ansys workbench problema per avere mesh regolare

[Armanto]

Hello everyone,

for university we are designing an anthropomorphic manipulator robot.
in performing the fem analysis of the links we are using ansys workbench, but we found problems in getting a regular mesh. in fact with a perfectly rectangular arm the mesh is perfect.
when we put in the same arm a single hole comes the problems. the mesh becomes irregular not only at the hole (as it is right to expect), but also in the rest of the arm. along the whole arm, the mesh at times is almost regular, while in other points, ''inexplicably''', it sticks and gives rise to robes each with dimensions totally different from the other.
we will want to understand if there is a simple and fast method to get, at least in the parts where there are no holes, a regular mesh.

Thank you.

 

[volaff]

see if this simple video of a perforated plate can help you.
http://www.youtube.com/watch?v=s06no6hd2hc

purtroppo non ho mai usato ansys workbench, ma solo il classic.

 

[Armanto]

Thank you! Unfortunately, however, to us the mesh that we see at the minute 2.17 is much more irregular, perhaps because the hole is on the end of the rectangle and not at the center. As far as the mesh is concerned, 5.02, according to our professor, is too irregular. What level of irregularity is only good when we do the utlimi refinements in the final analysis.
but with the classic you can have ''automatically''' a regular mesh?

 

[volaff]

"automatically" I don't honestly think, but I might be wrong.

of course the mesh should not be free, but it must be done "ad hoc".

 

[volaff]

you could make a mesh with an "outside" program and then import it into ansys, but I don't know how much it agrees!

 

[FEA_3D]

hi now I don't honestly know what version you're using... However in the starting settings of the mesh... changes all "coarse" settings in "medium" or "fine". where you find assembly put part... (so by doing you will have a thicker mesh and elements that pass from small to fag more gradually) then you can with the selection of edges... click the edge of the hole... element size.... number of divisions... put at least 16 (minimum number on 360°). then with the selection of the inner face of the hole... button dx... insert "mapped" in this way the tetrahedral elements are mapped as regular rectangles with an oblique element. if you want everything more or less dense act on the mesh size by selecting the volume... I hope I helped you.... hello