Challenge

ANSA_PROJECT 5 - MESHING OF BOTTLE CAP

AIM :

To extract the midsurface and mesh the given bottle cap component under given quality critiria.

Quality cretiria :

Procedure :

Step 1 : Importing the component

Step 2 : Seperation process

Step 3 : Geomentry Cleanup

By using the manage lock option, show the particular working component in workspace
By using the ORIENT option, modify the faces of the component
By using the FINE option, change the resolution of the curves and cons
Cleanup the geomentry, by using the various commands shown below
After the geomentry cleanup, go to checks > geomentry for fine cleanup, that we missed
And click the execute, and execution process must shown as 100% and status as green mark as shown below
If there is any errors shown, Try the FIX option by right click the error or fix it manually

Step 4 Creating Mid surface

After geomentry cleanup, Measure the thickness of the component
For measuring thickness, use the MEASURE command in the UTILITIES option
In the measure option, Choose selection as Nodes and select the two nodes, as shown below
Check the tickness of component across various places to ensure the same thickness

Then select the OFFSET option in FACES command.
Then select the face option and click either upper surface or lower surface of the component.
Then click the FEATURE command to select the overall upper surface of the given component.
Then click the middle mouse button and give the offset distance( THICKNESS / 2 ) and the click ok.
Then click no for deleting the parent component.
Now midsurface for this component is created.

Step 5 : Preparing for mesh

Again by using the FINE command, we improve the resolution of the 3D curves
Then change TOPO to MESH mode
Then select the LENGHT option in the PERIMETER command
Select the perimeter and the select the whole component and give lenght as 5 because of our target lenght is 5

Identify the place where lenght between the two nodes is less then 0.4.
By using the CUT and JOIN command alter the surface cons with minimal defeature
Once again check the geomentry for our mid surface by using the checks > geomentry option.

Step 6 : Assign Quality cretiria

Then, click the MESH PARAMETER command in the UTILITIES
In that mention the target element size, minimum and maximum element size and the click OK

Step 7 : Meshing

By using the RECONSTRUCTION and SPLIT commands give the better mesh flow for that surface
Avoid Tria elements at fillets. Eliminate them by using Swap, Split and Join commands
No mesh Transition on constant radius fillets/curvatures.
It is always preferable to have two or more rows of elements at fillets so that the FE model will capture the curvature.In one fillet there should not be variation in number of rows throughout.
To create two rows of elements, Split by Edges can be usedCircular holes aInstead of zig zag mesh pattern, a structured or smooth mesh is recommended.
i.e. Nodes should be aligned in the same linere much important in Durability, Fatigue and NVH analysis.
So it should be modeled carefully with at least one layer of quad elements around the periphery of a circular hole.
Tria elements will add stiffness so it is not desired to have tria elements .
These above steps has to be followed for aother componwnts also

step 8 : split, Join, swap and paste commands

Step 9 : Apply Property

After doing the mesh for all components, we have to assign the thiskness for the individual components
For that click the property icon in the LIST command
Then assign the Thickness for the individual component

Step 10 : Assign the material

Overall Final Component :

Result :

Thus the Mid surface and meshing for the given bottlecap component under given quality cretiria is done successfully.

Ship work like this
in your own course.