Week 4

BOTTLE CAP 2D SURFACE MESHING

Objective:

To create 2D meshing on bottle cap model as per the quality criteria and assigning thickness to the multiple objects in the model by using ANSA

Understanding the sequence of steps to prepare the 2D mesh as per the Quality Criteria

1. Saving the ANSA settings asper our requirement.
2. CAD model or any 3D model.
3. Converting the file Solidworks model or CAD model into IGS (any ANSA supporting format).
4. Preparing the model for geometric clean-up.
5. Generating mid-surface by using auto or manual mid-surface generation method.
6. Assigning thickness and set part ID or property Id for the mid- surface.
7. 2D meshing as per the Quality criteria given.

Methodology:

• Geometrical clean-up
• Mid surface Extraction
• Meshing as per the Quality criteria
• Thickness assigning to the model

Cad model: To get clean model need to perform the topology and length perimeter before going for geometrical clean up

After topology

Geometrical cleanup:

After geometric clean-up

Extracting Mid-Surface:

Extracting mid surface using MIDDLE command:

Auto mid-surface extraction through casting but it generated distorted elements in the model

To get proper mid surface we need to use the following tools:

• Offset
• Middle: single and multi

MESHING:

Before going to mesh the model we need to update the quality criteria and mesh quality as per the given quality data for the bottle cap.

We need to choose the following details to get proper or smooth mesh.

• Mixed elements
• Ist order
• Type of mesh: batch, best etc

• Why we chose batch meshing:
  • Gives perfect and smooth meshing
  • Reduce the time
  • It gives uniform mesh and less trias in the mesh quality

Outcomes:

• Able to do the geometrical clean-up
• Mid-surface extraction is done
• 2d meshing

Conclusion: 2D meshing for bottle cap is created after the geometrical clean up and also assigned thickness to the model using ANSA.