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Inter-board anti-impact protection structure based on negative poisson ratio effect and application thereof

A technology of negative Poisson's ratio and protective structure is applied in the field of side impact protection structure, which can solve the problems of poor protection performance of side protection structure, and achieve the effect of increasing density and improving the ability to resist damage.

Inactive Publication Date: 2021-04-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of sideboard anti-shock protection structure based on negative Poisson's ratio effect and its application, which is used to solve the problem of poor protection performance of sideside protection structure in the prior art

Method used

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  • Inter-board anti-impact protection structure based on negative poisson ratio effect and application thereof
  • Inter-board anti-impact protection structure based on negative poisson ratio effect and application thereof
  • Inter-board anti-impact protection structure based on negative poisson ratio effect and application thereof

Examples

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Embodiment 1

[0029] see figure 2 and image 3 , figure 2 It is a schematic structural diagram of a chiral negative Poisson's ratio cell in Example 1 of the present invention, image 3 is the compression deformation diagram of the chiral negative Poisson's ratio cell in Example 1 of the present invention, wherein figure 2 a is the cell map, figure 2 b is the corresponding parameter relationship diagram. In this embodiment, in each chiral negative Poisson's ratio cell, each nodal ring is evenly connected to six ligaments, and each ligament is located at the tangent of the nodal ring, and the center of a certain nodal ring is connected to two adjacent nodal rings The included angles of the connecting lines between the centers are all 60 degrees, forming a chiral negative Poisson's ratio cell in the form of six ligaments. according to figure 2 a Set forth the quantitative relationship of the chiral negative Poisson's ratio cell in Example 1, figure 2 In a, l, R, r, θ, They are t...

Embodiment 2

[0031] see Figure 4 , Figure 4 It is a schematic structural diagram of a chiral negative Poisson's ratio cell in Example 2 of the present invention. In this embodiment, in each chiral negative Poisson's ratio cell, each node ring is evenly connected to four ligaments, and each ligament is located at the tangent of the node ring, and the center of a node ring is connected to two adjacent node rings. The included angles of the connecting lines between the centers are all 90 degrees, forming a chiral negative Poisson's ratio cell in the form of four ligaments.

Embodiment 3

[0033] see Figure 5 , Figure 5 It is a schematic diagram of the structure of the chiral negative Poisson's ratio cell in Example 3 of the present invention. In this embodiment, in each chiral negative Poisson's ratio cell, each nodal ring is evenly connected to three ligaments, and each ligament is located at the tangent of the nodal ring, and the center of a certain nodal ring is connected to two adjacent nodal rings. The included angles of the connecting lines between the centers are all 120 degrees, forming a chiral negative Poisson's ratio cell in the form of a triligament.

[0034] For the chiral negative Poisson's ratio cell in the form of three ligaments, four ligaments or six ligaments described in the above-mentioned embodiments 1 to 3, a larger deformation can be achieved, and the Poisson's ratio in each direction is -1, so that each The amount of change in direction is the same. Taking the six ligaments as an example, when the chiral structure of the six ligament...

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Abstract

The invention discloses an inter-board anti-impact protection structure based on a negative Poisson's ratio effect. The structure comprises an outer plate, a sandwich layer and an inner plate, the outer plate and the inner plate are oppositely arranged, and the outer plate and the inner plate are bonded through the sandwich layer; the sandwich layer comprises a plurality of chiral negative Poisson's ratio cells arranged in an array and a buffer filler, and gaps of the chiral negative Poisson's ratio structure are filled with the buffer filler; each chiral negative Poisson's ratio cell is composed of a plurality of node rings, a plurality of ligaments and rigid metal fillers, each node ring is connected with at least three ligaments, and the node rings are filled with the rigid metal fillers. The chiral negative Poisson's ratio cell arranged in an array mode are introduced into the sandwich layer and filled with low-density buffer filler, compression is borne in the impact direction when an impact load is borne, compression is also generated on the side face, materials can flow to the position nearby an impact part, and therefore the local density of the structure is increased, and the damage resistance is obviously improved.

Description

technical field [0001] The invention relates to the field of anti-shock research of ship structures, in particular to a side-board anti-shock protection structure based on negative Poisson's ratio effect and its application. Background technique [0002] At present, with the exploration and exploitation of marine resources, the issue of marine territory has become increasingly prominent. Large ships are one of the backbone forces to protect my country's maritime territory. In addition, the threat of advanced anti-ship weapons such as supercavitating torpedoes and smart mines to large ships is becoming more and more serious. Anti-shock performance, doing a good job in the protection of large ships and ensuring their continuous operations are the focus of current maritime military development. [0003] When large ships are attacked by torpedoes and anti-ship missiles, they will be affected by armor-piercing effects, explosion fragment effects, and explosion shock wave effects....

Claims

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Application Information

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IPC IPC(8): B63B59/00F16F15/08F16F15/02
CPCB63B59/00F16F15/02F16F15/08
Inventor 王献忠李宁夏瑀陈立
Owner WUHAN UNIV OF TECH