Mirror frame with negative Poisson's ratio effect and design method thereof

A negative Poisson's ratio, frame technology, applied in glasses/goggles, optics, instruments, etc., can solve the problems of lens flying and broken, glasses frame easily broken, etc., to achieve the effect of high impact strength

Pending Publication Date: 2019-08-16
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Glasses are one of the items that people often use, but in many unexpected situations, the frame of the glasses is easy to break, and even the lenses fly out and break, etc.

Method used

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  • Mirror frame with negative Poisson's ratio effect and design method thereof
  • Mirror frame with negative Poisson's ratio effect and design method thereof

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Embodiment Construction

[0019] Below in conjunction with specific embodiment and accompanying drawing, the present invention is further described:

[0020] like figure 1 and 2 As shown, a mirror frame with a negative Poisson's ratio effect includes a mirror frame 1 and a mirror ring 2, and the mirror frame 1 and the mirror ring 2 are perforated structures with periodic horizontal and vertical alternating holes;

[0021] The hole shape of the hole structure of the mirror frame 1 and the mirror ring 2 includes an ellipse, a triangle and a polygon; the hole structure is a metal material or a plate;

[0022] The inner width L of the frame should satisfy: 120mm>L>139mm; the thickness d of the frame depends on the thickness of the lens, generally: 2.5mm>d>3.5mm;

[0023] The height H of the mirror ring 2 should satisfy: 15mm>H>36mm.

[0024] The above-mentioned design method of a mirror frame with negative Poisson's ratio effect comprises the following steps:

[0025] 1) Determine the shape and size of...

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Abstract

The invention discloses a mirror frame with negative Poisson's ratio effect and a design method thereof. The mirror frame comprises a mirror bracket and a mirror ring, wherein the mirror bracket and the mirror ring are of a perforated structure with periodic transverse and vertical alternate holes; the shape of the hole structure of the mirror bracket and the mirror ring comprises an ellipse, a triangle and a polygon; the inner width L of the mirror frame is required to meet the following requirements: 120 mm>L>139 mm; the thickness d of the mirror frame is required to meet the following requirements: 2.5 mm>d>3.5 mm; and the height H of the mirror ring is required to meet the following requirements: 15 mm>H>36 mm. The material with the hole structure designed by the method has a large negative Poisson's ratio effect. The mirror frame shows a negative Poisson's ratio effect under the condition of being pressed, and can bear larger impact force without breaking compared with the traditional mirror frame, so that the lens is well protected, and the mirror frame is lighter and higher in strength.

Description

technical field [0001] The invention relates to a mirror frame with negative Poisson's ratio effect by utilizing a negative Poisson's ratio hole structure, and proposes a design method of a negative Poisson's ratio material mirror frame, which belongs to the field of new materials and new structures. Background technique [0002] Negative Poisson's ratio material is a material with the properties of expansion under tension or contraction under compression, and is a kind of functional material with high engineering application value. Negative Poisson's ratio materials have special physical, mechanical and deformation properties. For example, the negative Poisson's ratio effect can improve the mechanical properties of materials, including shear modulus, fracture toughness, thermal shock, strength, and indentation resistance. It is precisely because of these excellent properties that negative Poisson's ratio materials have more and more broad application prospects in the field...

Claims

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Application Information

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IPC IPC(8): G02C5/02G02C5/14G02C5/00
CPCG02C5/02G02C5/14G02C5/008
Inventor 任鑫骆陈韩传镇王仕龙张相玉
Owner NANJING UNIV OF TECH
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