Week 3 - 2D meshing for sheet metal

Aim:

To check for geometrical defects, do a mid-surface extraction, mesh the component using the specified element Quality criteria, and then assign the component a thickness.

Procedure:

1. Component Study
2. Geometry clean up and Material assignment
3. Mid Surface extraction
4. Meshing

Components Study:

Outer Panel:

Outer Panel Thickness = 0.75mm

Inner Panel:

Inner Panel Thickness = 0.75mm

Hinge:

Hinge Thickness = 1.2mm

Latch:

Latch Thickness = 1.2mm

Geometry clean up and Material assignment:

For Undefined Material:

In PROPERTIES, we can see how many geometry components there are.

depending on the number of property IDs present

In MATERIALS, you can see how many material attributes are accessible and whether or not they are specified.

If not, tick the box to assign the content.

Then, in the checks manager, look for undefined materials.

Check The Geometry:

Before meshing, we must first validate the geometry with CAD.

Geometry check is provided in the drop down menu of checks.

If there are any problems, select Auto Fix to repair the broken geometry.

After autofix is done

Mid Surface Extraction:

Using the auto and manual midsurface tools, extract the midsurface for the components. For automatic midsurface (topo-faces-midsurface), manual midsurface (topo-faces-offset)

Meshing:

Mesh parameters:

select the mesh parameters tab (utilities-mesh parameters & quality parameters).

Quality criteria:

To achieve a decent mesh, utilise the best mesh option. There are various meshing algorithms in ansa; try them out to achieve a correct mesh flow (mesh-mesh generation-best)

Here we go for mesh editing by using a variety of tools such as reconstruct, divide, join, swap, and paste to remove opposing trias, back-to-back trias, and rotating quads from the mesh. Use these tools to remove the unneeded trias and rotating quads described in the trias management rule.

Finally, double-check the quality requirements outlined above, as well as the precise mesh alignment in all elements.

Outer panel:

Inner Panel:

Latch:

Hinges:

Conclusion:

The hood components were meshed in accordance with the quality requirements, resulting in a correct mesh flow and component thickness.