Hello every one ,
I'd like to mesh a cylindrical cavity using quadrangle elements along the lateral surface of the cylinder (16 or 32 for example ) and triangular elements at the inlet and the outlet .
So, please How to create this mesh and generate a .dat file .Thanx
First at all prescribe meshing attributes to the geometry using command "MESH > MESH CONTROL > ATTRIBUTES TO SURFACE". This command is critical as allows you to prescribe not only the type of 2-D element (TRIANGLE or QUAD) but also assign the property (Shell thickness) + material to the geometry.
Repeat command, one for the lateral surfaces and another time for the inlet/outlet surfaces.
Also, avoid to use TRIANGULAR elements at all, QUAD is immensely better (both mesh quality & accuracy on results), simply activate flag "QUAD EDGE LAYERS = 2" and FEMAP will use two layers of QUAD elements in the boundary:
thank you Blas Molero ,
Sorry for this late answer.
I programmed all the mesh in matlab. Nontheless, I tried to do it on Femap.
Actually, Im not familiar to it. I used the following steps :
1/ create a new geometry (cylinder)
2/create a new material and property ( plate property)
3/ MESH > MESH CONTROL > ATTRIBUTES On SURFACE (selected parts)
No mesh being made. Do I miss any step ?
Thank's a lot
Another interesting meshing technique of the command "MESH > MESH CONTROL > ATTRIBUTES ON SURFACE" is to activate the MAP SUBDIVISIONS instead the QUAD-EDGE LAYERS, as in general improves the mesh:
Next step is to prescribe the ELEMENT SIZE in the geometry using command "MESH > MESH CONTROL > SIZE ON SURFACE > SELECT ALL". The "trick" here is to press keys "Ctrl" + "M" simultaneously in the field "Element Size", this will ask you to select any CURVE of the model and the command will compute its length and the value will be written in the box Element Size. Then if you want to have the curve, for instance, divided in 14 divisions, simply divide the above value by "/14" and FEMAP will perform the mathematical operation:
Next Step is to MESH effectively the geometry using command "MESH > GEOMETRY > SURFACE> Select All":
And as a result the following mesh will appear in the screen:
If for any reason the meshing failed, take a look to the MESSAGE WINDOW for any error. If not any error exist but the mesh do not appear in the screen, simply make sure the meshing elements are visible pressing keys "Ctrl" + "Q" simultaneously and then click in "ALL ON", this is main visibility command of FEMAP:
Also, as the last resort, in FEMAP you can click the button "RESET ALL VISIBILITY OPTIONS", this will make ALL visible, not matter if located in hidden layers, etc..