Week 8-Challenge

Objective: To create a 3D tetra mesh using Tetra mesh and solid meshing techniques. The tetra elements created must have a tet collapse greater than 0.15 and for the shell elements, the criteria are min size = 2mm, max size = 7mm with a target size of 5mm.

Procedure:

• Housing Model

1. Go to import > import geometry > click import.
2. Go to delete > change the entity to solids > select all > delete entity.
3. Go to defeature > surface fillets > radius range (2 - 7 mm) > select all surfaces > click find > click remove fillets
4. Check for distances between two edges and if they are less than 2 mm then one of them has to be toggled or joined depending on the circumstances.
5. Go to 2d > automesh > set target element size to 5mm > change element type to trias > select all surfaces > click mesh.
6. Go to check elements > save failed > go-to mask > retrieve > click mask > then reverse all. Unmask attatched elements.
7. Edit the failed elements using the edit element tool, split tool, and other cleanup tools in the quality index tab.
8. After all the 2d elements have qualified the given criteria, go to 3d > select tetra mesh > click tetra mesh parameters > set the 3d mesh criteria of tet collapse (>0.15) min size 2mm maximum size 7mm.
9. Go to tetra mesh > select all the elements > mesh.
10. Go to check elements > select 3d > check for tet collapse (0.15). If elements have failed then save them and increase the height of the tetra element.

• Model 2

1. Go to import > import geometry > click import.
2. Go to delete > change the entity to solids > select all > delete entity.
3. Go to defeature > surface fillets > radius range (2 - 7 mm) > select all surfaces > click find > click remove fillets
4. Check for distances between two edges and if they are less than 2 mm then one of them has to be toggled or joined depending on the circumstances.
5. Go to 2d > automesh > set target element size to 5mm > change element type to trias > select all surfaces > click mesh.
6. Go to check elements > save failed > go-to mask > retrieve > click mask > then reverse all. Unmask attatched elements.
7. Edit the failed elements using the edit element tool, split tool, and other cleanup tools in the quality index tab.
8. After all the 2d elements have qualified the given criteria, go to 3d > select tetra mesh > click tetra mesh parameters > set the 3d mesh criteria of tet collapse (>0.15) min size 2mm maximum size 7mm.
9. Go to 3d > click tetra mesh > select all the elements > mesh.
10. Go to check elements > select 3d > check for tet collapse (0.15). If elements have failed then save them and increase the height of the tetra element.
11. Follow these steps for all the components of one side of the model.
12. Go to distance > select 2 of the similar points in either side of the model > then click on points between.
13. Go to reflect > select all the elements > select method as y-axis and base method > select the point created as base point > click reflect.

*For this model as the nodes exceeded the limit of the student license the elements of two parts from the reflected components had to be deleted.

• Model 4

1. Go to import > import geometry > click import.
2. Go to 3d > select tetra mesh > click tetra mesh parameters > set the 3d mesh criteria of tet collapse (>0.15) min size 2mm maximum size 7mm.
3. Go to check elements > select 3d > check for tet collapse (0.15). If elements have failed then save them and increase the height of the tetra element.
4. Select the volume tetra > change element size to 6mm > select the solid > click mesh.

Result: The given models were meshed using the given procedure and ensured that they satisfied the given criteria.