A negative Poisson's ratio metamaterial structure based on metal rubber and its working method

Abstract

The present invention relates to a metal-rubber-based negative Poisson's ratio metamaterial structure and operating method. The metamaterial structure cell is formed by periodically extending the metamaterial structure along the x- and y-axes. The metamaterial structure cell comprises four metal-rubber blocks arranged in a 2×2 array. The four metal-rubber blocks within the metamaterial structure cell form a diamond-shaped structure. A core shaft passes through the center of the metal-rubber block, and connectors are connected at both ends of the core shaft. Four cross-shaped sockets are provided on the sides of the connectors, with the axes of the four connectors parallel to the diagonals of the end faces of the metal-rubber blocks. The connectors of adjacent metal-rubber blocks are connected by an elastic curved beam, the ends of which are inserted into the connector sockets. The negative Poisson's ratio metamaterial structure of the present invention exhibits excellent repeatable impact resistance, vibration damping, and mechanical load-bearing properties, enhanced adaptability to extreme environments (high temperature, high pressure, corrosion, and radiation), and excellent friction damping properties.

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