modellazione shell

[elmatador83]

hello to all and excuse any errors but are new dl forum. I use hypermesh with user's profile abaqus, I have to model a sandwich structure, imposed as core solid elements, while for skins I have to set shell elements, the problem is that I should develop the thickness from the midsurface to rise and not half over the midsurface and 1/2 below.The question is how do I set this in the program?? ? ?
Thank you.
savior

 

[Onda]

Why do you use three elements instead of a simple shell element on the midsurface? with a layer with core properties and how many do you need for the properties of the two skins?
Anyway to do what you want to do, you have to skin the two faces of solids with shell elements. I can't tell you how to do it in hypermesh as I haven't used it for a long time.
I think it's banal, just create a mesh on mesh by making a mesh shell on solid elements.
verify to have the normal headings inside.
with this system, the thickness of the core is slightly higher than the thickness of the two skins, but in the case of skins of low thickness than the core is accepted.

 

[acatra83]

Hi.
by default the thickness goes 1/2 towards the outside and 1/2 towards the inside.. .
However, you can set the offset parameter in the prop card.

offset=spos --> the thickness goes on the positive side of the normal.
offset=sneg --> the thickness goes from the negative side of the normal.

attention to normal, they must all be consistent.

Hi.