A thin-walled conical energy absorbing box imitating a yak horn structure

Abstract

A thin- walled conical energy absorbing box imitating a yak horn structure is composed of bionic ribbed pipe, bionic inner pipe, inner and out layer foamed aluminum layered pipe, outer layer foamed aluminum, inner layer foamed aluminum and connecting rib. Bionic ribbed tube is designed based on the yak horn shell surface protruding along the length direction, and the cross-sectional size graduallybecomes larger from top to bottom, which has a good energy dissipation effect step by step. Bionic inner tube, outer aluminum foam, inner aluminum foam and inner aluminum foam separator are combinedto form a foam aluminum filled biomimetic core. The foam aluminum filled core is divided into high density aluminum foam and low density aluminum foam, which is designed to simulate the variation of yak horn density along the radial gradient. The invention applies the gradient intensity, the gradient density and the surface morphology characteristics in the horn structure to the design of the thin-wall energy absorbing box, greatly improves the bearing capacity and the energy absorbing characteristic of the energy absorbing device in the collision process, and simultaneously achieves the purpose of lightweight.

Description

technical field [0001] The invention belongs to the field of crashworthiness design of automobile body structures, and relates to a bionic energy-absorbing device with the structural characteristics of yak horns. The component is mainly used in collision energy dissipation systems of automobiles, ships and other vehicles. Background technique [0002] As a low-cost, high-performance energy-absorbing element, metal thin-walled tubes are widely used in the design of energy-absorbing devices for vehicles such as automobiles and ships. Under the action of external load, the thin-walled tube can absorb and dissipate a large amount of impact energy generated during a collision by relying on its own structural buckling, fracture and other failure forms, so as to effectively protect the lives of passengers and the safety of valuables. The energy absorption characteristics and deformation modes of thin-walled pipes are closely related not only to their material, length, wall thicknes...

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Problems solved by technology

At present, there are relatively few applications of bion

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