Assignment 1-2D Meshing Challenge

OBJECTIVES :

1. To clean the given geometry without any free edges.
2. To extract the mid-surface for the given component.

PROCEDURE :

• The given model is imported (.hm file) in HyperMesh window. Here 3 models are given for midsurfacing and meshing.
• The component display mode is changed from auto to by topo.
• In order to clean the free edges which are highlighted with red boundaries are surface filled using the filler surface option or toggle edge in quick edit.

• On switching to wireframe geometry, the free edges in the component are cross checked and incase of no free edges the geometry is switched back as shaded geometry.
• Thus the given component is made clean from free edges and the model is made ready for midsurfacing.
• For midsurfacing, one of the four auto-midsurfacing methods is preferred based on the model to be midsurfaced.

• For the given models, holes less than 5mm diameter are neglected and surface filled in those region.
• The midsurface is automatically kept in a separate collector and the criteria file settings is fed as input for meshing.
• The 2D meshing is done using automesh option - mixed element type and the target element length here is 5mm.

• For element cleanup options such as swap edge, split/collapse edge, smooth etc are used and the mesh is made proper.

• After meshing thickness is assigned to the mesh by creating a property card. Finally after meshing and thickness assigning the model is saved.

CAD MODEL IMAGES :

MODEL 1:

GIVEN MODEL

MESHED MODEL

MODEL 2:

GIVEN MODEL

MESHED MODEL

MODEL 3:

GIVEN MODEL

MESHED MODEL

CONCLUSION :

    Thus the given 3 models are initially processed for geometry cleanup then midsurfacing and meshing is done. Finally thickness is assigned to the mesh successfully.