comparison rigidity shell-solid

[G_P]

Good evening to all,
I have a doubt regarding the comparison between the results obtained from a simple static analysis elastic-linear of a plate, meshata first with square shell elements of the first order and then with solids of equal size...the structure, of which I can not provide images, is assimilable to a rectangular plate of size 100x50x3 framed on one of the short sides, and is subject to an essentially bending load.
at this point my doubt is as follows. . .
is it correct to expect that the meshata plate with shell elements perform a more rigid behavior than that meshata with solids?
I had done this idea as in itself shells have intrinsically both flexional and cutting stiffness while the solid, having only three degrees of translational freedom for knot, is less rigid to bending.
if what is suggested above is correct, is it therefore lawful to consider the behavior of the meshata structure with shell more "verosimile"?
Thank you who will help me escape this doubt

 

[Onda]

I would say that what is wrong is wrong.
It is true that the knots of solid elements are not associated with flexional rigidity. but there are at least two knots in the thickness, rigidity is given by the distance of these.
what changes using solid elements is the check of the cut in the thickness. speculating to use a brick element to 8 knots to model a plate (a set of elements), but with only one element in the thickness, the knots at the top, are not able to capture the correct trend of the cut. This effect is called shear locking and appears in tetraedic solid elements to 4 knots and brick to 8 knots (so without the mid side knots)
at this link you find a better explanation than I can do:https://www.quora.com/what-is-shear-locking-in-fea

 

[G_P]

hello wave,
Thank you for your explanation. It's clearer.
soon