Boxing glove with negative Poisson's ratio effect and design method thereof

A negative Poisson's ratio and design method technology, applied in applications, household appliances, and other household appliances, can solve the problems that negative Poisson's ratio effects are not generally observed, and achieve strong novelty and practicability, reduce damage, The effect of strong rebound toughness

Pending Publication Date: 2019-05-31
NANJING UNIV OF TECH
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Problems solved by technology

This phenomenon is thermodynamically possible, but the negativ

Method used

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  • Boxing glove with negative Poisson's ratio effect and design method thereof

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0023] Such as figure 1 As shown, a boxing glove with a negative Poisson's ratio effect includes a boxing glove liner 1, and the boxing glove liner 1 uses a polyurethane foam material with a negative Poisson's ratio effect to obtain a boxing glove with excellent performance;

[0024] The wrist width a, five-finger width b and joint width c of the boxing glove liner 1 satisfy: 8.5cm≤a≤9.5cm, 7.5cm≤b≤8.0cm, 2.5cm≤c≤3.3em;

[0025] The palm length d and the thumb thickness e of the back of the hand of the boxing glove liner 1 satisfy: 8.0cm≤d≤9.5cm, 0.56cm≤e≤0.93cm;

[0026] The width b and thickness t of the boxing glove liner 1 satisfy: 0.075≤t / b≤0.126;

[0027] The thickness f of the back of the hand of the boxing glove liner 1 satisfies: 0.55cm≤f≤0.91cm;

[0028] The bending angle θ at the finger joint of the liner 1 of the boxing glove satisfies...

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Abstract

The invention discloses a boxing glove with a negative Poisson's ratio effect and a design method thereof. The boxing glove is characterized by a concave structure design of liner polyurethane foam. The method comprises the steps of firstly, based on human hand shapes and existing boxing glove bodies, establishing a suitable boxing glove liner model and determining a basic size; then, placing thepolyurethane foam in an aluminum mold and conducting compression, heating, cooling and relaxation treatment on the polyurethane foam to obtain negative Poisson's ratio polyurethane foam with special concave structures; secondly, according to existing international boxing glove weight regulations, designing the thickness and distribution of the negative Poisson's ratio polyurethane foam in a liner,and conducting stress analysis by using relevant software to further determine the optimal thickness of the foam and the distribution in the liner. The boxing glove designed by the method has many advantages of the negative Poisson's ratio effect, and is proved to have strong novelty and practicability.

Description

technical field [0001] The invention relates to a boxing glove liner with a negative Poisson's ratio effect prepared by utilizing the concave structure design of polyurethane foam, which belongs to the field of new materials. Background technique [0002] Negative Poisson's Ratio effect means that when stretched, the material expands laterally within the elastic range; when compressed, the material shrinks laterally. This phenomenon is thermodynamically possible, but negative Poisson's ratio effects are not generally observed in materials. Some materials with special structures discovered in recent years have negative Poisson's ratio effects, and have attracted much attention from material scientists and physicists due to their peculiar properties. The study of negative Poisson's ratio materials is one of the emerging researches in the field of materials today. It has many excellent properties, such as good shear resistance, dent resistance, fracture resistance, surface iso...

Claims

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Application Information

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IPC IPC(8): A63B71/14B29C44/12B29K67/00B29L31/48
Inventor 周三峰任鑫王仕龙韩传镇袁建成罗钰茗邓洪永
Owner NANJING UNIV OF TECH
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