3D TETRA MESHING

ABSTRACT:

To create a 3D TETRA MESHING using the given quality criteria file and check for the quality at the end of the meshing. THe 3D mesh is achieved by boing the 2D mesh first and the 3d mesh is done finally.

TETRA MESHING:

Tetrahedral is a four- nodded solid element which can be generated through the tria element by creating a volume and also through the existing volume of the geometry. These elements are used where the geometry has high thickness and complexity.

TET COLLAPSE:

3D tetra mesh created were checked for Tet collapse (defect generated when the height of tetrahedron 3D element is less than the target element length). Tet collapse defects were cleared by re meshing the failed elements and changing the height of tetra element by translating nodes. The industries follow the default tet collpase value should be greater than 0.15.

Input model:

The given model to do 3d meshing is Housing.

To achieve 3D meshing there is no need to take mid surfacing. Directly the 3d tetra meh is done.

2D meshing:

The 2d mesh is done through the 2D--->automesh. The element size is 5mm, minimum element size is 2mm and the maximum element size is 7mm.

Then the 3D tetra mesh is done through the command menubar(view)--->browser--->hypermesh--->

utility--->geom/mesh.

The tetra mesh is done through the command 3D--->tetramesh.

To assign the quality parametres in tetramesh The Tetramesh parametres tab is used.

3D tetrameshing:

To check the Tetcollapse:tools--->checkelements--->3D--->tetcollpase.

Similarly for the other 2 models the smae procedure is followed to achive the tetrameshing. The element size followed here is 6mm.

Model2:

Model3: