|
Well, I ask because 4mm is the standard thickness for Coroplast at local sign shops, but that seems too thin to be stiff enough for an undertray supported by the car's cross members spaced ~2 feet apart.
According to engineering types, in a sandwich structure or I beam if the thickness between flanges is doubled, stiffness is increased 8 fold, so thicker Coro would be much stiffer, and stiffness is what we're after in undertray applications. Local stiffeners of wood dowel rods inserted into the flutes might work well, or carbon fiber arrow shafts if need be.
I also want to avoid aerodynamic flutter.
So, for those who've successfully used Coro for undertrays, what thickness did you use?
|