Carbon-fiber-reinforced metal laminated square pipe and preparation method thereof

The invention provides a carbon-fiber-reinforced metal laminated thin-wall energy absorbing square pipe with high compressing force efficiency, high energy absorption efficiency and designable carbonfiber content and distribution state and a preparation method of the square pipe. The preparation method comprises specific steps as follows: step 1, a metal thin-wall square pipe is cut according tofinished size, and the bonding surface of the metal square pipe is cleaned, polished and subjected to anticorrosion treatment; step 2, according to a prediction method of folding deformation of the metal thin-wall square pipe, wavelength of the folding deformation of a metal material is predicted according to section side length and wall thickness of the thin-wall square pipe; step 3, a carbon fiber prepreg is cut according to double of the predicted wavelength of the folding deformation of the metal material; step 4, according to the carbon fiber distribution requirement of a required finished product, the cut carbon