A mechanical energy absorbing metamaterial based on a buckle structure and its manufacturing method

Abstract

The invention relates to a mechanical energy absorption metamaterial based on a buckle structure and a production method of the mechanical energy absorption metamaterial, wherein the metamaterial comprises a plurality of single-layer mechanical metamaterials which are arranged in an array; every two adjacent single-layer mechanical metamaterials are arranged in a mirror image way and are fixedly connected by a hard partition plate, wherein each of the single-layer mechanical metamaterial comprises a matrix provided with a plurality of independent buckle grooves side by side along a length direction, and a flexible connecting beam is formed in a position, between every two adjacent buckle grooves, on the matrix; each of the buckle grooves comprises a buckle and a clamping groove which are matched with each other and are spaced for a fixed distance; each of the single-layer mechanical metamaterials is made of a flexible elastomer; each of the single-layer mechanical metamaterials comprises a first stable state that the buckle is separated from the clamping groove and a second stable state that the buckle is combined with the clamping groove; when a load applied by the outside reaches the maximum value of mechanical energy absorption, each of the single-layer mechanical metamaterials can be switched from the first stable state to the second stable state; and when a load with an opposite direction is applied, each of the single-layer mechanical metamaterials can be restored to the first stable state.

Description

technical field

[0001] The invention belongs to the field of mechanical energy absorption, and in particular relates to a mechanical energy absorption metamaterial based on a buckle structure and a manufacturing method thereof. Background technique

[0002] In engineering accidents, the commonly used anti-collision methods absorb mechanical energy through the destructive deformation of metals, plastics, ceramics and other materials, thereby reducing the losses caused by accidents and protecting the safety of the parties or precision instruments, such as car bumpers, highways, etc. Anti-collision barriers that are often used on the road. However, these methods are not reusable, and once these mechanical energy absorbing structures are fabricated, their mechanical energy absorbing properties are fixed and not adjustable, which limits their application fields and engineering use costs. larger. Especially in occasions where accidents occur frequently, broken anti-collision com...

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