Well If I start with a circle give it a radius pad it. set the diameter set the pad run fem on it as a 3d object I get a error .0: We are going to start ... 0.1: Start Gmsh ... 2.7: Gmsh had warnings ... 2.7: Error : Self intersecting surface mesh, computing intersections (this could take a while) E...

I tired making a circle and extruding it setting its material and forces I get a error ..

That is very interesting! I got it to make the solution mesh and colored it with abs displacement and displacement checkbox and slider. So it seems to have a shell is made of some material it says aluminum looking at its features we might be able to do it with calculix steel. The fem constraint disp...

If I have to make the shape out of cubes I will but has anyone used cilanders in freecad fem?
Also has anyone gotten the shell part of fem to work to see how my tube frame would be effected by forces.

Mine did not convert but I have 17 you may have 18 and yours has the fields displayed differently.
I would like to know how and why other people added other materials and how they saved it in here.

Wouldn't that be incorrect because it had e-6 at the end so move the decimal point 6 places to the left.?

When I put in 0.0000012146 under kg/mm3 the numbers blank out to 0.00 Is it too large of a number? THe material I make doen't seem to want to hold the values and I can't go back to check after I select ok for the material except make a new one.??? I tried that material to analyse a tube and I get a ...

kg/m^2 /2000 to get mm
0.486 kg/mm^3

msi to psi 34 msi 34000000psi

0.2 position ratio

So far what I have in freecad for .5 in carbon fiber tubes
486 kg/mm^3

Young Modulus (GPa) (it's a Elasticity modulus on the datasheet, just convert the msi to GPa)

msi -> psi is what I think freecad would want?
GPA is a unit but freecad fem module says psi?
34000000 psi

This is what I got with the calculation