Week 8-3D Tetra Meshing Challenge

AIM: To perform 3D tetra mesh on the given models

PROCEDURE: 

 Model 1(Housing)
   

 Step 1:-

• Import the given model and check for any geometry error
• In this model there are few missing surface like shown in the below image
  
• Fill the surface by Surface option or quick edit> filler surface option, like shown in below image
   

 Step 2:-

•  Next step is to defeature some edges which might fail for minimum length quality criteria, like 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
   
  
  

Step 3:-

• Perform 3D tetramesh using the 2D tria elements, 3D>Tetramesh>select all 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
• Below image shows there is no tet collapse error
  
  

Model 2:

 Step 1:-

• Import the geometry to the software
  
• Look for any geometry error in the cad, this model contains few unstitched edges like shown below
  
• The above errors will be fixed by toggle edge option, like shown in the image below
   

 Step 2:-

• 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
• Central hub is meshed by 2d tria element and convert the same to 3d tetramesh
• Hub will be meshed one side and be reflected to the other side like shown below
  
  
• Check for only tet collapse error in this model and fix the same
• Final output is shown in below image