Week 4 - 2D Meshing for Sheet Metal

OBJECTIVE: For the given CCB CAD model, checking for the Geometry cleanup then after taking, the mid surface and meshing with respect to the given 2D Geometry Quality Criteria.

CCB CAD model:

                                                                    Fig.01

PROCEDURE: First the CAD model open in ANSA software, perform Topo and seprate the many porperty to get Geometry cleanup, after Geometry Cleanup to perform the mid surface and do the mesh in a proper given Criteria. the first step to each property define a parameter length to give in this challanges as 5 mm.

FOLLOWING THE BELOW STEP:

1.  DO THE TOPO:

To connect the Geometry each other.

                                                                    Fig.02

After perform topo to connect each other.

                                                                     Fig.03

2.GEOMETRY CLEANUP:

To check the Geometry cleanup.

                                                                      Fig.04

Here show the many errors. after excute.

                                                                     Fig.05

Now auto fix and clean the Geometry.

                                                                         Fig.06

3.MID SURFACING:

Take one by one part and parent Geometry and do mid surfacing of each part seperately and measure the thickness of parent Geometry.

                                                                 Fig.07

Generate mid surface and we selected offset from Faces command option,used Feature angle and selected the upperface of geometry .Then after clicking middle mouse button we get the arrow and pop up to give the  offset distance .As direction of arrow is away from the geometry. use to sign offset (-0.8 as show in below image)

                                                                       Fig.08

After clicking 'OK' we get the option to delete the original faces or not,so click on 'No'

                                                                      Fig.09

Create seperate property PID of each part for midsurface.

                                                                     Fig.10

4. MESHING:

                                                                     Fig.11

Take one by one part from midsurface geometry and do meshing of each part seperately.Switch to Mesh Module ,choose Classic Mesh option .Use length option from Perimeter ,on middle click pop up box opens put 1 there.

Set Mesh parameter as given as per given requirements.

                                                                      Fig.12

Quality Criteria as per given Requirements. select only given parameters and put the values as per requirements.

                                                                       Fig.13

Use length option from perimeter on middle click box open put 5 target length given is 5

Select the part and use BEST option from mesh Generation to generate mesh.

                                                                       Fig.14

After meshing we don't get the proper mesh as per quality criteria, so use Reconstruct option from shell mesh.

                                                                         Fig.15

After use Reconstruct options.

                                                                     Fig.16

Try to reduce trias using Reconstruct,Split,swap, Smooth,Collpase options from Shell Mesh.

                                                                      Fig.17

                                                                  Fig.18

5.FINAL MODEL:

                                                                    Fig.19

 6. RESULTS:

1. There are some errors in the model because of the Geometry, distance between two nodesis 2.5 and as per our Quality Criteria minimum length should be 3 so our model be failing in that part where the distance between two nodes is less.