Tool Test 1
AIM:-
- To check for the geometrical errors
- To mesh with the given element Quality criteria.
- Meshing the component and thickness has to be assigned.
PROCEDURE:-
1) IMPORTING THE CAD MODEL:-
- Open the ANSA software and import the cad geometry by clicking on File>Open>Browse the file from the list. Click OK.
- As you can see the geometry is not in a good shape and it is hard to understand the geometry.
- We can give the Length Parameter as 1 for the better visualization and to refine the model for our workability by going to Mesh Module, under Parameter tab click on Length. Give Length as 1.
- Perform the topo function to arrange the faces and geometry of the model by selecting the Topo Module>Faces>topo. then make a box selection over our geometry
2)GEOMETRY CLEANUP:-
- After doing the topo, we can do the Geometry Check, by clicking on the Checks tool on Tools toolbar.
- From the window appearing, check in the check list as our requirement, it include options like Unchecked faces, Collapsed Cons, Triple Cons, Needle Faces etc. Click on EXECUTE.
3)MID-SURFACE GENERATION:-
- For the mid surface generation we can use Mid.surface tool or the Offset tool in the faces tab in Topo module. Click on the midsurface or offset tool, select the faces to mid surface, give the required distance, middle click the mouse button. To select the whole faces in a single click use the option Features in the feature selection toolbar.
4) Meshing:-
- Before starting the meashing we should set the quality criteria. For that select Utilities tab and select Quality Criteria or F11. Set the criteria as our requirements.
|
S.No |
Quality Criteria |
Value |
|
1 |
Target/Average length |
4 |
|
2 |
Minimum Length |
2 |
|
3 |
Maximum Length |
6 |
|
4 |
Aspect |
3 |
|
5 |
Warpage |
13 |
|
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 |
- For meshing a part we can use the Best option in the Mesh Generation tab. Click on Best, chose the face to mesh, middle click
- After meshing for getting a good quality mesh we can use the Reconsturction or smooth in the shell Mesh tab
- The quality of the mesh depends on number of rotating quads, trias and errors present. Reduce maximum number of trias , eliminate all rotating quads and errors
- most of the opposite trias can be eliminated using Split and Swap in Element tab, also by using Paste option in Grid tab
CONCLUSION:-
- All the geometrical errors are rectified.The part was meshed and thickness is applied.