Week 6-Meshing of Hood Challenge

OBJECTIVE: To Mesh the Hood component within the quality criteria and proper mesh flow.

CAD MODEL:

PROCEDURE:

• Importing geometry and cleanup:

-To import the geometry, go to file ->> Import ->> select the file ->> Import.

-After importing the geometry, the geometry is checked for any missing surfaces or triple cons. If there are no errors present in the geometry then the geometry is ready for the mid-surface extraction.

• Extracting mid-surface and assigning properties:

-Mid-surface can be extracted by any of the 4 methods below.

1. Offset + plane + sweep.
2. Offset + plane.
3. Offset
4. Skin Offset.

• To extract the mid-surface, go to geom ->> mid-surface ->> select any extraction option ->> select the surface ->> extract. In this challenge offset + plane + sweep is used.
• After extracting the mid-surface, it is checked for any geometrical errors like needle faces, missing surfaces and triple cons. If any of the errors present then it should be rectified immediately.
• Now the properties like thickness, Material etc. need to be assigned to the mid-surface. To assign the properties, select model in database and right click and choose create and then property.
• Now all the properties are entered in the property tab and the properties are assigned to the respective mid-surfaces.
• To assign the properties to mid-surface, right click on the mid-surface and then select assign and select the respective properties which needs to be assigned.

• Meshing the surface with in the given quality criteria.

-Since this component is axis symmetric, we can cut it in to half and mesh it. now we can mesh at last.

Generating mesh within the given quality criteria:

• Before generating mesh, the geometry is cut into smaller rectangles for good mesh flow.
• To generate mesh, go to 2D >> automesh >> select the surface >> mesh. To edit the mesh for proper flow, the elements are selected and meshed again.
• If any elements are failing for quality then cleanup tools option which is present in quality index can be used.

• Complete the mesh of the hald portion of the Inner Extract as shown in above image.
• Now we can reflect the elements on the other side and complete the total mesh on the component.

• As shown in above image, elements are reflected on the other side.
• Make sure that elements are in proper connectivity.
• Thus we completed the Meshing process of hood.

FINAL MODEL:

CONCLUSION:

Performed batch meshing with the given parameters, assigned material & proprty cards, and quality criteria are checked.

Based on the method, the following observation can be made:

Important thing in meshing is mesh flow, which should be followed by the given geometry.

Make sure that tria elements do not break the flow of the mesh.