Week_8_Plastic Model_1

AIM:

TO MESH THE GIVEN COMPONENT IN THE TASK WITH THE TARGET ELEMENT SIZE.

Elements Quality Criteria:

S.N	Quality Criteria	Value
1	Target Element Length	5 mm
2	Aspect Ratio	3
3	Skewness	45
4	Warping	30
5	Taper	0.5
6	Min. Length	3 mm
7	Max. Length	7 mm
8	Min angle Quad	45
9	Max angle Quad	135
10	Min angle Tria	30
11	Max angle Tria	110
12	Tria %	15

Procedure To Accomplish The Given Task:-

Step 1:-

We have to Download the model and import it into Hypermesh software.

Step 2:-

We have to check the plastic component which is given is solid or surface, As when I checked in TOPO mode it is visible in green color resembling that it is having a solid part with a different thickness as it is a plastic component.

Step 3:-

After deleting the solid part we set surfaces for the component.

Step 4:-

Now we have to check its geometry and if there are no errors we can proceed with making mid-surface.

Step 5:-

We have checked the mid-surface to rectify geometry errors.

.

Here the unwanted lines are there on the surface which can lead for bad mesh flow.

So I toggled the unwanted lines to rectify this error.

Step 6:-

Here too same situation as we saw in the above case.

Toggleing and replacing the points got rectified in this region.

Step 7:-

So to mesh the component we have to set the given quality parameters.

Step 8:-

We gonna need to start correcting the geometry for the proper mesh flow in the surfaces according to the given criteria.

After correcting the middle surface. We do this by creating the initial mesh and then smoothing it using the quality index and then by saving the failed elements and masking them to identify where the element is failing and by adding temp nodes to those elements and unmasking all the elements, as we added temp nodes to find the areas to work on we can delete the elements and we have to work on the surface.

Step 9:-

We have to rectify the geometry for capturing the component as much as we can.

So here we have to capture the mid-surface as much as we can.

Step 10:-Now we have to make the main mesh after correcting the issues.

Step 11:-

As we can see we need to fix the mesh for proper mesh flow.

So I tried to correct the mesh flow.

Step 13:-

We gonna have to check the mesh at all regions to make proper mesh flow.

Step 14:-

Here too the mesh needs to be corrected and on the other side, we need to reduce the Tria's count in the mesh flow.

Step 15:-

I again rectified the mesh rebuilding it and replacing the points dragging trias to reduce the tria count in the mesh flow.

I tried my best to make a proper mesh flow anyways we can't completely reduce trias as we see some converging and diverging regions in the component.

Step 16:-

After that, we have to give the thickness to the surfaces for that we need to organize the different thickness surfaces to different collectors so that it is easy to give different properties to each different surface.

As shown in the above pic we need to create different collectors and different properties of thickness to assign the different surfaces, we can use colors to vary the surface for our visibility to understand.

Step 17:-

At last, we need to check edges and need to check element connectivity and if any issues with it need to be corrected, and also have to check the normality should face the same side of every element face.

So in this way, we need to verify the elements.

Result:-

By completing all the corrections we completed the task according to the given criteria.

Below are the Quality criteria for the Plastic Model:

Element quality criteria :

S.N	Quality Criteria	Value
1	Target Element Length	5 mm
2	Aspect Ratio	3
3	Skewness	45
4	Warping	30
5	Taper	0.5
6	Min. Length	3 mm
7	Max. Length	7 mm
8	Min angle Quad	45
9	Max angle Quad	135
10	Min angle Tria	30
11	Max angle Tria	110
12	Tria %	15

This is the final model of the components of satisfying all the given criteria.