GEOMETRY CLEAN UP AND MESH THE HOOD MODEL, ASSIGN THE THICKNESS AND CHECK FOR QUALITY CRITERIA USING HYPER MESH.

Objective:

• To Perform mesh for the given Hood model and check for the quality.

Procedure:

• First we have to import the Hood model to Hyper mesh work page as shown in the below figure.

• For above model we have to extract the mid surface because it is better to extract the middle surface for Sheet metal components and plastic components and it is also recommended where thickness is less than 5mm.
• Hood model having a symmetry so we can work on one side after that we can reflect to other side.
• Why we are extract the middle surface because of the following reasons
  • It takes less time to post-processing the results.
  • Accuracy of the mesh is good.
• The following are steps to taken for extracting the middle surface.
  • Go to Geometry
  • Click on Midsurface
  • Selecting the entire model by shift+Right mouse button
  • Hit on extract
  • While extracting the surface it takes time.
• After Extract the middle surface the below figure shows.

Inner model:-

• After that we move on to Surface the mesh.
• Click on automesh or by using F12 for automesh.
• By selecting the entire model with an element size 5mm with quade mesh style and than click on mesh we get mesh as shown blow figure.

• We go with the quality criteria as for the following parameter.

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

• Go to Tools under tool click on check elements or press F10 check elements dialogue box will appear as shown below.

• When we apply the quality criteria the below figure shows that which are elements voileting under quality.

• Now we have to eliminate the above errors by using the following tools.
  • Place node
  • Smooth
  • Swap edge
  • Drag tria element
  • Node optimization
  • Element optimization
• Finally we clean up the geometry and as shown below figure.

• After that we can reflect the mesh to other side by using tool called reflect under tool and figure as shown below.

Outer Surface:-

• The same procedure was followed for the outer surface and the final model as shown below.
• Final model as shown below.

Conclusion:-

• The mesh was created for both inner and outer panel.
• The quality criteria was satisfied for the given quality parameters.