Week 6-Meshing of Hood Challenge
Objective: To mesh the Hood component by following the below-mentioned quality criteria.
Target Element Length = 5 Units
| S.No | Quality Criteria | Value |
| 1 | Aspect Ratio | 5 |
| 2 | Skewness | 45 |
| 3 | Warping | 15 |
| 4 | Taper | 0.5 |
| 5 | Min. Length | 2 Units |
| 6 | Max. Length | 8 Units |
| 7 | Min angle Quad | 45 |
| 8 | Max angle Quad | 135 |
| 9 | Min angle Tria | 20 |
| 10 | Max angle Tria | 120 |
| 11 | Tria % | 10 |
CAD model:
A Car's hood consists of 4 main parts. Hood Outer panel, Hood Inner panel, Hinge Reinforcements, and Latch&Hinge Reinforcements. The Hood Outer panel is joined to the inner panel by a process called Hemming. The reinforcements are placed between the outer and inner panels.
Procedure:
- Import the STEP file using the "Import Geometry" option from the Import menu.
- Delete the solids leaving behind the 2D shell surfaces.
- Extract mid surfaces by Geometry>midsurface (skin offset).
- Keep these mid surfaces separately for each component.
- Cleanup the geometry on these extracted mid surfaces.
- Tools in Geometry>Quickedit are helpful for geometry cleanup.
- Mesh the components by using the Automesh option in the 2D panel.
- Edit mesh density to obtain a better mesh pattern and to avoid rotating quads and also to minimize the number of tria elements.
- Set target element size to 5 and check the quality of the mesh from the quality criteria tab.
- Cleanup tools in the quality criteria tab are sufficient enough in clearing the failed elements.
- For Symmetrical components, mesh half portion and reflect the mesh by Tools>Reflect.
- Tools>edges>equivalence helps remove free edges between the reflected mesh elements.
- Make sure that the meshed component has no free edges by using Tools>edges>free edges.
- At hemmed region, toogle the lines above and below the midline of the hemmed surface.
- Create a property card and material card to assign thickness for the components.
Final meshed model:
CAD Step file:https://drive.google.com/file/d/1px8jdztZsIrL4OhASsnhO9q4gha4lGES/view?usp=sharing
Finished model file:https://drive.google.com/file/d/19S_1j6sN2uynuHc_svo4verH6GjVicvI/view?usp=sharing