Which constraints should I set to simulate stiffened panel under pure shear?
Which constraints should I set to simulate stiffened panel under pure shear?
(OP)
I have a stiffened panel that looks like this:

This panel is under shear:

All sides of the panel are pinned. Txy - is distributed shear load.
Which constraints should I set to simulate stiffened panel under pure shear?

This panel is under shear:

All sides of the panel are pinned. Txy - is distributed shear load.
Which constraints should I set to simulate stiffened panel under pure shear?
As for me I did this (but don't know is it good approach): Constraints: Tx Ty Tz Rx Ry Rz Left: - - x - - x Right: - - x - - x Top: - - x - - x Bottom: - - x - - x A: x x - - - - D: - x - - - - Where: Tx, Ty, Tz - translational degrees of freedom Rx, Ry, Rz - rotational degrees of freedom '-' denotes free degree of freedom 'x' denotes fixed degree of freedom A - left bottom node // B ---- C D - right bottom node // | | // A ---- D Then I set distributed load on each side in appropriate direction.So which kind of constraints would you advice?
RE: Which constraints should I set to simulate stiffened panel under pure shear?
If you are not sure about BCs, run a simple test analysis of a rectangular plate (without stiffeners) subjected to in-plane shear. Its results should show you whether the constraints are correct or not.
RE: Which constraints should I set to simulate stiffened panel under pure shear?
another day in paradise, or is paradise one day closer ?
RE: Which constraints should I set to simulate stiffened panel under pure shear?
RE: Which constraints should I set to simulate stiffened panel under pure shear?
another day in paradise, or is paradise one day closer ?
RE: Which constraints should I set to simulate stiffened panel under pure shear?
Start with an unstiffened plate model and work out loads and bc’s to get a state of pure shear stress. Then move to the stiffened panel.
And remesh with quad elements. If you are using 4 noded tet elements the results will be rubbish (at best).
RE: Which constraints should I set to simulate stiffened panel under pure shear?
https://www.structuralfea.com/PlateMesh/download.h...
Brian
www.espcomposites.com
RE: Which constraints should I set to simulate stiffened panel under pure shear?
I agree with the approach of starting with a simpler model and loading, and get that right (or "right") and adding complication.
One thing to think about is "what's beyond the model?" is it a rigid body or a theoretically infinite shear panel ? Possibly model as a cylinder if infinite ? Possibly model as "super-element" and combine 9 (16?, 25 ??) pieces together to see what happens.
For edges, maybe add a beam with very low area but very high I
yeah, avoid TET4s like they were some "red-haired orphan". But meshing this with TETs would take a lot of elements ! (but so what if it takes 5 minutes to run ...)
another day in paradise, or is paradise one day closer ?