Week - 4 - 2D meshing for Plastic components

Objective:

For the given Plastic Bottle Cap model, check for the geometrical errors and take the mid surface by suitable mid surfacing techniques. PID and Thickness assignment has to be done for all the mid surfaces. Mesh the same with given element Quality criteria. (Refer to the table below for the Quality criteria)

S.No	Quality Criteria	Value
1	Target/Average length	1
2	Minimum Length	0.5
3	Maximum Length	3
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

Forgiven model

Import the model first. Now check the geometry for any errors like single con, needle face, crack surfaces using the checks-geometry tool in the menubar. after that
select execute and select all the errors and right-click-fix to fix those errors.

Now select the mesh-perimeter-length tool and give 1 as a value to refine the macros and perimeter of the model for a good resolution to see the component.

Now the thickness of the two surfaces is the same overall we should use the offset option topo-faces-offset. assign value as half of the thickness and select the
faces to offset. give negative value when the arrow in the opposite side. click ok and click no to delete the surface for further reference.

To separate the surfaces for taking mid surfaces.

Now assign the thickness for the mid surfaces. we have some varying thickness surfaces so that we have to create gradual thickness variations under one surface. we can create property easily. select property-new-pshell-assign thickness-assign name

Now give quality criteria for the mesh. Select quality criteria and assign values as given in above. select presentation parameters. select elements
percentage.now click ok

Now we can move to mesh the model. first set the mesh parameters. give target element length as 1mm, min length as 0.5mm, max length as 3mm.
select ok.

First, select the macros and select the best mesh in the mesh generation (mesh-mesh generation-best). now the mesh is generated in the selected macros.
follow the same procedure for mesh generation.
Now use reconstruct tool for remesh the existing mesh (mesh-shell mesh-reconstruct).

CONCLUSION:
Performed manual topology cleanup, mid-surface extraction, and 2D meshing of the given model.

mesh the component satisfying Quality Criteria with better mesh flow.

Successfully meshed the component based on input quality criteria.