A bullet with a negative Poisson's ratio effect and a design method thereof

Abstract

The invention discloses a bullet head with a negative Poisson's ratio effect and a design method thereof. The bullet head comprises a bullet head cylindrical section with a negative Poisson's ratio design, and a bullet head cone tail and a bullet head tip which are matched with each other. The bullet head cylindrical section is of a tubular structure with holes which are periodically, transverselyand vertically alternated; the tubular structure comprises a plurality of holes, the central axis of one hole is perpendicular to the central axis of the other adjacent hole, namely, the axis of eachhole is orthogonal to the adjacent hole structure, the holes in the rows and the columns are periodically arranged to form the tubular structure, and the tubular structure is the tubular structure with the negative Poisson's ratio effect. The bullet designed through the method has a large negative Poisson's ratio effect and has the characteristic of reducing energy loss caused by friction betweenthe bullet and the gun barrel, the initial speed of the bullet is higher, the penetrating power of the bullet is higher, the service life of the gun barrel is greatly prolonged, and the bullet betteradapts to actual requirements.

Description

technical field [0001] The invention relates to the technical field of negative Poisson's ratio effect design, in particular to a bullet with negative Poisson's ratio effect and a design method thereof. Background technique [0002] Bullets can be said to be a product of civilization that combines physics, chemistry, materials science, aerodynamics, and craftsmanship. Despite its use in relation to killing, the bullet remains the man of choice until new technologies for projecting energy are introduced. How to improve the penetrability of bullets and reduce the energy loss when exiting the chamber has always been a hot topic of research. Due to their unique characteristics, negative Poisson's ratio materials and structures are increasingly used in different fields. Negative Poisson's ratio tubular structures have been fabricated and studied, a simple tubular structure that exhibits negative Poisson's ratio behavior in both compression and tension. Combining a bullet with a...

AI Technical Summary

Problems solved by technology

However, most of the existing literature is still based on two-dimensional negative Poisson's ratio material research

Most of the three-dimensional negative Poisson's ratio materials are porous structures with complex internal structures. Due to the backward manufacturing technology in the past, there are few three-dimensional negative Poisson's ratio materials that are actually used in practice.

[0004] Most of the designed and manufactured negative Poisson's ratio material substrates are rubber, with weak load-bearing capacity and impact resistance

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