Deformation and fracturing characteristics of fracture network model 
and influence of filling based on 3D printing and DIC technologies

ZHANG Ke; QI Fei-fei; CHEN Yu-long

doi:10.16285/j.rsm.2019.1625

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Deformation and fracturing characteristics of fracture network model and influence of filling based on 3D printing and DIC technologies

更新时间：2026-06-25

- Deformation and fracturing characteristics of fracture network model and influence of filling based on 3D printing and DIC technologies
- Vol. 41, Issue 8, Pages: 2555-2563(2020)
- 作者机构：
  
  1. 昆明理工大学电力工程学院,云南,昆明,650500
  2. 中国矿业大学（北京）能源与矿业学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2019.1625
  CLC： TU45
- Online First：17 October 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Ke, QI Fei-fei, CHEN Yu-long. Deformation and fracturing characteristics of fracture network model and influence of filling based on 3D printing and DIC technologies[J]. 2020, 41(8): 2555-2563.
DOI：

ZHANG Ke, QI Fei-fei, CHEN Yu-long. Deformation and fracturing characteristics of fracture network model and influence of filling based on 3D printing and DIC technologies[J]. 2020, 41(8): 2555-2563. DOI： 10.16285/j.rsm.2019.1625.

摘要

由于工程岩体内部裂隙分布的复杂性，含裂隙网络的物理模型制作是困扰岩石力学试验研究的关键问题之一。提出了一种以水溶性材料为打印基材，以聚乳酸材料为支撑底座的裂隙网络模型3D打印方法。利用打印材料的水溶特性，提出了一种裂隙网络类岩石模型试件制备方法。利用数字图像相关方法，定量研究了裂隙网络类岩石模型试件加载过程中的变形破裂特征，并进一步分析了填充物的影响规律。试验结果表明：采用3D打印技术可以实现复杂裂隙网络模型的制备，模型试件力学特性具有很好的可重复性；裂隙网络类岩石模型试件应力-应变曲线在峰前出现多次明显的应力跌落，而峰后曲线呈现出塑性应变软化现象；DIC技术可以捕捉裂隙网络类岩石模型试件加载全过程的全局应变场，其变形破裂过程表现出应变局部化渐进演化特性，反映了裂纹萌生、扩展及贯通规律；不同的裂隙填充工况会影响模型试件的力学参数和应变场分布，这体现了所提出制备方法的优势，即能够填充符合工程实际情况的裂隙填充物。

Abstract

Due to the complexity of fracture distribution in engineering rock mass

the physical modeling of fracture network is one of the key problems in rock mechanics experiments. In this study

a 3D printing method of fracture network model based on water-soluble materials with polyactic acid materials as supporting base is proposed. Based on the water solubility of printing material

a method for preparing rock-like model specimens containing fracture network is established. Through digital image correlation (DIC) method

the deformation and fracturing characteristics of rock-like model specimens during loading process are quantitatively studied

and the influence law of filling material is further analyzed. The experimental results show that 3D printing technology is capable to prepare complex fracture network model with satisfied repeatability of mechanical properties. The stress-strain curve of fracture network rock-like model presents several evident stress reductions before its peak strength

whereas the plastic strain softening is encountered after peak strength. DIC technology can capture the global strain field of fracture network rock-like model during the whole loading process. Moreover

the progressive evolution of strain localization is observed in the process of deformation and fracturing

which reflects the law of crack initiation

propagation and coalescence. The mechanical parameters and strain field distributions of model specimens are influenced by different filling conditions. The advantage of the proposed method is reflected by the fact that the filling material can be filled into the fractures in accordance with the actual engineering condition.

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