quote: The crumple/crush properties of, say, an aluminum/carbon fiber chassis and bodywork compared to a steel frame and bodywork means that you, the occupant, are going to have a lot more velocity left when you personally finally hit something. Aluminum and carbon aren't simply lighter versions of steel, otherwise having the same properties...neither one has the same characteristics of ductility and such that are key in a crash. Aluminum will just fold and crack, and carbon fiber's just going to shatter. You're imagining them as steel without the weight...and that's not how it works
quote: Carbon fiber's failure properties can also be used as an energy absorption method when properly engineered.