Rectangular grid in a dome loaded with static pressure

[Bob19]

Hi all,

I have to substantiate a thin dome which contains a perforated grid in the middle of the dome. The grid has a rectangular contour and covers around 50% of the dome area.
The dome and the grid are loaded with a static pressure.

I would like to have some advice about the stress field in the grid:
- do you think the grid will be subjected to membrane stresses only (the rectangular grid is "projected" on the dome shape)?
- or do you think that bending stresses can occur in the transition area grid/rest of the dome, because the perforated grid is more flexible that the periphery?

Thanks very much for your help

 

[jte]

Bob-

I'm having a hard time understanding your geometry. A sketch would help out a lot and probably get you some more replies.

jt

 

[Bob19]

Hi Jt,

thanks for your answer.
Actually, I just run an FE model with a very flexible shell to represent the rectangular "cut out" (ie perforated grid) in the dome.
It appears that the dome protects the grid periphery from significant bending. Seems then OK.