good answer!
I will calculate shear force!
my target is like I wrote, I would like to bond alluminium and metal
with high mechanical resistance join; the dimension of pieces a
-aluminium about 15 mm large per 2 mm hickness
-steel or iron 8mm large per 0,5 thickness
glued surface is about 8 mm per 15 mm

Peeling force should be greater than several kilos;
I have no space for mechanical join I would like to avoid rivets or
something similar.

Thank you!