Week 8-3D Tetra Meshing Challenge

AIM:

To generate tetramesh for the following models using normal 2-D to 3-D conversion method, Quick tetra Mesh and Volume tetra mesh

Objective:

- To create a tetra mesh for the given component.

- To do the solid mesh cleanup.

- Perform the different solid mesh techniques to remove the errors.

PROCEDURE: 

 Model 1-Housing:

Steps carried out:

- As per the requirement the model has to mesh. Prior to mesh geometry cleanup has to be done in order to remove the regions where the elements might fail for a minimum length.

- Such areas have to be toggled and changes should be done as per the requirement. Some of the changes are shown below. 

- Initially Mesh the surface using 2D tria elements

• Check for minimum and maximum element size error from and clear the same
• Below the image shows there no min and max element size error. 

- Perform 3D tetramesh using the 2D tria elements, 3D>Tetramesh>select all the elements

- Then finally the tetramesh will be generated,but we have to check for any failure that might be present in that component

Model-2:

Steps carried out:

- Import the geometry to the software

- Look for any geometry error in the cad, this model contains few unstitched edges.

- The given model has lots of errors at certain portions.These  errors will be fixed by toggle edge option

• In this model there is no minimum and maximum element size criteria
• So used the volume tetramesh method to mesh the model
• The given model is surface, so used 3d>tetramesh>volume tetramesh> surface, gave the desired element size and gave tet collapse value in tetramesh parameter
• The given model is meshed and fixed all the tet collapse error
• Below image shows the final result

Model 3 :

Steps carried out :-

• Import the model to the software, look for any geometry error.
• There are 4 different components in this model, mesh each the component in different methods.
• Casing 1 is meshed using volume tetramesh method.
• Casing 2 is meshed using quick tetramesh method.

• Check for only tet collapse error in this model and fix the same.
• Here in this model we are doing tetramesh separately for all the components as hypermesh has a possibility of crashing due to graphic intolerance.
• So after tetra mesh is done ,we can check for the failures due to tet collapse.
• The failures can be removed using the tetraremesh options.
• Thus we can have a complete model after remeshing them

Conclusion:

Thus we can use these three methods to generate tetramesh on the desired components. But from my learning rather than tetra volume meshing ,quick tetramesh gives a bette mesh flow.