Vehicle compound rear bumper based on negative poisson ratio structure

Abstract

The invention discloses a vehicle compound rear bumper based on a negative poisson ratio structure. The vehicle compound rear bumper includes a rear anti-collision beam, a front anti-collision beam and an energy absorbing inner core. The front anti-collision beam and the rear anti-collision beam are connected in a matched mode to form a shell body containing the energy absorbing inner core. A compound energy absorbing inner core is obtained by a plurality of composite cell arrays with identical structures, and each of the composite cells comprises a negative poisson ratio single cell structureand a regular hexagon honeycomb structure. The rear anti-collision beam and the front anti-collision beam form a shell body with a radian through welding, and the compound energy absorbing inner coreis installed in the shell body. The vehicle compound rear bumper has good energy absorption performance duringuse, and when the vehicle is tailgated and collided, the collision energy can be effectively absorbed, the damage to an occupant from the tailgating and collision can be reduced, and the passive safety performance of the vehicle can be improved through the own stable deformation of the vehicle compound rear bumper.

Description

technical field [0001] The invention relates to the field of automobile passive safety protection, in particular to an automobile composite rear bumper based on a negative Poisson's ratio structure. Background technique [0002] With the rapid development of the automobile industry, the number of automobiles has increased rapidly, and the number of traffic accidents in daily life has also continued to rise. Many lives are taken away by traffic accidents every year. According to statistics, in traffic accidents, automobiles are occupied by rear-end collisions, and the rear bumper of automobiles plays an important role in the passive safety performance of vehicles during rear-end collisions. [0003] At present, the common car rear bumper is mostly a hollow shell composed of two sheet metal parts. Its structure is relatively simple and its function is relatively simple. When the car is hit by a rear-end collision, it cannot play the role of absorbing the collision energy and m...

AI Technical Summary

Problems solved by technology

[0003] At present, the common car rear bumper is mostly a hollow shell composed of two sheet metal parts. Its structure is relatively simple and its function is relatively simple. When the car is hit by a rear-end collision, it cannot play the role of absorbing the collision energy and mitigating the impact of the collision. , causing occupants to be easily seriously injured in a collision

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