Aluminum honeycomb structure finite element simulation method

Abstract

The invention discloses an aluminum honeycomb structure finite element simulation method which comprises the following steps that an aluminum honeycomb CAD model is established in three-dimensional CAD software according to the actual size of an aluminum honeycomb structure, the aluminum honeycomb CAD model is formed by seven nest holes with the same size, and the section of each nest hole is in aregular hexagon shape; importing the established aluminum honeycomb CAD model into finite element preprocessing software, and dividing the surface of each nest hole into a four-node quadrilateral shell unit; a two-node beam unit is generated on each edge of the shell unit, the beam units distributed at the top and the bottom of the nest hole are marked as first beam units, and the beam units distributed in the middle of the nest hole are marked as second beam units; endowing the shell unit with a stress-strain curve under a quasi-static condition, and endowing the first beam unit and the second beam unit with rigidity curves. According to the invention, the mechanical properties and deformation modes in the axial direction of the nest hole and in the direction perpendicular to the axial direction of the nest hole can be accurately reflected.

Description

technical field [0001] The invention belongs to the technical field of finite element analysis of automobiles, and in particular relates to a finite element simulation method of an aluminum honeycomb structure. Background technique [0002] Aluminum honeycomb is a structure with honeycomb-like hexagonal cells formed by bonding wavy aluminum foil formed by rolling with adhesive. Such as figure 1 As shown, a basic aluminum honeycomb structure consists of seven cells with regular hexagonal cross-sections. The side length of the regular hexagon is 1-1, represented by a, and the length of the cell is 1-2, represented by b; each cell consists of 6 faces, which are 1-3 to 1-8 respectively. As an important energy-absorbing element, the structure can produce stable collapse deformation and absorb a large amount of energy when subjected to compression deformation along the axial direction of the socket hole. [0003] In the automotive industry, aluminum honeycombs are used to creat...

AI Technical Summary

Problems solved by technology

When the rate of compressing the aluminum honeycomb structure increases, its mechanical properties will be significantly improved, but the above four types of simulation methods can only reflect the air effect at a certain rate

Images