Modified on
03 Aug 2022 11:34 am
Skill-Lync
Tetrahedral is a four- nodded solid element that 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. The image attached below is a representation of a Tetra element. The Tetra element will have 4 triangular faces with four nodes joining them together (refer to Fig 1).
Below are the three methods to generate Tetra Meshing:
As per the above classification, we are going to mesh a component and clear the Tet collapse value:
Steps to be followed to generate Tetra Mesh:
Steps to be followed to generate Tetra Mesh:
Note:
It allows more Trias/ Tetras elements to be generated along the curved surfaces based on user-specified settings.
It will apply an extra stage of calculation to improve the overall mesh quality by removing some nodes and combining elements. Meshing will fail if the shell elements of solids are present and are conflicting with the selection, when this occurs, the elements are cleaned up accordingly.
Example:
Hint:
What is Tet Collapse?
Tet collapse is one of the quality parameters, which will be checked while generating Tetrahedral elements. It can be calculated by measuring the distance of a node from the opposite face, and then each of the four values will be divided by the Square root of the opposite face’s area. The minimum of four resulting values is then normalized by dividing it by 1.24.
Generally, tet collapse can be calculated by the formula = Min of (h/√A) ÷ 1.24
In that formula,
“h” represents the Height, between the Node (N1) and the opposite face of the Triangle.
“A” represents the Area of the Opposite Face (area of the Triangle).
There are two methods to clear the Tet collapse as stated below:
Steps to be followed to clear the tet collapse:
Steps to be followed to clear the tet collapse:
Note:
Hint:
Before working on the Tetramesh panel, it is advisable to fix the “Tetramesh parameters”.
Author
Navin Baskar
Author
Skill-Lync
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