Gradient composite impacting energy absorption pipe fitting

Abstract

The invention discloses a gradient composite impacting energy absorption pipe fitting. The pipe fitting comprises a gradient inner pipe, a gradient outer pipe, an aluminum foam filling layer and a fiber reinforced cloth filling layer; the gradient inner pipe is sleeved with the gradient outer pipe, the gradient inner pipe is filled with the aluminum foam filling layer, and the portion between the gradient inner pipe and the gradient outer pipe is filled with fiber reinforced cloth. The gradient composite impacting energy absorption pipe fitting has the following advantages that the energy absorption efficiency can be improved in the modes of axial crumple, radial extrusion, expansion energy absorption, tearing energy absorption and the like, when the pipe fitting is applied to an automobile, when collision occurs, the life safety and property safety of automobile occupants can be protected to the maximum extent.

Description

technical field [0001] The invention belongs to a collision energy-absorbing device, in particular to a gradient composite collision energy-absorbing pipe. Background technique [0002] Collision energy-absorbing devices can play an important role in protecting personal life and property safety. For example, the passive safety structure of automobiles in collision energy-absorbing devices will be described below by taking the passive safety structure of automobiles as an example. It is the safety protection measure that is most directly related to the life and property safety of the occupants in vehicle collision accidents. A good passive safety structure should have efficient energy absorption characteristics, and reduce the occupants' impact from the collision source in the most stable energy dissipation mode. impact force, protect the safety of the occupants, and minimize the degree of injury of the personnel in the accident. Therefore, the energy-absorbing structure des...

AI Technical Summary

Problems solved by technology

First of all, when ordinary thin-walled pipes collide, they mainly adopt the traditional compression deformation energy absorption method. This type of energy-absorbing element only produces severe plastic deformation at the shrinkage to absorb the kinetic energy from the collision source, and the deformation mode is relatively simple. It will lead to insufficient energy absorption of the energy-absorbing structure, and the material utilization rate is not high

Secondly, ordinary thin-walled pipe fittings are difficult to adapt to the multi-angle oblique collision conditions of automobiles. The collision source and the automobile are prone to instability under the multi-angle oblique impact conditions, and the energy absorption efficiency decreases significantly with the increase of the impact angle. The limitations of pipe fittings are becoming more and more apparent

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