Week - 5 - 2D meshing for Plastic components

OBJECTIVES: To extract the midsurface & mesh the bottle cap component with given quality criteria.

CAD MODEL IMAGE:

PROCEDURE:

First import the CAD Model in ANSA Software or interface, then initial perform Topo after perform Topo Geometry checkup in this procedure we need to check for the following Geometrical errors present in the model like crack, overlap face, needle face, triple con, unchecked faces etc.

1. DO THE TOPO: To connect the Geometry each other.

2. GEOMETRY CHECKUP: To check the Geometry cleanup.

After the checkup fixing the errors if any, we can achieve this either by Manually or Autofix, hence all the CAD models were check for clean geometry and all their surface imperfections are fixed in the geometry check. after this procedure, geometry is free from error as we can see in below image.

3. MIDSURFACE GENERATION:

Midsurface here taken by manual operation instead of Automid.

With the use of offset option midsurface is generated in the area having same thickness value.

In this model we have trapezoidal surface where offset method will not work so we can use different method to generate midsurface.

So, for these areas we have to generate the curve at the middle by selecting both side cons.

Then those curve will be projected to surface & midsurface will be generated by using faces- new option.

We gave some ribs features, for which faces-middle option is used for midsurface generation.

INNER FEATURES:

TEETH:

Assign PID: After generating the midsurface for all the region, a new PID is to be assign for the midsurface.

4. MESH GENERATION:

Before generating mesh, mesh parameter & quality parameter need to be set.

Now select Best mesh from mesh generation menu & select the area.

One should use smooth option after mesh generation & even after reconstruct option for better mesh flow.

Use split, swap, paste command to reduce the trias and good mesh flow.

Now select draw shell as solid from Quality Presentation parameters.

5. FINAL MODEL:

6. RESULTS:

1. Generation of misdurface for plastic model having varying thickness .

2. Commands like curve generation & project cons faces middle options etc.

3. Plastic Model is meshed with given quality criteria by assigning thickness value to various region.