Foam microstructure modeling method based on foaming process

Abstract

The invention provides a foam microstructure modeling method based on a foaming process. The foam microstructure modeling method comprises the following five steps including determining a foam foaming process, determining hole structure characteristics, generating nucleation points, growing and shaping holes, and visually modeling a hole structure. A foam microstructure model established through the method is highly similar to real foam and consistent in hole feature. The model established by the method can represent the randomness of a real foam hole structure, and the hole position distribution uniformity, the hole size uniformity, the hole number and the hole average size can be adjusted by adjusting parameters so as to obtain the model with very high similarity with the actual foam hole structure. The foam microstructure modeling method based on the foaming process is suitable for most open-cell and closed-cell foam materials, and the established microstructure model can accurately simulate the heat, electricity, sound, force and other properties of the foam materials.

Description

technical field [0001] The present invention relates to a modeling method for the mesostructure of foam materials, more specifically relates to a method based on the foaming process, which is more in line with the real pore structure, and is suitable for modeling the mesostructure of various natural and artificial foam materials The method belongs to the research field of porous materials. Background technique [0002] The apparent properties of porous materials depend directly on the shape and structure of pores, which is of great significance to the optimization of foam preparation process and foam material selection. Therefore, it is necessary to establish a microstructure model of the foam, and then study the properties of the foam material such as force, heat, sound, and electricity. [0003] At present, there are mainly three ways to establish the microstructure of the foam: (1) the mesostructure unit cell established by the geometric method, which cannot reflect the ...

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Problems solved by technology

[0003] At present, there are mainly three ways to establish the microstructure of the foam: (1) the mesostructure unit cell established by the geometric method, which cannot reflect the complexity and randomness of the foam microstructure, so it is difficult to accurately simulate the foam microstructure Various performance

(2) The mesoscopic structure of the foam was established using the Voronoi stochastic model. This model treats the pore-strut and the pore wall as polygons and polyhedrons, respectively. This method is difficult to guarantee the gradual characteristics of the ligament and the real cross-sectional shape, and it is also difficult to characterize both. Foam with open and closed cells

(3) Slicing along the cross-section of carbon foam based on automatic continuous slicing technology, and taking pictures to record the cross-section information, and then synthesizing the three-dimensional structure. This method can obtain the precise microstructure of the foam, but it is expensive, and only a small piece can be obtained each time. Small-volume mesostructure, and it is difficult to accurately reproduce the microstructure of foams with low porosity and small-sized pores

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