Bottom protection structure containing negative-Poisson-ratio honeycomb material

Abstract

The invention belongs to the field of vehicle bottom protection, and particularly relates to a bottom protection structure containing a negative-Poisson-ratio honeycomb material. The bottom protectionstructure comprises a basic protective assembly and a protective assembly sandwich layer, wherein the basic protection assembly comprises an upper plate, a bottom plate and a fixing structure used for fixing the protection assembly sandwich layer; the protection assembly sandwich layer comprises the negative-Poisson-ratio honeycomb material, an upper panel arranged on the negative-Poisson-ratio honeycomb material and a lower panel arranged below the negative-Poisson-ratio honeycomb material; and the protection assembly sandwich layer is fixed by the upper panel and the lower panel through thefixing structure for fixing the protection assembly sandwich layer. According to the protection structure, the bottom plate is designed to be of a trapezoidal structure, and the negative-Poisson-ratio honeycomb material is installed between the upper plate and the bottom plate to serve as a main energy absorption structure, so impact energy generated by explosion can be effectively absorbed; andthe negative-Poisson-ratio honeycomb material and a sandwich lightning protection assembly are combined with each other, so the energy absorption effect of the lightning protection assembly is greatlyimproved, and the safety of passengers is better guaranteed.

Description

technical field [0001] The invention belongs to the field of vehicle bottom protection, in particular to a bottom protection structure containing negative Poisson's ratio honeycomb material. Background technique [0002] As an important strategic weapon in the battlefield, military vehicles have the ability to turn the tide of battle. In recent years, military vehicles have often encountered the threat of improvised explosive devices (IEDs). How to ensure the survivability of military vehicles and their occupants in explosive environments is an urgent problem to be solved. . When special vehicles face threats such as landmines and improvised explosive devices, the protection performance of the vehicle bottom will directly affect the safety of the occupants in the vehicle. The "sandwich" lightning protection component is an effective anti-explosion impact structure, which consists of two flat plates and a sandwich layer in the middle. The front panel can distribute the blas...

AI Technical Summary

Problems solved by technology

However, during the process of absorbing energy, the material will expand perpendicular to the direction of external force. In the event of a large equivalent explosion, the expansion of the energy-absorbing material in the direction perpendicular to the external force will inevitably have an adverse effect on the protective components or the body structure.

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