Week 8-3D Tetra Meshing Challenge

3D TETRA MESHING

AIM:

To perform 3D tetra mesh on the given models.

OBJECTIVE:

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: HOUSING

• Import the given model and check for any geometry error.
• Next step is to defeature some edges which might fail for minimum length quality criteria.
• Initially mesh the surface using 2D tria elements.
• Check for minimum and maximum element size error from and clear the same
• Perform 3D tetra mesh using the 2D tria elements, 3D -tera mesh -select the elements.
• Check tet collapse for 0.15, in tools- check elements – 3D – tet collapse, fix the errors by tetra remesh or manually by moving the nodes.

MODEL 2:

• Import the geometry to the software.
• Look for any geometry error in the cad, this model contains few unstitched edges.
• In this model there is no minimum and maximum element size criteria.
• So used the volume tetra mesh method to mesh the model.
• The given model is surface, so used 3D – tetra mesh – volume tetra mesh – surface, gave the desired element size and gave tet collapse value in tetra mesh parameter.
• The given model is meshed and fixed all the tet collapse error.

MODEL 3:

• Import the model to the software.
• There are 4 different components in this model, mesh each the component in different methods.
• Casing 1 is meshed using volume tetra mesh method.
• Casing 2 is meshed using quick tetra mesh method.
• Central hub is meshed by 2D tria element and convert the same to 3D tetra mesh.
• Hub will be meshed one side and be reflected to the other side.
• Check for only tet collapse error and fix the same.

CONCLUSION:

• Understood the types of 3D mesh used in different scenario.
• The given model is meshed using 3D tetra element.