Week - 4 - 2D meshing for Plastic components

AIM:- To mesh the plastic bottle cap model with given quality criteria.

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

PROCEDURE:-

1. First import the given model in ANSA, File>Open

2. Go to Tool>Checks>Geometry for geometry clean up after importing the CAD model successfully in ANSA.

3. After clicking on execute, all errors related to the model are shown which can be fixed with an automatic fix option available. But the errors which are not possible to clear can be clear manually by using different options in topo

4. Model after geometry cleanup.

MID SURFACE CREATION:-

1. Now mid-surface is donewith various methods. The mid surface can be done by the automatic method also. Most of the time faces>offset option is used for mid surfacing and the PID is set manually. In the automaic option i.e. faces>middle the PID is set automatically. Sometimes the middle curve is taken wherever necessary and then the faces are created by joining the curves.

Meshing:-

1. After genereting the mid surface, we will move towards the meshing.

2. Set the given Quality Criteria Utilities>Quality criteria option and assign the given quality criteria values.

3. Go to Utilities> Mesh Parameters and assign the average value. minimum and maximum value for 2D Meshing.

4. Go to Mesh>Perimeters>Length option and select the component to mesh and enter the value pf perimeter length and macro length for meshing.

PERIMETER IMAGE

MACRO IMAGE

5. Go to Mesh>Mesh Generation Best Mesh

6. Go to Shell Mesh>Reconstruct to rearrange the mesh and use Shell Mesh>Smooth option to smoothen the meh flow.

7. To eliminate, minimize the trias for getting better mesh flow use Element>Split/Swap/Joint option and also Grids-->paste option.

8. Go to Quality Parameter>Presnetation Parameters and select Draw shel as solid, click Apply and ok

LEARNING OUTCOMES:-

1. Learned that how to remove the geometry errors from model.

2.Learned mid-surfacing the complex component with varying thickness.

3. Learned the 2D meshing for the comples molded component.

CONCLUSION:-

Using given quality criteria, the bottle cap is meshed successfully with a minimum percentage of tria and apply the thickness to the given model after meshing is done.