Geometry Cleanup in HyperMesh

Objective:

In this Report, I will conduct the Geometry Cleanup for 3 CAD models:

• Practice
• Clip Repair
• Mounting Bracket

The purpose of Geometry Cleanup is:

• Refine the Geometry
• Create reasonable mesh
• Assign proper thickness

The procedure is as follows:

• Step 1: Import CAD model.
• Step 2: Clean the geometry: delete bad edges, delete temp nodes, fill surfaces, toggle edges with tolerances, ...
• Step 3: When the topology is good, conduct the midsurface extraction.
• Step 4: Look for holes with diameter smaller than 5 mm and delete them.
• Step 5: Create mesh for the whole model with average element size 5 mm and refine the mesh according to Mesh Quality Criteria.
• Step 6: Assign a proper thickness.

Results of Meshed Models:

1. Part 1:

• Mesh:

• Mesh Metrics:

2. Part 2:

• Mesh:

• Mesh Metrics:

3. Part 3:

• Mesh:

• Mesh Metrics:

Conclusions:

• The geometries were slightly modified to facitilate meshing.
• The geometries have thickness smaller than 2 mm --> we can simplify them as shell property using the function midsurface.
• To avoid bad elements, holes with diameters smaller than 5 mm are filled.
• The final mesh sizes stay within ranges of mesh quality criteria.

Attachments:

https://drive.google.com/drive/u/2/folders/1sy5P5cNoYnPG6eApjyRNt-rJJ58HBKiW