Project 1

Objective:For the given IP substrate component, clear the geometrical errors and extract the mid surface. Then mesh the component with the given element Quality criteria and also thickness has to be assigned.

Quality criteria:

Target/Average length	4
Minimum Length	2
Maximum Length	6
Aspect	3
Warpage	15
Skewness	45
Jacobian	0.7
Minimum Quad Angle	45
Maximum Quad Angle	135
Minimum Tria Angle	30
Maximum Tria Angle	120
Tria Percentage	15

Procedure:

• Open the file in ANSA workbech and perform Topo for the entire body
• Check for geometrical errors like triple cons, needle faces using checks manager and fix them
• extract a mid surface using either offset option or mid surface skin option
• There are several features in the geometry. Mid-plane/skin is extracted for each and a seperate PID is also assigned basing on it's thickness
• Options used to extract midsurface are Offset, Midle, Extend & Intersect
• Input quality criteria values in Qulaity criteria-presentation parameters tab and also in mesh parameters tab
• Batch meshing is carried out to obtain complete mesh for the component in a single step
• Using Model browser, this mid surface is assigned as a new part
• In Batch mesh manager, a new Meshing Scenario is created to the new part crated earlier
• By inputing the quality criteria along with mesh parameters, the command is set to Run and mesh is generated
• The mesh at some areas needs to be worked so as to achieve proper mesh flow
• At some areas, ANSA might have cleared/joined cons to achive mesh, but that can be a distorsion to the feature at that location
• So, manual correction at these areas is carried out to capture the features along with a better mesh flow/pattern
• Options to work on mesh are Batch mesh, Spot mesh, Reconstruct, Split & Swap

Images for reference:

Link:https://drive.google.com/drive/folders/1N60p9vWAKATYSbSgVUsylSSOYZs7PiZk?usp=sharing

Learning Outcomes:

• The given IP substrate component is a complex model with many features like ribs and capturing them in FE model within the quality criteria is a difficult task
• Learned meshing for complex models by combining automatic options and manual working which gives a better result

Conclusion:

• Mid surafce is extracted and seperate PIDs are assigned as per their thickness
• Meshing is done within the quality criteria values