Negative poisson ratio vehicle collision energy absorbing box

Abstract

The invention discloses a negative poisson ratio vehicle collision energy absorbing box. The negative poisson ratio vehicle collision energy absorbing box comprises a cylinder-shaped shell (5), a front end plate (4) fixedly connected to the front end of the cylinder-shaped shell (5) and a rear end plate (7) fixedly connected to the rear end of the cylinder-shaped shell (5), wherein a V-shaped negative poisson ratio thin-walled tube energy absorbing body (3) is arranged in a cavity formed by the cylinder-shaped shell (5), the front end plate (4) and the rear end plate (7); and the V-shaped negative poisson ratio thin-walled tube energy absorbing body (3) comprises at least one thin-walled tube cylinder (31), and the axes of the thin-walled tube cylinder (31) are parallel to the axis of thecylinder-shaped shell (5). The negative poisson ratio vehicle collision energy absorbing box is good in energy absorbing stability and high in energy absorbing efficiency.

Description

technical field [0001] The invention belongs to the technical field of automobile passive safety protection equipment, in particular to a negative Poisson's ratio automobile collision energy-absorbing box with good energy absorption stability and high energy absorption efficiency. Background technique [0002] The car crash energy absorbing box is placed at the front of the car. When the vehicle collides, the energy absorbing box can dissipate about 50% of the kinetic energy generated during the vehicle collision through crushing and deformation, thereby effectively protecting the safety of members and cargo. [0003] Negative Poisson's ratio structures exhibit a counterintuitive behavior when deformed. When compressed axially, the structure also shrinks longitudinally. It is this counterintuitive negative Poisson's ratio phenomenon that gives structures many desirable properties, including ratio The traditional structure has more excellent impact resistance and energy absor...

AI Technical Summary

Problems solved by technology

The structure of traditional automotive energy-absorbing boxes is still thin-walled square tubes, thin-walled round tubes, etc., but compared with thin-walled tubes with a negative Poisson’s ratio structure, the traditional thin-walled tubes are inferior in terms of crashworthiness and energy absorption characteristics.

[0004] Since the existing negative Poisson's ratio car crash energy absorbing boxes generally use thin-walled square tubes and thin-walled round tubes as internal support and deformation structures, the energy absorption is unstable and the energy absorption efficiency is low, which cannot play a good safety protection effect.

Images