Week- 5 - Solid meshing

Aim

For the given Rear view mirror component:

a. Check for geometrical errors

b. Mesh the surface with the 2D elements as per the given criteria

c. Mesh the volume using tetra modelling as per the given quality

Procedure

First of all, the given solid component was inserted in ANSA and topo was given. After giving the topo we have achieved a fine topological arrangement between the different features of the given component. The steps are given as:

1. Geometry Clean up

first of all, geometry was checked by click on the geometry option in check. Below figure is showing that the geometry was not perfect:

After fixing the triple cons and uncheked faces directly using fix option, geometry was cleaned up as given below:

2. Creating the 2D Surface Mesh

The entire surface of the given solid component was 2D spot meshed as per the below quality criteria:

S No. Quality Criteria Value

1. Target Length 1

2. Min Length 0.5

3. Max Length 2

After reconstructing and smoothing the mesh, the 2D meshed solid component is as given below:

3. Creating the solid/Volume Mesh

After 2D meshng, in the volume mesh module new list was prepared using auto detection of volume. By selecting the list option, Tetra FEM algorithm was used to volume mesh the four different volumes mentioned in the list. The visualisation of the volume mesh generated was as per given figure below:

After successfully completing the solid meshing, Volume mesh was realesed from CAD itself using release option in the volume mesh module. The new PID was set for the final meshed solid.

Learning Outcomes

a. Learned to deal with solid component

b. Geometry cleaning using the manual and autofix option

c. Spotmeshing to generate 2D mesh on the solid surface

d. Generating the volume mesh using Tetra Fem algorithm

e. To deal with volume mesh quality errors (tet collapse)

f. To release the solid elements from CAD

Conclusion

a. The given solid model was checked for geometry.

b. 2D surface nesh was generated.

c. Volume mesh was given to the component using Tetra Fem algorithm.

d. No solid mesh element was found to fail the mesh quality criteria.