Week 4 - 2D Meshing for Sheet Metal

AIM

For the given CCB CAD model, Check for the Geometry cleanup (if required), Take the mid surface, and Mesh it with the below 2D element Quality criteria.

S.No	Quality Criteria	Value
1	Target/Average length	5
2	Minimum Length	3
3	Maximum Length	7
4	Aspect	3
5	Warpage	15
6	Skewness	45
7	Jacobian	0.7
8	Minimum Quad Angle	45
9	Maximum Quad Angle	135
10	Minimum Tria Angle	30
11	Maximum Tria Angle	120
10	Tria Percentage	15

OBJECTIVE

midsurface ,meshing with quality criteria,assign thickness

BODY OF CONTENT

• Importing the component
• refine perimeter and macro to targetted length

Geometry Checks:

• The geometry checks are used to check the geometry setup file using checkbox by selecting the geometry option
• And it shows that various errors in the geometry on the surface.
• After that we need to surfacing cleaning is done .

• create mid surface of the given component using auto mid skin offset method
• 

Midsurface:

1. Midsurface is the process of Extracting the skin of the component according to the thickness of the Component.

Meshing:

1. Before Meshing we need to clean up the Some Geometry error also then only the flow of mesh should be smooth.
2. While Meshing we need to maintain the quality criteria then only we will get the required output.
3. In the presentation parameters, we need to enable Elements (%)

4. input given quality criteria

   classic mesh-->mesh generation-->best(for meshing parts)

   shell mesh-->reconstruct,smooth (for organising the mesh)

   make sure there is no off elements other than the ones failing for minimum length due to cad geometry

5. 

After cleaned Meshing :

Assign PID based onthe thickness and assign thickness to components and save the model

Conclusion

Mid surface of all components has been made and meshing has been done and saved as different pids based on thickness

Trias has been kept to minimum to avoid failure due to stress concentration

Quality criterias are all satisfied as per given and off elements are avoided to a zero