Week - 4 - 2D meshing for Plastic components

AIM :- 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.

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

12. Tria Percentage 15

Procedure :-

1. After downloading the bottle cap model given by skill lync, the model was studied. it was fund out that the model was not oriented properly. therefore the first step undertaken was orientation of the model.

2. Next step undertaken was to undertake the geometrical checks. During geometrical checkups few errors were observed. the same was rectified.

3. Next step undertaken was midsurface generation. post generation of the mid surface the geometrical check ups was again undertaken. No error was reported on the model.

4. Quality and Meshin criteria as given in the challenge was then defined in ANSA. and Model Meshing was undertaken.

5. Post meshing was completed it was found that few meshed elements were nor qualifying the quality critera, the same was rectified and the final model was saved in the directory.

Results:-

3D MODEL

MIDSURFACE

FINAL MESHING

3.

3D SHELL ELEMENTS WITH ASSIGNED THICKNESS

Conclusion :-

1. Few of the OFF ELEMENTS have been formed in the in the critical areas near ribs and the region with smaller thickness.

2. Total 9581 elements are generated during meshing on the midsurface out of which 9307 is quad elements 274 trias. And out of total 9068 elements 59 elements are OFF elements considering the given quality criteria.

3. in order to pass all those OFF ELEMENTS the quality criteria can be altered as per the standard of the client/user industries requirement.

Learning :-

1. Few of the commands such as FACE>>EXTEND, CURVE>> MIDDLE and FACE >> MIDDLE was used in this challenges.

2. Learned about the technicality on the observation on Tripple Coons.

3. Learned to use batch mesh in the given challenge

4. One should always check the quality criteria and mesing perimeters every time ANSA app is turned onn. As it doesnot load those settings by default.

Link for the Meshed Model :-https://1drv.ms/u/s!Au2Btld-lB2KgcViU9yKojpCUi2KfA?e=HcjFE6