Week 3 - 2D meshing for sheet metal
AIM - 2D messhing for a sheet metal
steps to perform a 2d meshing for a given element are-
1. geometry file import to ansa software
2. analysis the geometry and isolate as per requierment,- by using boolean commands, store lock, manage store
3. assine the property card and material card values in it
4. check the thickness of geometry in all sides
5. do geometry clean up and slove the error ,face cracs,cones,etc- by check geometry command
6. create mid surface manuval by orient command for color and offset command for mid surface
7. and also by mid surf command we can create automatic mid surface by box selection
8. assine property card to new mid surface geometry
9. performe topo to join the faceses of new mid surfaceses
10. after topo do geometry clean up (removing exta lines, curve mating lines etc)
11. after geometry clean up set perimeter length by box selection
12. cross check the perimeter length in all sides ,if not then add or remove the hot points
13. maintain the circle and other holes node points in even number and slide them parallel
14. set average length -5, minimum length- 2
15. after topo module complition move to mesh module- classic mesh 2d mesh
16. set qulatiy 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 |
16. mesh the un meshed elements - best mesh, reconstruct, smooth, are meshing commands
*avoid the tria elements in opposite or same in direction
*avoid the tria at perimeter lines
*avoid the rotating quads in mesh flow
*avoid back to back trias
to handle trias and quads - split , paste, swap commands are used
17. mesh flow direction should be in a one direction flow from start point
18. maintain quality criteria values without fail
19. if quality pass in a mesh with out fail then our preprocessins model is ready
20. file transfer to post processor