Finite element simulation method of aluminum honeycomb structure

Abstract

The invention discloses a finite element simulation method of an aluminum honeycomb structure, comprising the following steps: establishing an aluminum honeycomb CAD model according to the actual size of the aluminum honeycomb structure in three-dimensional CAD software, and the aluminum honeycomb CAD model is formed by 7 holes of the same size; The section of each cavity is a regular hexagon; the established aluminum honeycomb CAD model is imported into the finite element preprocessing software, and the surface of each cavity is divided into a four-node quadrilateral shell element; in each shell element A 2-node beam element is generated on the edge, and the beam element distributed at the top and bottom of the socket is recorded as the first beam element, and the beam element distributed in the middle of the socket is recorded as the second beam element; assign the shell element to the Stress-strain curves under quasi-static conditions and assigned stiffness curves for the first and second beam elements. The invention can accurately reflect the mechanical properties and deformation modes along the axial direction of the socket and in the direction perpendicular to the axial direction of the socket.

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 kind of wavy aluminum foil formed by rolling with adhesive to form a structure with hexagonal cells similar to honeycomb. like figure 1 As shown, a basic aluminum honeycomb structure consists of 7 cells with a regular hexagonal cross-section. The side length of the regular hexagon is 1-1, which is represented by a, and the length of the socket is 1-2, which is represented by b; each socket is composed of 6 faces, which are 1-3 to 1-8. As an important energy-absorbing element, the structure can produce stable collapse deformation and absorb a large amount of energy when it is compressed and deformed along the axis of the socket. [0003] In the automotive industry, aluminum honeycombs are used to make "model vehi...

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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

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