Challenge

Week 11-3D Tetra Meshing Challenge

JJagan K12 May 2023

3D Tetra Meshing Challenge

Objective:

To Create a Teramesh for three models and check for tet collapse in the given components using Hypermesh.

Procedures:

Model 1:

Geometry Import

The Housing Component is imported. The model is next checked for any missing surfaces or triple cons. The imported component is shown in Figure 1.

Figure 1: Imported Housing Component

Quality Criteria

The quality criteria has been assigned as per the given data by Preference + Criteria File Settings. In the Criteria Editor dialog box as shown in Figure 2.

Figure 2: Criteria Editor dialog box

Meshing

Delete the solids on the model and with the model surface create a 2-D mesh by

Command : 2D+ automesh+ surface+ tria-element+ mesh.

Convert 2D tria mesh in to 3D tetra mesh by

Command : 3D + tetramesh+ select the element+ mesh.

3D Tetra meshed component is shown in figure 3, 4, 5& 6

Figure 3: Meshed Inner housing model

Figure 4: Masked Inner housing model

Figure 5: Meshed outer housing model

Figure 6: Masked Inner housing model

Tet collapse - Element quality

In order to know the tet collapse use

Command: Tools+ check elements+ 3d+ tet collapse+ save failed

By reverse masking mesh elements the failed elements can be seen separately as shown in figure 7.

Figure 7: Failed mesh elements

By changing the distance in each elements failed elements ate removed as shown in figure 8,& 9.

Figure 8: Quality checked outer housing meshed model

Figure 9: Quality checked inner housing meshed model

Model 2:

Geometry Import

The model 2 is imported. The model is next checked for any missing surfaces or triple cons. The imported solid component is shown in Figure 10.

Figure 10: Model 2

Quality Criteria

The quality criteria has been assigned as per the given data by Preference + Criteria File Settings. In the Criteria Editor dialog box as shown in Figure 11.

Figure 11: Criteria Editor dialog box

Meshing

The solid model is directly 3D tetra meshed by

Command : 3d+ tetramesh+ volume tetramesh+ comps+ mesh

3D Tetra meshed component is shown in figure 12

Figure 12: Masked 3d tetra meshed model

Tet collapse - Element quality

In order to know the tet collapse use

Command: Tools+ check elements+ 3d+ tet collapse+ save failed

By reverse masking mesh elements the failed elements can be seen separately as shown in figure 13.

Figure 13: Failed mesh elements

By changing the distance in each elements failed elements ate removed as shown in figure 14.

Figure 14: Quality checked Model 2.

Model 3:

Geometry Import

The Model 3 is imported. The model is next checked for any missing surfaces or triple cons. The imported assembly component is shown in Figure 15.

Figure 15: Model 3 - assembly component

Quality Criteria

The quality criteria has been assigned as per the given data by Preference + Criteria File Settings. In the Criteria Editor dialog box as shown in Figure 16.