Particle flow simulation of fracture characteristics and crack propagation mechanism of holed-cracked Brazilian disc specimen

HUANG Yan-hua; YANG Sheng-qi

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Particle flow simulation of fracture characteristics and crack propagation mechanism of holed-cracked Brazilian disc specimen

更新时间：2026-06-25

- Particle flow simulation of fracture characteristics and crack propagation mechanism of holed-cracked Brazilian disc specimen
- Vol. 35, Issue 8, (2014)
- 作者机构：
  
  1. 中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏,徐州,221008
  2. 武汉大学岩土与结构工程安全湖北省重点实验室,武汉,430072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU45
- Online First：14 August 2014，
  
  Published：2014
- 稿件说明：
移动端阅览
HUANG Yan-hua, YANG Sheng-qi. Particle flow simulation of fracture characteristics and crack propagation mechanism of holed-cracked Brazilian disc specimen[J]. 2014, 35(8).
DOI：

HUANG Yan-hua, YANG Sheng-qi. Particle flow simulation of fracture characteristics and crack propagation mechanism of holed-cracked Brazilian disc specimen[J]. 2014, 35(8). DOI：

摘要

基于室内岩石类脆性材料圆盘试样巴西试验结果，利用颗粒流程序（PFC），获得一组能够反映其力学特征的细观参数。在此基础上，对孔槽式圆盘试样进行巴西试验模拟，分析了裂隙倾角和半径比变化对孔槽式圆盘试样力学参数和裂纹扩展规律的影响。孔槽式圆盘试样力学参数显著低于完整圆盘试样，降幅与孔槽几何参数密切相关。劈裂荷载随裂隙倾角的增大呈非线性变化，而随着半径比的增大呈近似线性减小规律。通过分析认为，在试验模拟范围内保持半径比不变，当裂隙倾角较小时，孔洞是主裂纹起裂的主要诱因；裂隙倾角较大时，裂隙成为主裂纹起裂的主要诱因。保持裂隙倾角不变，当半径比较小时，裂隙是主裂纹起裂的主要诱因；半径比较大时，孔洞成为主裂纹起裂的主要诱因。最后，从细观层面探讨了孔槽式圆盘试样裂纹扩展机制。

Abstract

Based on the experimental results of intact Brazilian disc of rock-like materials

a set of mecroscopic parameters in particle flow code (PFC) that can reflect the macroscopic mechanical behavior of rock-like materials under Brazilian test are obtained. Then PFC is used to simulate Brazilian test for holed-cracked Brazilian disc (HCBD) specimen. The effect of crack angle and radius ratio on the mechanical parameters of HCBD specimen is analyzed. Compared with intact specimen

the split load of HCBD specimen takes on a reducing tendency

and the reducing extent is closely related to pre-hole and crack parameters. The split load is non-linearly changed as crack angle increasing

but linearly decreases as the increase of radius ratio. In the range of simulation test

when the crack angle is smaller

the hole is the main reason resulting in the main crack initiation; while the crack angle is bigger

the reason of main crack initiation results from the pre-existing crack. When the crack angle is a constant and the radius is relatively smaller

the pre-existing crack is the main reason of main crack initiation; while the crack angle is bigger

the main crack initiation results from the pre-existing hole. Finally

the crack propagation mechanism of HCBD specimen is discussed.

关键词

Keywords

references

Views

1507

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Experimental study of flexural behavior of anchored rock

Modeling initiation and propagation of main and secondary cracks of rock under combined compression and shear loading using extended finite element method

Test study of mechanical properties and failure characteristics of anchored rock

Disturbance mechanism of blasting excavation to aquiferous rock crack propagation

A block-discrete-spring model to simulate failure process of rock

Related Author

CHEN Lu

ZANG Chuan-wei

YU Feng-hai

TAN Yun-liang

ZHAO Tong-bin

ZHANG Zhi-jun

SHI Fang

GAO Feng

Related Institution

School of Resources and Safety Engineering, Central South University

College of Minging and Safety Engineering, Shandong University of Science and Technology

School of Nuclear Resource Engineering, University of South China

State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology

School of Mechanics & Civil Engineering, China University of Mining and Technology

AI问答

⁰