Originally Posted by Auto_Infantry

I agree, carbon fiber is very strong when stretching and bending, but weak when compressed or exposed to high shock.

But, take for example a CF strut bar or wing, it won't bend or flex easily, but when hit with something at high speed or if something heavy dropped on it, it will crack. The high shock or impact will crack carbon fiber, not necessarily break it, but cause structural failure in which the carbon will be able to be bent or stretched more so then when not cracked.The crack will only get bigger and spider if more flexing and bending are applied to the piece. Once Carbon fiber is cracked, typically it is rendered useless. Even when repaired, it will never be the same strength as it was before.