Discrete element modeling method and application for reconstructing multi-component composite materials

Abstract

The invention belongs to the related technical field of composite material reconstruction, and discloses a discrete element modeling method and application for reconstructing multi-component composite materials. The method includes: acquiring the particle morphology and internal crystal structure of the multi-component composite material to be reconstructed, generating corresponding crystal templates for different crystal morphology; reconstructing the surface grid of the particle based on the particle morphology, and Generate a sphere surrounding the surface grid; generate a crystal template in the sphere; obtain the vertex information of each crystal template and store it in the corresponding array; refill multiple ball units in the sphere, and determine whether the ball unit is in the crystal template If it exists, delete it, or keep it; compress the reconstructed particles with the shape of the particles as the target, reconstruct all the particles that make up the multi-component composite material in this way, and then accumulate all the obtained particles naturally to obtain Reconstructed multicomponent composites. This application can truly simulate the microstructure of multi-component composite materials.

Description

technical field [0001] The invention belongs to the related technical field of composite material reconstruction, and more specifically relates to a discrete element modeling method and application for reconstructing multi-component composite materials. Background technique [0002] Soil-rock mixture (SRM) is a heterogeneous, non-continuous, non-linear special geological body composed of larger rocks, fine-grained soil and pores, and has complex mechanical properties. It is widely distributed in nature, especially in the Three Gorges area of ​​the Yangtze River, Jinsha River, Lancang River and other southwestern regions, as well as the southeastern coastal areas. In addition, the abandoned mineral piles and construction waste generated in mining engineering and modeling engineering can also be considered as special types of soil-rock mixtures, and if they are not handled properly, they will cause disastrous consequences. The traditional macroscopic continuum mechanical mode...

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Problems solved by technology

Chinese patent CN107730513B discloses a particle identification and tracking method based on spherical harmonic invariants, which uses CT scanning technology to study sand particles at different loading stages in micro-soil mechanics tests to track the movement behavior of all sand particles, but its It can only capture the surface morphology of particles, and does not identify the type of material. It cannot characterize the movement, deformation, and fragmentation behavior of multi-component composite particles, as well as the internal crystal fragmentation, interface behavior, and fabric evolution of the particles. , and in real life, especially in the field of geotechnical engineering, more than 95% of rock and soil are multi-component particles. Therefore, it is of great significance to construct a new research method to accurately characterize the microscopic properties of multi-component particles.

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