Filling method of dot matrix cell structure part

Abstract

The invention relates to a filling method of a dot matrix cell structure part. The filling method comprises the steps that a dot matrix cell mechanical property library is established according to part design requirements; establishing a geometric finite element model of the part; carrying out topological analysis on the part structure under a given load condition to obtain topological optimization density; dividing functional regions according to the topological optimization density distribution, wherein the functional regions comprise an entity region and different dot matrix regions; and according to the functional area, dot matrix cell element structure part filling is carried out, and a homogeneous solid structure is obtained. According to the method, the mechanical property of the lattice cell structure is obtained by adopting a homogenization method, and the filled lattice cell structure is equivalent to a solid structure for part simulation, so that the simulation analysis process can be accelerated, and the calculation and solution difficulty and time are reduced.

Description

technical field [0001] The invention relates to the technical field of lightweight structure, in particular to a filling method for lattice cell structure parts. Background technique [0002] Lattice cell structure is a porous structure composed of periodic arrays of single cells, with many excellent properties, such as ultra-light, high strength, heat insulation, heat transfer, impact resistance, can replace traditional solid structures, reduce weight, enhance more Functional properties have broad application prospects in the aerospace and defense industry, medical biology, and construction machinery industries. In the process of part optimization design, the lattice cell structure is used to replace the solid structure, which can improve the performance of the part while reducing the weight of the part. [0003] Lattice cells have rich configurational forms and exhibit different mechanical properties. By comprehensively considering the distribution position, shape struct...

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing lattice cell structures used to fill parts have a single configuration or a single density. When facing parts under complex working conditions, the internal stress presents non-uniform distribution characteristics

Therefore, in the process of part optimization design, if all lattice cells with larger diameter or better structural strength are used for filling, material waste will be caused in areas with less stress. Filling with poor lattice cells will cause insufficient stress in areas with high stress, making it difficult to take advantage of lattice cell structure filling

[0005] At the same time, the struts of the lattice cell structure are small in size and have many units. In the finite element simulation, a large number of meshes need to be divided to simulate the geometric shape, resulting in a huge amount of calculation, which also makes the part simulation after the lattice cell structure is filled Analysis creates difficulties, which is not conducive to rapid iteration of products

Images