWO NODES > GIVE THE DISTANCE.
17. 
18. Fix all error manually, if possible, to understand the elements quality.

Model 2:

1. Download the model from the assignment and check the model format.
2. It is in the format of .IGES
3. Import the model in the Hypermesh by selecting the .IGES format.
4. 
5. Go for geometry clean-up, check any red lines are present in geometry by opening the wireframe.
6. Now go to 3D > TETRA MESH> TETRA MESH PARAMETER = 0.15 > VOLUME MESH > ELEMENT SIZE = 3 > SELECT THE GEOMETRY > MESH.
7. 
8. Now check 3d element failing element tetra collapse by pressing
9. 
10. fix the tetra collapse quality parameter by changing the length of node. For that go to F4 > TWO NODES > SELECT THE TWO NODES > GIVE THE DISTANCE.
11. save the file.
12. 

Model 3:

1. Download the model from the assignment and check the model format.
2. Open that model in the hyper mesh.
3. Check the number of components. It has 4 components.
4. 
5. I have decided to do two components tetra meshing and two components hexa meshing.

(sir suggested me to do that to make practise of hexa meshing).

FOR TETRA MESHING:

5. Go for geometry clean-up, check any red lines are present in geometry by opening the wireframe.
6. Now go to 3D > TETRA MESH> TETRA MESH PARAMETER = 0.15 > VOLUME MESH > ELEMENT SIZE = 3 > SELECT THE GEOMETRY > MESH.
7. 
8. Now check 3d element failing element tetra collapse by pressing
9. fix the tetra collapse quality parameter by changing the length of node. For that go to F4 > TWO NODES > SELECT THE TWO NODES > GIVE THE DISTANCE.

FOR HEXA MESHING:

1. Go for geometry clean-up, check any red lines are present in geometry by opening the wireframe.
2. Now go to 2D > AUTO MESH > CHANGE THE ELEMENT LENGTH OF 4 > MESH TYPE= QURDS > SELECT THE SURFACE > MESH.
3. 
4. Now we use line drag option to use for creating hexa meshing. For 3D > LINE DRAG > DRAG ELEMENT > SELECT THE ELEMENTS > SELECT THE LINE > ON DRAG = 4 > DRAG.
5. 
6. Repeat it for total geometry.
7. 

LEARNING OUTCOMES:

1. Making of tetra meshing.
2. Different methods to make tetra meshing.
3. solving the 3d quality parameter errors like tetra collapse.
4. basic knowledge making of hexa meshing.