OK, I apologize for the title, but I don't know the correct engineering term.
It relates to the following everyday experience - take a can of highly carbonated soda whose walls are presumably under considerable pressure and pull the ring. The can's structure fails exactly where it is intended to, and we pour our fizzy drink.
Fine.
Now some years ago there was a road bridge in some Western US state (I can't remember which) where high winds induced harmonic oscillations which caused the bridge to fail, with loss of life. I read that the same thinking that goes into the construction of a ring-pull Coke can is now used in bridge construction to prevent such an event in the future.
I was given very little further detail, so I don't really understand this. Not being an engineer I should be amused to have this explained to me by a Mech Eng jock