Week 3 - 2D meshing for sheet metal
2D meshing for sheet metal
Objective
To take the mid surface for all the components of the given Hood model and mesh the mid surface with the given element Quality criteria
|
S.No |
Quality Criteria |
Value |
|
1 |
Target/Average length |
5 |
|
2 |
Minimum Length |
2 |
|
3 |
Maximum Length |
7 |
|
4 |
Aspect |
3 |
|
5 |
Warpage |
15 |
|
6 |
Skewness |
45 |
|
7 |
Jacobian |
0.7 |
|
8 |
Minimum Quad Angle |
45 |
|
9 |
Maximum Quad Angle |
135 |
|
10 |
Minimum Tria Angle |
30 |
|
11 |
Maximum Tria Angle |
120 |
|
10 |
Tria Percentage |
15 |
Imported model
Figure. 1 shows the imported hood model in ANSA with all four components namely, Inner Extract, Outer Extract, Hinge and Latch.
Figure. 1 Imported hood model
Geometry Clean-up
Figure. 2 shows the Geometry Clean-up of the model using Checks > Geometry, the components are tested for geometry clean-up. Errors are corrected using auto fix, and topo tools such new face, delete, and topo are used to correct any remaining issues.
Figure. 2 Geometry Clean-up
Mid – Surface Extraction
Via choosing the faces of each component by the offset option and entering the distance as half of the thickness, manual mid surfaces are extracted as shown in Figure. 3 - 7. All the Mid – Surfaces are again checked for errors.
Figure. 3 Outer Extract
Figure. 4 Inner Extract
Figure. 5 Hinge. 1 Extract
Figure. 6 Hinge. 2 Extract
Figure. 7 Latch Extract
Property and Thickness
New PIDs and their thicknesses are allocated to the mid surfaces of the hood's component parts as shown in Figure. 8.
Figure. 8 Property (PID)
Mesh
The Quality Criteria and Mesh Parameters are entered in accordance with the instructions shown in Figure. 9 & 10.
Figure. 9 Quality Criteria
Figure. 10 Mesh Parameters
Cons and Hot points are modified to match the criteria, and then Perimeter and macros are set for 5 mm using the mesh tab's perimeter option's length setting. The best mesh generation option is used to mesh each component's face, while the reconstruct mesh option in shell mesh is used to boost mesh quality. Failed elements are removed using Split, Swap, Join, Smooth and Num +/- options. Final meshed model parts are shown in Figure. 11 - 15.
Figure. 11 Meshed Outer Extract
Figure. 12 Meshed Inner Extract
Figure. 13 Meshed Hinge 1
Figure. 14 Meshed Hinge 2
Figure. 15 Meshed Latch
Conclusion
The provided Car Hood component has been successfully meshed to meet the requirements.