Three-dimensional smooth curved surface dot matrix cell element, design method, dot matrix structure and part

Abstract

The invention relates to the technical field of material lightening, in particular to a three-dimensional smooth curved surface dot matrix cell element, a design method, a dot matrix structure and a part. According to the design method, an original lattice cell curved surface is discretized and deviated to obtain an equidistant deviation curved surface corresponding to each grid unit curved surface, new lattice cell elements in different shapes are formed through the equidistant deviation curved surfaces, the smooth and continuous characteristics of the equidistant deviation curved surfaces are guaranteed, and a non-dimensional deviation parameter is introduced to achieve the design of the lattice cell elements in different shapes. The geometric configuration of the curved surface dot matrix cell element can be conveniently changed, so that the mechanical property is regulated and controlled, the dot matrix cell element meeting the requirement is obtained, and the application of the three-dimensional smooth curved surface dot matrix cell element is wider. According to the dot matrix structure formed by distributing the multiple three-dimensional smooth curved surface dot matrix cell element arrays, dot matrix cell element configurations of different shapes can be selected according to needs, and the dot matrix structure meeting the needs is obtained. At least one part of the parts is of a lattice structure, and the parts have the mechanical property meeting the requirement.

Description

technical field [0001] The invention relates to the technical field of material lightening, in particular to a three-dimensional smooth surface lattice cell, a design method, a lattice structure and parts. Background technique [0002] At present, my country's aerospace field has entered a period of rapid development, and structural weight is a very important indicator, so the lightweight of structural parts is of great significance; at the same time, due to the complex working environment, there are higher requirements for the mechanical properties of aircraft structures . Lattice structure is a kind of porous lightweight structural material, which has the advantages of high specific stiffness, high specific strength and high specific energy absorption, etc. It is widely used in structural lightweight design in aerospace, vehicle, medical and other fields. [0003] With the continuous development of additive manufacturing technology and computer-aided design technology, a k...

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Problems solved by technology

The obtained lattice structure still has the following disadvantages: firstly, the surface structure configuration obtained by solving the implicit solution function equation as a whole is single and fixed, and the typical surface configuration must be obtained by solving the corresponding implicit solution function equation. Complicated, without corresponding overall adjustment parameters, it is difficult for those skilled in the art to make uniform adjustments to the overall shape while ensuring smooth continuity for the surface lattice cell configuration shape obtained by solving the implicit solution function equation as a whole, so that It is difficult to control the mechanical properties of the lattice, and the anisotropic mechanical properties of the lattice cannot be adjusted due to the fixed surface lattice configuration, which brings great difficulties to engineering applications

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