Create a meshing for hood Model Using Hypermesh
Aim:
To create a meshing of Hood check for the geometrical errors and mesh with the given element Quality criteria. After meshing the component the thickness has to be assigned.
Objective:
Follow the below-mentioned quality criteria, mesh the component given below and assign thickness:
Target Element Length = 5mm
| S.N | Quality Criteria | Value |
| 1 | Aspect Ratio | 5 |
| 2 | Skewness | 45 |
| 3 | Warping | 15 |
| 4 | Taper | 0.5 |
| 5 | Min. Length | 2mm |
| 6 | Max. Length | 8mm |
| 7 | Min angle Quad | 45 |
| 8 | Max angle Quad | 135 |
| 9 | Min angle Tria | 20 |
| 10 | Max angle Tria | 120 |
| 10 | Tria % | 10 |
Introduction:
There are a few ways to handle the mesh flow:
The Tria elements should never be opposite to each other
No Tria elements should be connected back to back
No Tria elements should be on the edge of the geometry
No Tria elements should be near the holes
No Tria elements should be on the feature and the fillets.
There should be less Tria concentration, i.e., there should be a considerable distance between Tria elements.
Procedure:
1. Open the model in Hypermesh before assigning the quality criteria, check for geometry issues and fix them.
The above image shows green lines when I keep in Topo mode is because I have deleted the solid form the given model. Now the geometry errors can be fixed by keeping it in wireframe mode.
2. After geometry check extract mid surface for each part in the hood in the current model we have five parts Latch, Sheetmetal Hood, Hood frame, LHS Hinge, and RHS Hinge
3. Here I have used auto mid surface.
5. Now assign the quality criteria and in quality check and keep the model view in element quality so that the elements which are failing while meshing will be visible instantly.
The above image is where the mesh flow and quality analysis is done in element quality view.
6.After meshing the model check for free edges and try to make it equal to the mesh with automatic or try to fix it manually by place node option.
Result:
Few images below show the completed mesh model of hood parts as per the quality criteria.
Hood Top part:
Hinge LHS & RHS:
Hood Frame:
Latch:
Quality check:
Conclusion:
The given Hood Model has undergone geometry clean up, mid surfacing and mesh flow with the given quality criteria.
Reference:
https://skill-lync.freshdesk.com/support/solutions/articles/43000578206-handling-the-tria-elements