Week 4 - 2D Meshing for Sheet Metal

Link:https://drive.google.com/file/d/1JBVX_IHC1ZojvfcA-Y-NZhdzQT3H0wbi/view?usp=sharing

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

Procedure: Opening the cad file in ansa first and then we have to understand the geometry of the water bracket model and to anaylaze it.Then performing the topo option to join the different part of hood model.After that perform the check geometry there mighty be serval error in the cad file due to format conversion process error should be clear before starting for mid surfaces.after checks geometry we should measure the length of model at different part before performing midsurface.

Topo:

Modules buttons>faces>topo>select model>middle mouse buttons

Geometry checks:Tools>checks>geometry>execute button>fix error right click>

Measure:measure the length at different section of the model

Utilities> measure>nodes

Mid surface:Modules Button>Faces>offset>select the face of model>middle clk>option list> ask always>enter the value

Modules buttons>faces>Mid surface>skin>select surface

Property Id: ctrl+p>New>pshell>rename it

Quality criteria : press f11 and enter the parmeter value

Target length>Mesh parameter

Meshing:

Tools Used:

• Mesh>Modules button>Shell Mesh>Reconstruct>select surfaces>middle mouse button
• Collapse>For oppsite trais>Mesh>Modules button>Shell Mesh>collapse
• Split & Swap

Thank you