profilo sandwich simulation

[Dmaz]

Hello everyone!
I have to simulate the behavior of a wind blade, the profile 3d is an extruded dwarf, the material used is a sandwich made of fiberglass skins with a thickness of a couple of millimeters and foam interior.
not being able to use a single shell element given the non-flat shape of the profile, I thought to use the shell 91 with offset inside for the skins, so as to simulate the behavior of an orthotropic material and solid186 to simulate the isotropic material inside.
What do you say? Are there any other ways to simulate a sandwich?
Thank you.
dmaz

 

[stefano.garbin]

I think it's okay with your idea.
eye to make the offset out of the skins according to me, and not inside, even if it is foam from the structural point of view does not change so much.

 

[Dmaz]

thanks you always have an answer for every doubt!
Should the offset give it inside epr imported geometry issues, say it is a problem because of the volumes that intersect?

 

[stefano.garbin]

no problem the offset gives it where you best believe, top, middle or bottom is the same.

 

[Dmaz]

I got a doubt about the mating made using the elements I told you.. the results seem to me to be consistent but the solid has 3 degrees of freedom while the shell has 6 as they also include rotations. Could it be a problem?
I found this item money-shell (http://www.kxcad.net/ansys/ansys/ansyshelp/hlp_e_solsh190.html) In case of seconds, could I use it instead of shelll91?

 

[stefano.garbin]

eye that solsh190 is used only for mesh of "slim" volumes with the sweep (vsweep).
In practice you find a solid element in which the normal z is orthogonally oriented to the starting surface for the sweep.
in my opinion it becomes very difficult to make a mesh in this case!
for the absence of rotation in solids no problem.

 

[Dmaz]

thanks for the clarification, then I continue with the shell91!