A non-positive Poisson's ratio cushioning energy-absorbing structure filled with circular tubes

Abstract

The invention relates to a non-positive Poisson's ratio buffer energy-absorbing structure filled with circular tubes, which includes circular tube cells and a base plate, the base plate includes an upper base plate, a lower base plate and a lateral arc base plate, and the upper base plate, the lower base plate and the lateral circular arc base plate The arc substrates are connected end to end to form a closed structure with negative Poisson’s ratio characteristics. The shape of the lateral arc substrates is determined iteratively; 1 The number of tubules is arranged horizontally in the central area of ​​the substrate, and above and below the layer, the tubules are arranged layer by layer according to the arithmetic sequence method, with a tolerance of 1, until they are attached to the upper and lower substrates; The contact areas with the round tubules are fixedly connected with each other; all the round tubules are not in contact with the lateral arc substrate. The structure of the present invention has zero Poisson's ratio or negative Poisson's ratio effect, and a single structure can obtain hierarchical crushing force without assembly, which is convenient for reducing impact overload.

Description

technical field [0001] The invention belongs to the technical field of spacecraft landing buffers, and relates to a non-positive Poisson's ratio buffer energy-absorbing structure filled with circular tubes. Background technique [0002] The buffer device is essential during the landing process of the spacecraft, and the spacecraft system needs to use the buffer device to reduce the impact of the landing process on the internal personnel and loads. Structural plastic energy absorption is a common form of energy absorption for buffer devices. For example, traditional buffer devices mostly use aluminum honeycomb (which will cause plastic deformation when crushed) for buffer energy consumption. The energy-absorbing structure is generally placed in a cylindrical cylinder. During the energy-absorbing process, the internal structural parts slide along the cylinder wall. Therefore, the energy-absorbing structure cannot contact the cylinder wall when it is crushed or after it is crus...

AI Technical Summary

Problems solved by technology

[0004] Although the aluminum honeycomb has high compression energy absorption efficiency, it has a slightly positive Poisson's ratio effect after crushing, and it is easy to contact the cylinder wall during the crushing process, causing scratches to the cylinder wall

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