Week- 5 - Solid meshing

Aim:

For the given Rearview mirror component, check for the geometrical errors and mesh the Surfaces with the given 2D element Quality criteria’s given below.

S.No	Quality Criteria	Value
1	Target/Average length	1
2	Minimum Length	0.5
3	Maximum Length	2

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

S.No	Quality Criteria	Value
1	Tet collapse	0.2

Procedure:

1. Import Model

Open the given (Rearview mirror.IGS) model in ANSA.

2. Geometry Clean-up

Using Topo for the entire geometry, single cons are eliminated.

The components are checked for geometry clean-up using Checks > Geometry and clean up the errors using auto fix and use topo tools like new face, delete and topo etc. to achieve 100%.

3. Shell meshing (2D)

The Mesh parameters and Quality criteria as per requirement is set as follows,

Target/Average length	1
Minimum Length	0.5
Maximum Length	2

Tria type is selected.

Perimeter and macros are set for 1mm using the length in the perimeter option of the mesh tab.

Using Mesh Generation -> Spot, each macro has meshed. (Curved Surface – Ortho tria & others – tria).

Mesh Quality is improved using Shell mesh -> Reconstruct.

4. Solid Meshing (3D)

The Quality criteria as per requirement are set as follows,

Tet collapse

0.2

Define closed volumes separately for each component using Define -> Manual -> Manual by selecting each component.

3 volumes are defined, because of 3 different components to avoid penetration: intersection error while 3d meshing.

In List, select each component re-mesh it using Tetra FEM.

Failed 3d elements are fixed by fix quality (Improve tab of Volume Mesh) or using MV free (Grids tab of Mesh).

Learning Outcome:

To do 3D mesh for the component by various methods mainly unstructured mesh ( Tetra FEM & Tetra Rapid ), Structured and fix quality errors.

Conclusion:

Thus, the given rearview mirror geometry is successfully meshed by 3d elements as per the given quality criteria.