Pulled polycellular configuration and energy-absorbing structural member

Abstract

The invention discloses a pulled multicellular configuration and an energy-absorbing structure component, comprising a plurality of unit cell structures, wherein each unit cell is obtained by cleverlysplicing two typical concave characteristic structures and two arrow-shaped structures; the pulled multicellular configuration and the energy-absorbing structure component comprise a plurality of unit cell structures. The vertices of the concave corners on the left and right sides of the concave eigenstructure are connected with two arrow-shaped eigenstructures respectively, and the vertices of the concave corners of the two arrow-shaped eigenstructures are connected with half of the transverse bars of the other two concave eigenstructures, which together form a single cell structure with anexpanded multicellular configuration; the vertices of the concave corners of the left and right sides of the concave eigenstructures are connected with each other. Then the two-dimensional stretched polycyclic configuration is obtained by planar array. The polycellular material has negative Poisson's ratio property, which shrinks when compressed, thus locally densifying the compressed region. Thisunique deformation characteristic makes the polycellular material have stronger indentation resistance and impact resistance. In addition, by changing the slenderness ratio and inclination angle of the rod, the elastic properties and compression strength of the rod are adjusted.

Description

technical field [0001] The invention relates to an auxetic configuration, in particular to an auxetic multicellular configuration and an energy-absorbing structural component. Background technique [0002] Compared with traditional positive Poisson's ratio materials, negative Poisson's ratio materials will shrink perpendicular to the direction of compression, which means that the geometric effect will be strengthened, and the particles or fibers in the compression area will produce local densification, making the material With higher compression resistance, indentation resistance, shear resistance and compression strength, it has great application potential in packaging and shock absorption and cushioning design. Studies have shown that negative Poisson's ratio characteristics can also produce higher fracture toughness and acoustic damping. In addition, the negative Poisson's ratio enables the negative Poisson's ratio honeycomb core to produce hemispherical deformation when...

AI Technical Summary

Problems solved by technology

[0003] Auxetic materials have many excellent properties, but auxetic materials also have limitations in some aspects

Since most auxetic materials require a large number of pores, the stiffness of auxetic materials is much lower than that of the materials that make up their structures, which also limits the application of auxetic materials in engineering components

Images