Direct-plug type energy absorption assembly of thin-walled tube

Abstract

The invention belongs to energy absorption accessories of thin-walled tubes in anti-collision structures of vehicles, and particularly relates to a direct-plug type energy absorption assembly of a thin-walled tube. The direct-plug type energy absorption assembly of the thin-walled tube comprises four energy absorption elements and fixing elements. Each energy absorption element is a multilayer composite round tube, and tube wall materials of adjacent layers of each multilayer composite round tube are mutually orthogonal. The two ends of each energy absorption element are fixed to the fixing elements, the other side of each fixing element is provided with a petal-shaped opening, and the energy absorption elements and the fixing elements are mounted in the thin-walled tube. Through the direct-plug type energy absorption assembly of the thin-walled tube, the bearing capacity and the specific energy absorption rate of unit mass of the thin-walled tube are increased, a load uniformity coefficient is reduced, local buckling and damage are reduced, and plastic deformation is evenly distributed on more sections. Meanwhile, the direct-plug type energy absorption assembly of the thin-walled tube is stable, reliable and capable of coping with normal loads of different portions and directions, and external shock kinetic energy can be irreversibly dissipated through plastic deformation in a stable damage mode and in an adjustable way.

Description

technical field [0001] The invention belongs to an energy-absorbing auxiliary part of a thin-walled pipe in a vehicle anti-collision structure, in particular to an energy-absorbing component of a straight plug-type thin-walled pipe. Background technique [0002] As a main anti-collision component, thin-walled pipe fittings are widely used in the fields of automobiles, aviation and ships. Under the action of normal impact load, thin-walled pipe fittings will produce a large degree and range of bending plastic deformation, so as to dissipate the impact kinetic energy. Commonly used thin-walled pipe fittings have round and square cross-sections. The specific energy absorption rate of the square tube is lower than that of the round tube, but it is easy to process and install. Both types of thin-walled pipe fittings have their own advantages and disadvantages in crashworthiness design. However, excessive plastic deformation will cause the flattening of the cross section, which...

AI Technical Summary

Problems solved by technology

However, excessive plastic deformation will cause the flattening of the cross section, which will gradually lose the bearing capacity of the pipe fittings and cause the structure to collapse.

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