Week 6- Challenge

Introduction:

Quality Criteria are the specific elements or functions that will be selected, tested and measured in order to confirm that the quality objectives have been met.

Objective:

To extract the mid surface and generate the mesh for hood according to the given quality criteria using Hypermesh.

Procedure:

In order to attain the above objective we need to do the following steps;

1. Import the model into Hypermesh using the import geomentry menubar.
2. Delete the solids using the delete tab.
3. In order to extract the mid surface we must make sure the model is free from errors.
4. 
5. Then extract the mid surface using auto midsurface option in geomentry panel.
6. Mid surface is extracted individually for each component.
7. 
8. The components are Inner panel,Outer panel,Latch and Hinge.
9. Now, Topology cleanup is done.
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11. For that we must ensure the surface and edges are free from errors or any deformation in the surface.
12. According to the mesh of the particular surface needed the edges are surpressed.
13. Inorder to mesh the component we ensure that the extracted mid surface is clean topological errors.
14. Mesh the components individually using automesh in 2d mesh panel.
15. 
16. Assign the element size as 5mm and the element shape as quads.
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18. First half of the surface is meshed, then reflect option is used to mirror it to other half.
19. 
20. The mesh is refined until its smooth and the tria elements should be removed as much as possible with drag tria tab in Quality index option.
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22. The nodes are increased and decreased during the mesh according to proper capturing of the surface.
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24. After meshing, now check fpr the quality criteria and reorganise the elements where it fails to give the quality.
25. Tool-Check elems-where we can find various quality criteria like warpage,aspect ratio,skewness,length,angle and taper.
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27. Values given to the criteria accordingly and checked.
28. Then using reflect option mirror of the elements is done.
29. After reflecting the mesh we fill the gap between mesh using the edges option in the tools panel.
30. 
31. Therefore, its done.

Tools Used:

1. Midsurfacce
2. Quick edit
3. Edge edit
4. Autocleanup
5. Automesh
6. Quality index
7. Elem Cleanup
8. Edit element
9. Translate
10. Project
11. Reflect
12. Check elems

Conclusion:

Hence, extraction of midsurface and generation of mesh of hood according to the given quality criteria is done.