A discrete element modeling method for stochastic void defect materials based on hyperelliptic equation

A modeling method and superellipse technology, which is applied in the field of discrete element modeling and simulation of material defects, and can solve problems such as random shapes and positions.

Active Publication Date: 2019-02-22
XIANGTAN UNIV
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[0003] Judging from the literature and patents that have been mastered, there is st

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  • A discrete element modeling method for stochastic void defect materials based on hyperelliptic equation
  • A discrete element modeling method for stochastic void defect materials based on hyperelliptic equation
  • A discrete element modeling method for stochastic void defect materials based on hyperelliptic equation

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with accompanying drawing.

[0045] A discrete element modeling method for random hole defect material based on hyperelliptic equation, characterized in that the steps of establishing a discrete element model of random hole defect are as follows:

[0046] (1) Obtain the physical property parameters of the material;

[0047] (2) Generate a closed calculation area;

[0048] (3) To characterize the realization of the random center position of the hole defect;

[0049] (4) Based on the hyperelliptic equation, different hole defects are constructed at the center point of each hole defect according to the shape, size and inclination angle of the hole defect;

[0050] (5) The formation of hole defects;

[0051] (6) Select the particle contact model.

[0052] The specific process is:

[0053] (1) Obtain the physical property parameters of the material; mainly including elastic modulus, Poisson's ratio, co...

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Abstract

The invention provides a discrete element modeling method for stochastic void defect materials based on hyperelliptic equation, which can randomly generate ellipse, rhombus, star or rectangular cavitydefects with different flatness by controlling parameters, and is used for discrete element simulation research of hard and brittle materials. The concrete steps are as follows: defining the main physical parameters of the material, generating particles in a closed calculation area and assigning microscopic contact property parameters to the particles, and randomly determining a certain number ofvoid defect centers with random positions; Based on the hyperelliptic equation, the hole defect patterns with different shapes are constructed at each center point. Delete the particles in each holedefect pattern, select the appropriate contact model, delete the wall of the closed area, and form the discrete element model of the hole defect. The method of the invention is simple and feasible, and the size, shape, angle and flatness of the formed hole defects are controllable, so that the generated material model is closer to the reality, so that the simulation calculation result is more accurate, and the simulation effectiveness is improved.

Description

technical field [0001] The invention belongs to discrete element modeling and simulation research of material defects, in particular to a discrete element modeling method for random hole defect materials based on hyperelliptic equations. Background technique [0002] In traditional mechanics, materials are regarded as uniform, ideal solids without defects, but in actual production, various cracks and defects will inevitably occur during the preparation, processing and service of materials. Defects will lead to a certain degree of dispersion in the strength of the material and reduce the reliability of the material. For materials such as brittle materials such as rocks and ceramics, their defect sensitivity is more significant, and unpredictable fractures or fragments are prone to occur during processing and service, resulting in device failure. Therefore, it is very important to study the influence of various defects (such as shape, size, distribution density) on the mechan...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 姜胜强叶颖刘金刚刘思思徐志强
Owner XIANGTAN UNIV
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