Assignment 1-2D Meshing Challenge

Geometry Cleanup Exercise: (Note: All the .hm models are done Radioss profile)

Carry out the geometry cleanup operation on the given 3 files.

• Practice
• Clip Repair
• Mounting Bracket

There should not be any free edges, convert all of them into refine geometry.

• Clean the geometry.
• Extract midsurface.
• Clean midsurface geometry.
• Ignore holes less than dia 5mm.
• Create 2D mesh with target length 5mm, min 3.5mm max 7mm.
• And assign proper thickness, by creating a generic property.

Target Element Length = 5mm

Importing the model.

Creation of Missing Surfaces:

Geom -- > Surfaces -- > Splines/Fillers

• The model is cleared of free edges.

Creating all the mid-surface:

• Select the model to which the mid surface is to be created.

• Mid surface is extracted.

Now start meshing mid-surfaces:

Cleanup:

After creating all missing surfaces, deleting all extra surfaces, and ready the geometry for cleanup.

• As the holes are less than 5mm they are cleaned up.

• Clean up is completed and the model is ready for automesh.

Creation of Mesh: 2D -- > automesh

• Enter the required mesh dimension(5).
• Selection of the surfaces to mesh and press mesh.
• Need to re-mesh locally if required.
• Or we can also mesh optimize.

Qualityindex : 2D -- > qualityindex

Check Elements for Quality : Tool -- > check elems (F10)

• After all the elements are checked for size the mesh is completed.

Assign proper thickness:

• Found the thickness to be 0.9 mm

• Property is created and required thickness is assigned.

• Property is assigned to the model.

• Completed model with thickness assigned.

Similarly, the model 2 and 3 are done.

Model 2:

Importing the model

Creation of Missing Surfaces:

Geom -- > Surfaces -- > Splines/Fillers

• The model is cleared of free edges.

Creating all the mid-surface:

• Select the model to which the mid surface is to be created.

• Mid surface is extracted.

Now start meshing mid-surfaces:

Cleanup:

After creating all missing surfaces, deleting all extra surfaces and ready the geometry for cleanup.

• Clean up is completed and the model is ready for automesh.

Creation of Mesh: 2D -- > automesh

• After all the elements are checked foe size the mesh is completed.

Assign proper thickness:

• Found the thickness to be 2.0 mm

• Property is created and required thickness is assigned.

• Completed model with thickness assigned.

Model 3:

Importing the model

Creation of Missing Surfaces:

• The given model is a perfectly closed model without any free edges.

Creating all the mid-surface:

• Select the model to which the mid surface is to be created.

• Mid surface is extracted.

• Cleaned up model ready for meshing.

Creation of Mesh: 2D -- > automesh

• Enter the required mesh dimension(5).
• Selection of the surfaces to mesh and press mesh.
• Need to re-mesh locally if required.
• Or we can also mesh optimize.

• After all the elements are checked for size the mesh is completed.

Assign proper thickness:

• Found the thickness to be 1.8 mm

• Completed model with thickness assigned.