Anti-collision device combining chiral negative Poisson's ratio structure and honeycomb structure

A technology of anti-collision device and negative Poisson's ratio, which is applied in road safety devices, earthquake resistance, building components, etc., can solve the problems of rigid "skin failure, loss of functionality, and violation of the concept of structural optimization, etc., to achieve protection safety, Good energy absorption and reusable effect

Active Publication Date: 2021-06-15
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the impact load is large enough, the "rigid" skin will fail prematurely and lose its functionality, and the too thick skin violates the structural optimization concept of "light energy absorption"

Method used

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  • Anti-collision device combining chiral negative Poisson's ratio structure and honeycomb structure
  • Anti-collision device combining chiral negative Poisson's ratio structure and honeycomb structure
  • Anti-collision device combining chiral negative Poisson's ratio structure and honeycomb structure

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Effect test

Embodiment 1

[0029] The anti-collision device combined chiral negative Poisson's ratio structure and honeycomb structure described in the present invention is a multi-layer composite structure, which is mainly used for the protection of key components of engineering structures, such as anti-ice and ship impact of offshore platform structures, Anti-ship and vehicle collision protection for bridge piers and highway guardrails, and more common geotechnical protection structures, vehicle armor, explosion-proof blankets and smart wearables also have good results.

[0030] Such as figure 1 As shown, the anti-collision device combined chiral negative Poisson's ratio structure and honeycomb structure according to the present invention is placed on the outer surface of the key structure to be protected, and includes five layers from inside to outside, which are: rigid inner cushion 1. Chiral negative Poisson's ratio layer 2, rigid middle cushion layer 3, honeycomb layer 4 and rigid skin 5. Among t...

Embodiment 2

[0038] Such as Figure 5 As shown, the honeycomb layer 4 adopts an assembled structure. The honeycomb structure is arranged along its out-of-plane direction to resist external impact loads, and is bonded together with the rigid middle cushion 3 and the outermost rigid skin 5 by adhesive. In order to avoid its "saddle effect" under large curvature molding and achieve its goal of easy installation and replacement, it is assembled in a modular way. A wedge-shaped groove is reserved in advance on the rigid middle cushion layer 3, and then the honeycomb layer 4 of wedge-shaped structure is placed. The honeycomb layers 4 in adjacent wedge-shaped grooves are closely connected to form a ring structure.

[0039] It should be noted that if the negative Poisson’s ratio layer is simply used as the energy-absorbing layer of the impact protection device, due to its relatively low stiffness, the impact load is large enough to cause premature failure of the “rigid” skin and lose its functio...

Embodiment 3

[0042]The anti-collision device combined chiral negative Poisson's ratio structure and honeycomb structure of the present invention has various structures.

[0043] The anti-collision device can be made into a ring shape, a concave shape, or even a cone shape. The anti-collision device is made into a ring shape, which can be used to protect the collision between bridge piers and ocean platforms and ships, as well as the collision between roadside building columns and vehicles. The ring-shaped anti-collision device is also the most common structure, such as figure 1 shown. The anti-collision device is made into a concave or conical shape, such as figure 2 As shown, it mainly means that the outermost rigid skin 5 can be made into a concave shape or a conical shape, which can be used for anti-icing of marine engineering structures and to prevent the anti-collision device from sliding up and down during a collision.

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Abstract

The invention relates to an anti-collision device combined with a chiral negative Poisson's ratio structure and a honeycomb structure, belonging to the technical field of impact protection devices. The invention includes an anti-collision device. The anti-collision device is provided with a rigid inner cushion, a chiral negative Poisson's ratio layer, a rigid middle cushion, a honeycomb layer and a rigid skin from the inside to the outside. The chiral negative Poisson's ratio layer is along the plane The chiral negative Poisson's ratio structure arranged in the inner direction, the honeycomb layer is a honeycomb structure arranged in the out-of-plane direction, and the rigid inner cushion, rigid middle cushion and rigid skin are all fixedly connected with the adjacent layers, for high corrosion resistance The outer surface of the rigid skin of the environment can be sprayed with anti-corrosion materials. The invention fully utilizes the characteristics of light energy absorption of porous materials and the good impact resistance performance of the negative Poisson's ratio structure. Compared with traditional anti-collision devices, the invention has the advantages of light weight, good energy absorption, continuous impact resistance and easy repair. , can be widely used in the field of safety protection of land and marine building structures.

Description

technical field [0001] The invention relates to an anti-collision device combined with a chiral negative Poisson's ratio structure and a honeycomb structure, belonging to the technical field of impact protection devices. Background technique [0002] As a lightweight porous structure, the negative Poisson's ratio structure has the characteristics of lateral expansion or contraction when it is subjected to longitudinal tensile and compressive loads. This unconventional deformation mode makes it useful in the field of explosion resistance and impact resistance of building structures unique advantage. When a negative Poisson's ratio structure encounters impact loads (such as caused by vehicle or ship collisions and explosions), the increase in material density due to the "shrinkage" of materials near the impact area will greatly improve the impact resistance of the structure ( Compared with a single material of the same quality), the local depression of the structure caused by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/98E01F15/00E02B3/26
CPCE01F15/00E02B3/26E04B1/98Y02A30/30
Inventor 张春巍郜殿伟
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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