Challenge

Week- 6 - Solid meshing

Report on Solid Meshing

Aim:

Use tetra elements to mesh the Volumes defined in the model and check for the quality after Volume meshing.

Software: ANSA

Given model of Rear view mirror component

Pre-processing

Pre-processing involves steps .They are:

Step - 1:

Step - 2:

The imported CAD geometry has few errors due to transfer of the CAD model into ANSA.
Perform geometry check, so that we can find errors such as unchecked faces,needle faces and cracked faces.
Switch to Classic Topo module.
we can fix these issues using Topo commands such as insert,delete,paste,release topo,cut,new,fine...
Following are the errors in the geometry.

Before Fixing:

After Fixing:

Step - 3: Shell Meshing

Now switch to classic mesh module.
Meshing of the model is generated using Best command in mesh generation group.
As rear view mirror is the complex model mesh should be generated layer-by-layer.
At complex areas , do not directly mesh, as it makes the mesh clumsy. Instead make some cuts on the mid-surface then mesh.

Step - 4: Solid Meshing

Now switch to volume mesh module.
Define the volume for the part volumes using define option in the volume group and view the PID of solids in the List.

Meshing of the model is generated using Tetra FEM command in unstructured mesh group.
As rear view mirror is the complex model mesh should be generated Part-by-Part.

Step - 5: Quality Criteria

S.No	Quality Criteria	Value
1	Tet collapse	0.2

Step - 5: Mesh Improvement

The collapse failure is improved by either reconstructing the surface or by MV Free.

Before Fixing:

After Fixing:

Conclusion:

Tetra elements are used to mesh the Volumes defined in the model and quality is checked after Volume meshing.

NOTE:

https://drive.google.com/file/d/1hEhytzrgtj5n-nFiTY0kZIYKzG9Xk3B3/view?usp=sharing

Ship work like this
in your own course.