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Protective helmet with negative Poisson's ratio effect liner and design method thereof

A negative Poisson's ratio, liner technology, applied in the field of new materials and new structures, can solve problems such as poor production and manufacturing, and achieve the effect of reducing weight, meeting the needs of daily use, and good impact resistance requirements

Pending Publication Date: 2019-07-05
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its mostly complex microporous structure, the traditional manufacturing process cannot produce the designed structure well.

Method used

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  • Protective helmet with negative Poisson's ratio effect liner and design method thereof
  • Protective helmet with negative Poisson's ratio effect liner and design method thereof
  • Protective helmet with negative Poisson's ratio effect liner and design method thereof

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Embodiment Construction

[0035] Below in conjunction with specific embodiment and accompanying drawing, the present invention will be further described:

[0036] Figure 1 and figure 2 As shown, a protective helmet with a negative Poisson's ratio effect liner includes a shell 1, a goggle 2, a cushioning layer 3, and a liner 4;

[0037] The key technology of the protective helmet is a liner with a negative Poisson's ratio effect, including a hard liner and a semi-hard liner;

[0038] The negative Poisson's ratio effect of the helmet liner comes from the periodic microstructure designed by finite element analysis. The helmet liner is composed of hard liner and semi-hard liner, and different grades of Nylon material for 3D printing;

[0039] The weight m of the helmet liner and the total mass M of the helmet satisfy: 80g<m<100g, 0.078<m / M<0.098.

[0040]The helmet is sprayed and pasted with reflective material at appropriate positions on the front, rear, left, and right sides, and the area S of the re...

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Abstract

The invention discloses a protective helmet with a negative Poisson's ratio effect liner and a design method thereof. The key of the protective helmet with the negative Poisson's ratio effect liner isthat the liner part is matched with a shell, a buffer layer and a pair of protective glasses. The designed protective helmet can be customized and has better protective performance. The method comprises the steps of firstly determining the head type of a user and the type of a selected helmet, determining the size of each component, and then combining the designed periodic microstructure with 3Dprinting for preparation according to different use requirements of the hard liner and the semi-hard liner; and finally, all the components are mutually combined for preparation, and the use requirements are met. The manufactured helmet is lighter and thinner while reducing weight, the helmet can be customized according to personal head type differences, wearing is more comfortable, and the requirements for protection, functions and comfort are met.

Description

technical field [0001] The invention relates to a helmet with a negative Poisson's ratio effect by designing a liner with a negative Poisson's ratio, and proposes a design method for a protective helmet with a liner with a negative Poisson's ratio effect, which belongs to the field of new materials and new structures. Background technique [0002] A helmet is a protective gear used to protect the head. It is a hat worn by soldiers during training and combat, and an indispensable tool in people's transportation and sports. The most serious injury is the head, because the head is in the highest and most protruding position, causing the head to hit the ground or hit vehicles and other objects first, and the head often cannot withstand the huge force when an accident occurs. Studies have shown that the use of helmets can greatly reduce mortality and minimize human injuries. A helmet generally includes a shell, a cushioning layer, a pad, and goggles. The liner material has the...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 任鑫王仕龙韩传镇沈炜姜智博周三峰罗钰茗袁建成邓洪永王鑫源钱程苟若雅史雨桐韦文俊
Owner NANJING UNIV OF TECH
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