Bimetal sheet deformation curve control due to temperature

[lakasa]

Hello,

I am studying the the deformation of aluminium sheet due to temperature which is fixed all four side.
The aluminium sheet is deforming towards the glass side, in order to deform to the other side i am putting a steel glued to the opposite side (Bimetal curve behaviour).
Will this work?
Temperature difference is 120 Degree
See the attached pic

 

[dik]

Do they have to be fixed at the edge, or, even bonded? Do they have to be dissimilar materials?

Dik

 

[lakasa]

they need to be bonded together with rivet fixing at the perimeter. I want to have different material to get the curve of deflection due to thermal.