Composite needle for two-dimensional negative Poisson's ratio structure textile and purpose thereof

Abstract

The invention discloses a composite needle for two-dimensional negative Poisson's ratio structure textile, and the composite needle comprises a needle heel and a needle consolidated on the needle heel; the needle has a conical body; the needle heel is a cylinder that has a uniform cross section; the lower end section of the needle and the surface at one end of the needle heel have the same cross section shape; the cross section shapes of both the needle and the needle heel have a negative Poisson's ratio structure. Based on different molding structures and sizes, the height and the negative Poisson's ratio shape of the composite needle (comprising the needle and the needle heel) are selected; the composite needles are arranged to form a needle group through a certain array shape; a number of needle groups are used to form a needle-bar that can be used to process textile in great width. In this way, the textile with negative Poisson's ratio effect can be obtained. The process is simple, rapid and precise; the method is suitable for materials like non-fabrics, composite material, foam, rubber, membrane, plastic, timber and metal; the two-dimensional negative Poisson's ratio structure can be constructed by puncturing, and the negative Poisson's ratio effect can be applied in the material.

Description

technical field [0001] The invention relates to a composite needle formed by a two-dimensional negative Poisson's ratio structure textile and its application in processing textile materials with a negative Poisson's ratio effect. Background technique [0002] A variety of substances with negative Poisson's ratio effects have been found in nature. After research, it has been found that materials with negative Poisson's ratio effects have special properties that traditional materials do not have, and their shear stiffness, fracture toughness, compressive strength, and isotropic curvature Compared with traditional materials, its energy absorption capacity and permeability have been improved. These excellent mechanical properties make negative Poisson's ratio materials have potential applications in the fields of automobile industry, body protection, aerospace, biomedicine and national defense. At present, the research on negative Poisson's ratio structural materials is mostly ...

AI Technical Summary

Problems solved by technology

At present, the research on negative Poisson's ratio structural materials is mostly concentrated in foam and polymer materials, and there are few reports on textile materials. Although there are related two-dimensional negative Poisson's structure textile materials. Auxetic effect, but the production is cumbersome, the production efficiency is low, and special improved knitting equipment is required, the cost is high, and it is difficult to meet the large demand in the market

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