Method for generating brittle material containing random irregular polyhedron hole defects

A brittle material, polyhedron technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problems of cumbersome commissioning process, cost-effective gold, waste of manpower and material resources, etc.

Active Publication Date: 2019-07-05
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the coating material is more expensive than gold, and the test run process is cumbersome. If the porosity distribution, pore size,

Method used

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  • Method for generating brittle material containing random irregular polyhedron hole defects
  • Method for generating brittle material containing random irregular polyhedron hole defects
  • Method for generating brittle material containing random irregular polyhedron hole defects

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] (1) Generate a certain number of particles in a closed calculation area, assign values ​​to the density, damping, stiffness attributes of the particles, and the attributes of the contact model between particles, and make them reach a stable and tightly arranged state through the interaction of the particles, Obtain the basic model of brittle materials;

[0023] (2) Import the porosity of the material, run the position random function, and generate the position and distance of the defect center;

[0024] (3) Generate irregular polyhedrons with random positions and shapes: determine a certain number of hole defect centers O with random positions through the position random function in the calculation area i And get the defect center O in the global coordinate system G i The coordinates (a i , b i , c i ); in order to control the shape of the polyhedron representing the hole defect, a new coordinate axis direction is generated by a random function, and the angle betwee...

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Abstract

The invention discloses a method for generating a brittle material containing the random irregular polyhedron hole defects, which is mainly used for the discrete element simulation research of the brittle materials, such as engineering ceramics, etc. The method comprises the steps of firstly establishing a closed area, and generating a certain number of particles with corresponding attributes in the closed area, wherein the particles obey random distribution and close arrangement; then, selecting an appropriate contact model, and endowing the particles with contact bonds with certain strength;and then determining a certain number of irregular polyhedral hole defects with random positions and shapes; and finally, deleting the particles in the holes to form the hole defects. The method is easy to program and realize, more accords with the defect existing state in the actual brittle material, enables the simulation result to be more accurate, more accords with the actual situation, and improves the effectiveness of the simulation experiment.

Description

technical field [0001] The invention belongs to the research in the modeling experiment simulation process of brittle material defects such as engineering ceramics, and specifically relates to a method for generating brittle materials containing random irregular polyhedral hole defects. [0002] technical background [0003] Due to the rapid development of computer technology, the method of simulating various materials by computer modeling for simulation experiments is more and more popular and supported by researchers, because compared with actual experiments, computer modeling and simulation also have various parameters. Test and measurement capabilities, which can more accurately reflect the real value, and its parameters are easy to debug and low cost, and can further provide valuable experimental parameters and result comparisons for real experiments. [0004] In the process of material preparation, there will inevitably be some defects, such as voids, cracks, inclusions...

Claims

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Application Information

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IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 姜胜强唐超刘思思徐志强刘金刚
Owner XIANGTAN UNIV
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