Composite light structure with high energy absorbing rate and good buffer ability and structure main body

Abstract

The invention discloses a composite light structure with a high energy absorbing rate and good buffer ability and a structure main body. The composite light structure with the high energy absorbing rate and good buffer ability comprises a housing and an inner support, wherein the housing is sealed and hollow; the inner support is connected in the housing; the inner support is of a dot matrix structure; the inner support comprises a plurality of unit cells which are arranged according to a preset rule; and each cell unit is in the shape of a framework comprising a plurality of supporting rods. The composite light structure with the high energy absorbing rate and good buffer ability and the structure main body disclosed by the invention have the characteristics of relatively small weight, relatively high specific areas, strong energy absorbing ability and relatively strong buffer ability.

Description

technical field [0001] The invention relates to the technical field of lightweight structure engineering, in particular to a composite lightweight structure with high energy absorption rate and good buffering capacity and a composite lightweight structure body with high energy absorption rate and good buffering capacity. Background technique [0002] In recent years, with the rapid development of the aerospace science and technology industry, in order to meet the dual requirements of function and structural load-bearing, the new generation of aircraft has put forward higher requirements for the mechanical properties and functions of the materials used. Now, lightweight porous materials with physical light weight, high specific area, high mechanical strength and toughness, strong ability to absorb mechanical energy, easy heat dissipation in heat transfer, and good heat insulation are considered to be the most promising advanced structural materials. [0003] At present, light...

AI Technical Summary

Problems solved by technology

The mechanical properties of individual structures show large differences in all directions; structural stiffness and energy absorption cannot be balanced

Taking the lattice structure as an example, because the lattice structure has a large porosity, it has a lighter weight and a higher specific area than the solid structure; the lattice structure can give full play to the role of structural materials, compared with Because the strength of the solid structure has decreased, but the strength-to-mass ratio has increased; the load-displacement curve of the lattice structure will have a longer platform stage, which greatly improves the energy absorption capacity of the lattice structure; due to the surface area of ​​the lattice structure Large, so the heat dissipation is fast; however, the struts in the lattice structure will buckle when loaded, the smaller the diameter of the struts, the smaller the buckling stress, the smaller the buckling load, and the smaller the value of the ordinate load of the load-displacement curve , will affect the area enclosed by the load-displacement curve, and ultimately affect the energy absorption capacity

Shell structure has lighter weight and higher specific area, but weaker compressive capacity

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