Multi-level energy absorbing tube

Abstract

The invention discloses a multi-level energy absorbing tube, which is composed of at least two layers of pipe walls by splicing, wherein the energy absorbing tube comprises a first-level hollow pipe surrounded by inner pipe walls and a number of second-level hollow pipes formed by two adjacent layers of pipe walls by splicing, and the second-level hollow pipes are arranged around the first-level hollow pipe. In particular, the energy absorbing tube is provided with the cross section of a spliced shape of n sinusoidal corrugations, a specific structure is that the trough of the outer sinusoidalcorrugations in every two sinusoidal corrugations spliced on the cross section of the energy absorbing tube is tangent to the peak of the inner sinusoidal corrugations, and the other structure is a double-layer energy absorbing tube, having the peaks and troughs of the two sinusoidal waves spliced on the cross section directly opposite. The improved structure of the energy absorbing tube makes the interaction between the inner and outer layer tubes stable during the deformation process, improves the deformation, and enhances the energy absorption effect.

Description

Technical field [0001] The invention belongs to the technical field of automobile collisions, and specifically relates to a multi-level energy absorbing tube. Background technique [0002] Thin-walled structures are widely used due to their low cost and high energy absorption characteristics. Among them, the thin-walled round tube is one of the most widely used energy absorbing structures. When the traditional round tube is subjected to an axial impact load, it often exhibits a higher initial peak force and a larger force fluctuation range. Under the action of a larger initial peak force, a larger acceleration will be produced during the impact, which will increase the damage to the occupants. Many researchers have reduced the initial peak force by introducing corrugations in the axial direction, but at the same time it will also reduce the specific energy absorption SEA of the structure and weaken the energy absorption effect of the structure. [0003] Xiaolin Deng et al. propo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of unstable deformation mode in the single-layer transverse sinusoidal corrugated pipe energy-absorbing structure, and to provide a multi-level energy-absorbing pipe, which plays a stabilizing role through the interaction of the inner and outer layer pipes during the deformation process. Improved deformation and better energy absorption compared to single-layer structures

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