Week 8-3D Tetra Meshing Challenge

AIM: 

To create a Teramesh for Housing component with the following quality criteria

PROCEDURE: 

Model 1 -
   

 Step 1:-

• Very first step is to import the given model and to check on any geometry error
• In the model shown below there are some missing surfaces

• Filling the missing surfaces by Surface option or quick edit> filler surface option,

 

 Step 2:-

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

• Initially Mesh the surface

 

• Check for minimum and maximum element size error and clear the same
• 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:-

• There is no minimum and maximum element size criteria in the model
• So use the volume tetramesh method in order to mesh the model
• The given model is surface, so used 3d>tetramesh>volume tetramesh> surface, give the desired element size and give tet collapse value in tetramesh parameter
• The given model is meshed and all the tet collapse errors are fixed

Model 3:

Steps carried out :-

• Import the model to the software,
• Look for geometry error if any,
• 4 different components in this model are present, mesh each of 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 then convert the same to 3d tetramesh
• Hub will be meshed on the one side and will be reflected on to the other side as shown in the following figure

• Check for only tet collapse error if any in the model and if occurs any fix the same
• Final output is displayed in following figure

CONCLUSION:

• The types of 3d mesh used in different scenario are acknowledged 
• As per the given quality criteria all the given models are meshed using 3d tetra elements