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Energy absorption box based on inner core with concave polyhedron negative Poisson's ratio three-dimensional structure

A negative Poisson's ratio, three-dimensional structure technology, applied in the field of energy-absorbing boxes, can solve the problems of insufficient deformation stability, uncontrollable pedestrian injury, insufficient compression, etc., to achieve improved energy absorption effect, good pedestrian protection performance, and maintenance cost saving Effect

Active Publication Date: 2019-06-14
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of energy-absorbing box filled with fiber-reinforced composite materials has problems such as insufficient deformation stability, insufficient compression, and uncontrollable damage to pedestrians in the event of a car collision.

Method used

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  • Energy absorption box based on inner core with concave polyhedron negative Poisson's ratio three-dimensional structure
  • Energy absorption box based on inner core with concave polyhedron negative Poisson's ratio three-dimensional structure
  • Energy absorption box based on inner core with concave polyhedron negative Poisson's ratio three-dimensional structure

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Embodiment 1

[0024] combine figure 1 and figure 2 , an energy-absorbing box based on a concave polyhedral negative Poisson's ratio three-dimensional inner core, including a front mounting plate 1, a rear mounting plate 2, an energy-absorbing box body 3 and a concave polyhedron negative Poisson filled in the inner cavity of the box than the three-dimensional structure inner core4. The energy-absorbing box body 3 is formed by cold stamping of a high-strength alloy steel plate with a thickness of 1.2 mm. At the same time, it is welded by spot welding technology to form a closed thin-walled box structure with a rectangular cross-section. The length of the box body is 160 mm, and the width and height of the section are respectively 280mm and 280mm. The box body 3 of the energy-absorbing box is provided with two concave crush grooves 301 at the trisector of the axial length. The crush grooves 301 run along the surface of the box body 3. The width of the two crush grooves 301 is the same as 6m...

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Abstract

The invention discloses an energy absorption box based on an inner core with a concave polyhedron negative Poisson's ratio three-dimensional structure. The energy absorption box includes a front mounting plate fixedly connected to an automobile anti-collision beam, a rear mounting plate fixedly connected to an automobile longitudinal beam, an energy absorption box body and the inner core with theconcave polyhedron negative Poisson's ratio three-dimensional structure filling the cavity of the box body. The inner core is form by multiple concave polyhedron negative Poisson's ratio unit cell structures arranged in a three-dimensional array. The energy absorption box of the invention has a negative Poisson's ratio and a stiffness enhancement characteristic in a direction of impact by combining the negative Poisson's ratio three-dimensional structure, and so the energy absorption box can improve the energy absorbing effect under a plurality of working conditions and improve the collision safety performance of vehicles.

Description

technical field [0001] The invention relates to the field of crashworthiness design of automobile structures, in particular to an energy-absorbing box based on a three-dimensional structure inner core of a concave polyhedron with negative Poisson's ratio. Background technique [0002] The front bumper system of a car is the most important part of the passive safety design of a car. Its purpose is to achieve the following functions in the event of a frontal collision: When a car-person accident occurs, the system should minimize the impact force to eliminate the impact on the legs of pedestrians. And knee injuries; in the event of a car-car or car-thing accident, the system can control the deformation of the parts as much as possible in a smaller area to protect the remaining important parts and reduce follow-up maintenance costs. The energy-absorbing box is an important energy-absorbing part of the car's front bumper system, which is located between the bumper beam and the c...

Claims

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Application Information

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IPC IPC(8): B60R19/34
Inventor 王陶陆嘉伟王良模陈刚
Owner NANJING UNIV OF SCI & TECH
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