Week - 4 - 2D meshing for Plastic components
AIM:-To extract the midsurface & mesh the bottle cap component with given quality criteria.
|
S.No |
Quality Criteria |
Value |
|
1 |
Target/Average length |
1 |
|
2 |
Minimum Length |
0.5 |
|
3 |
Maximum Length |
3 |
|
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 |
PROCEDURE:-
1. Geometry Cleanup- After importing thr CAD model, we need to check the geometry & clean the errors like triple cons, needle faces crack surfaces, single cons etc.
2. Midsurface Generation:- Midsurface here taken by manual operation instead of Automid.
With the use of offset option midsurface is generated in the area having same thickness value.
In this model we have trapezoidal surface where offset method will not work.
So, for these areas we have to generate the curve at the middle by selecting both side cons.
Then those curve will be projected to surface & midsurface will be generated by using faces- new option.
We gave some ribs features, for which faces-middle option is used for midsurface generation.
3. Assign PID- After generating the midsurface for all the region, a new PID is to be assign for the midsurface.
4 Mesh Generation:-Before generating mesh, mesh parameter & quality parameter need to be set.
Now select Best mesh from mesh generation menu & select the area.
One should use smooth option after mesh generation & even after reconstruct option for better mesh flow.
Use split, swap, paste command to reduce the trias and good mesh flow.
Some areas are failed for quality criteria. These are under off elements
Final model after meshing.
Now select draw shell as solid from Quality:-Presentation parameters.
Final solid component.
LEARNING OUTCOMES:-
1. Generation of misdurface for plastic model having varying thickness .
2. Commands like curve generation & project cons faces middle options etc.
3. Taking mid for trapezoidal & ribs area.
CONCLUSION-
Plastic Model is meshed with given quality criteria by assigning thickness value to various region.