Originally Posted by
Scrooge McDuck
That is pretty wired. AFAIK, all parts of the wings are designed to sustain a severe amount of sudden stress to ensure that during heavy weather and conditions nothing breaks.
I think the parts found are from the winglets. These are not structural. Their job is to reduce drag by reducing the amount of high-pressure air from under the wing spills over the wing-tip to the low-pressure air on top of the wing. They are designed to break away relatively easily so that minor ground collisions don't cause series damage to the wing.