Week 8-3D Tetra Meshing Challenge
1. procedure
>firstly the given model of three model of different methods.
>then , download of models
>import the model geometry
>question image
>1method-conversion of 2D tria elements into tetrahedral element, by using (tetra mesh panel)
>import model
>given housing component
>model 1.
>By topology view:
>First given surface generatating the 2D mesh with auto mesh option in 2D panel
>see the given length of values min, and maximum and target length of element
>After generating the 2D mesh, then go with tetra mesh,
>select-3D option-tetramesh-select trias and quads option-and mesh
>Given the element size
>check whether generated or not of 3D mesh
>while i was deleting the few of element , then i was checking
>then, finally check the quality of parameter (shortcut key f10)
>checking with 3D panel - test collapse
>then check the status bar, there visible of failure elements
model 2:
>given model image in below , same of 1 method process
>first given surface , generated the 2D mesh with auto mesh option in 2D panel
>see the given length of values min and maximum and target length of element
>after generating the 2D mesh, then go with tetra mesh,
>selected-3d option-tetramesh-select trias and quads option -and mesh
>given the element size
>check whether generated or not of 3D mesh
2METHOD - tetra mesh by using ''quick tetra mesh, from the utility panel.
>PROCEDURE:
>imports the model
>Given crank model and below the question
target element size 3units
tet collapse 0.15
>then, go with 3D mesh - tetramesh - select - elements/comp
>check the status bar, while mesh the comp/element
>showing the error of the mesh is not enclosed,because the 3D mesh , whether any any missing surface or hole are the same of reasons.
>then i was going with option utlity
> then go with option of geome/mesh
>click the geom/mesh option (visible of mesh tools-quick tetra mesh)
> then set all parameters valves
> finally click on mesh option
>The 3D mesh is generated
>check the quality parameters (shortcut key f10 )
>check with test collapse (elements failure is 0.001)
>
3method - tetra mesh, by useing the ''volume tetra mesh panel''
>PROCEDURE:
>import the model
The given assembly model create a 3D tetramesh with the following quality criteria target element size:6 units
test collapse:0.15
> the hub and center hub are in the surface geometry body>
>Then go with 3D panel - tetramesh -''VOLUME TETRA '' option
>Then generated the mesh with accordingly surf/solids body
what is Tet collapse
Tet collapse is one of the quality parameter , which will be checked while generaded tetradral element. it can be calculate by meausring the distance of a node from the opposite face, them each of the four values will be divided by the same squre roots of the opposite face's area. the minimum of four resulting values is then nomalized by dividing.
generally tet collapse can be calculated by the formula = min of (h/rootA)/1.24
H = the hight between the node(N1) and the opposite face of the triangle
A = The area of opposite face (area of the triangle)
method to clear tet collapse
1. using the ''translate'' command to increase the height.
2. using the ''Tetra remesh'' panel, to remesh failed elements.
Use of proximity :- It refines the mesh in area where the features are small and colse togther and also it eases the smooth transition from small to large element.
use of curvature :- It allow more tires/tras elements to be generated along the curve surface based on user specified setting.
use of cleanup elements :- It will apply on extra stage of calculation stage calculation to improve the overall mesh quality by removing some nodes and combining elements , meshing will fail if the shell elements of solied are presents and
UNDESTAND BY TOPICS:
. how to generated 3D tetramesh
. how to use the different method while doing the tetramesh
. how to check element quality and test collapse
. how to remesh while failure of elements again
CONCLUSION:
. generated the tetra mesh of given different models
. Checked the mesh quality parameter should passed