Week 3 - 2D meshing for Sheet metal

AIM: For given hood model, take out mid surfaces for all the components in the model mesh thes midsurfaces with given quality criteria ,and assign the thickness.

GIVEN DATA:

     Here given data provide are

1.Quality criteria -

sl no	Qualkity 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	Min Quad Angle	45
9	Max Quad Angle	135
10	Min Tria Angle	30
11	Max Tria Angle	120
12	Tria %	15

Procedure-

1. Import the given cad model in the ansa.
2. Give the TOPO on the enteir model to join all the faces.
3. Clean all the edges by using FINE command for better mid surface creation.
4. Do the geomatric cleanup before ready for the model for the meshing.
5. Clear all the geomatrice issue by Right click- select the option FIX then all the issue are resolve by the ansa itself.
6. Some issues are not solve by the ansa so we are now fix the issue by Manually.
7. Measure the thickness of the enteir component for the midsurfece creation.
8. Go to the faces-Extract option for creating the mid surface.( Faces- Extract- enter the value- middle mouse click) Enter the value with the total thickness of the g`iven model devided by2.
9. Assign specific PID in the midsurface.
10. Assign  a thickness of the midsuface.
11. Cheak the geomatric and clear all the geomatric issue befor going for the meshing.
12. After doing the all operation set the given quality criteria for the meshing model.
13.  Now select the all holes notdes into an given number.
14. Given the mesh element size.
15. Now devided the large surface into the small small part for the good meshing result.
16. Now doing the mesh in each and every small surface after the meshing cut the lines and join the mesh.
17. Now cheack the quality of the mesh.
18. now the model is ready for the future operation.

     Step-1

       Import the CAD Geomatric 

Go to file> go to open> select file location> ok

     

step-2 

use the topo command for join the all surface

Go to face option> Select TOPO> Select entaire surface > middle mouse 

     

       Before Topo                                                          After Topo 

Step-3

Use the fine command foe set the edges of the cad model

Go to Auxillary> select FINE 

                     

             Before                                                                                                              After 

Step-4

 Done the Geomatric cleanup before going to the meshing. 

Go to cheackes manager> Go to geomatric option> select it > Exicute 

                 

                        Before   

 Step-5

 Clear all the geomatrice issue by Right click- select the option FIX then all the issue are resolve by the ansa itself.

                                                                                                                              

Step-6

Some issue are not solve by the ansa so we can clear the issue by manually.

Step-7

Measure the thickness of the entaire comonet 

Go to the measurement command on the top of the ansa interface > Select the nodes for measurement and store it.

Step-8

Now generate the mid surface for the meshing 

Go to > Faces option> Upset > select the surface one by one> middle mouse> Enter the value > Middle mouse.

     

                  fig-1                                                                                                                           Fig-2

                                                                                                 

                                                                                                                               Fig-3

Step-9

Assign specific PID in the midsurface 

Step-10

Assign the quality parameter and starting the meshing 

Step-11

Try to Follow the all tria element criteria or Meshflow Rule 

Step-12

Cheack all the area step by step and solve all the quality issues of the element.

Step-13

Submit the model in IGES, RADIOS,And .FEM Files