origami folding crease

[carmela.trimarco]

Hello to all,
I'm working on the fe modeling of an origami structure. This is an origami kreasling that I attach here the photo.
I'm finding problems with the hinge setting in the folding line. I have already tried different techniques : coinciding builder, connector builder, hinge with different stiffness but I am having problems in post buckling and I can not get to the completely closed structure (fully tabletsd). I attach photos of my model and an example of fully compacted to show how it should behave.
p.s. my model have a 4-sided polygon top and bottom surfaces while the other one is a 7-sided.

 

[meccanicamg]

with less Englishmen and more land on the ground maybe expand the audience that can help you.
You didn't sell the software you're using, so there you had to write.
It seems to me a deformation analysis, but if the deformation is high it is not enough a normal fem with the "big shifts" options. Maybe with a program like deform you can do something.