Brittle material discrete element modeling method considering shape of hole defect and distribution randomness thereof

A technology of brittle materials and modeling methods, applied in instrumentation, design optimization/simulation, calculation, etc.

Active Publication Date: 2018-11-20
XIANGTAN UNIV
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Problems solved by technology

Judging from the literature and patents that have been mastered, there is no report on the modeling method that uses the discrete element method to generate hole defects with random shapes and positions, and can be applied to the simulation of brittle materials.

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  • Brittle material discrete element modeling method considering shape of hole defect and distribution randomness thereof
  • Brittle material discrete element modeling method considering shape of hole defect and distribution randomness thereof
  • Brittle material discrete element modeling method considering shape of hole defect and distribution randomness thereof

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing.

[0028] A discrete element modeling method for brittle materials considering the shape of hole defects and the randomness of their distribution is characterized in that the steps of establishing a discrete element model of hole defects are as follows:

[0029] (1) Enclosing a closed calculation area by establishing a boundary wall;

[0030] (2) Generate particles in the closed calculation area, whose particle radius obeys the uniform distribution or normal distribution and the position is randomly generated, assign values ​​to the particle density, damping, stiffness attributes and the attributes of the contact model between particles, and through the interaction of particles The effect makes it reach a stable and densely arranged state, and the basic material model is obtained;

[0031] (3) Generate polygons representing hole defects with random positions and random shapes...

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Abstract

The invention discloses a brittle material discrete element modeling method for considering a shape of a hole defect and the distribution randomness thereof, which is mainly used for the discrete element simulation research of brittle materials such as engineering ceramics. The method includes: creating a closed area, and adding a certain number of particles with uniformly or normally distributedradiuses into the closed area to achieve tight arrangement of the particles; selecting an appropriate contact model to give the particles a certain strength of connection keys; determining a certain number of randomly located hole defect centers through a position random function, and constructing each hole defect polygon with shape randomness; and finally deleting a closed area wall, and deletingthe particles in the polygon to form a hole defect. The method is easy to program, is simple to debug, conforms to the existence state of the actual brittle material defects, can make the simulationexperiment result more accurate, more in line with the actual situation, and can improve the effectiveness of the simulation experiment.

Description

technical field [0001] The invention belongs to the research on the simulation process of discrete element modeling experiments of brittle materials such as engineering ceramics, and specifically relates to a discrete element modeling method of brittle materials considering the shape of hole defects and the randomness of their distribution. Background technique [0002] Due to the rapid development of computer technology, the method of using computer modeling to simulate various materials for simulation experiments has received more and more support and acceptance, because compared with actual experiments, computer modeling and simulation also have the testing of various parameters. With the ability to measure, its value is close to the real value, and its parameter debugging is convenient and low in cost, which can provide valuable experimental parameters and results comparison for further real experiments. [0003] At present, the simulation of random shapes by discrete el...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 姜胜强叶颖黎旭谭援强张高峰徐志强
Owner XIANGTAN UNIV
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