Experimental and numerical modeling of deformation-cracking mechanics of 3D-printed rock samples with single fracture

IF 9 1区地球科学 Q1 ENERGY & FUELS Advances in Geo-Energy Research Pub Date : 2023-05-15 DOI:10.46690/ager.2023.05.06

R. Song, Jun Tian, Mingyang Wu, J. Liu

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引用次数: 1

Abstract

: The analysis of mechanical response and deformation-cracking behavior contributes to the high-efficiency extraction of geo-energy and long-term safety of underground engineering structures. Compared to natural cores, the mechanical properties of 3D-printed samples made from quartz sand as raw material are relatively homogeneous, and can be used for quantitative studies on the influence of natural defects on the mechanical properties of rocks. In this work, 3D-printed samples with single fractures of different crack angles, lengths and widths were fabricated and used for uniaxial compression tests. Adopting the digital image correlation method, the stress-strain distribution during uniaxial compression tests were visualized, and the influence of prefabricated fracture characteristics (dip angle, length, and width) on the deformation-failure process were studied. An extended finite element method subroutine for ABAQUS ® software was modeled and used for the uniaxial compression simulation, which was validated by experiments. Then, the influence of mechanical parameters (Young’s modulus, Poisson’s ratio, cohesion

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单裂隙3d打印岩样变形-开裂力学实验与数值模拟

对地下工程结构的力学响应和变形开裂行为进行分析，有助于高效地提取地能，保证地下工程结构的长期安全。与天然岩心相比，以石英砂为原料的3d打印样品的力学性能相对均匀，可用于定量研究天然缺陷对岩石力学性能的影响。本文制作了具有不同裂纹角度、长度和宽度的单断裂的3d打印样品，并用于单轴压缩试验。采用数字图像相关方法，可视化了单轴压缩试验过程中的应力应变分布，研究了预制裂缝特征(倾角、长度和宽度)对变形破坏过程的影响。建立了ABAQUS软件的扩展有限元法子程序，并将其用于单轴压缩仿真，并通过实验进行了验证。然后分析了力学参数(杨氏模量、泊松比、黏聚力)的影响

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来源期刊

Advances in Geo-Energy Research natural geo-energy (oil, gas, coal geothermal, and gas hydrate)-Geotechnical Engineering and Engineering Geology

CiteScore

12.30

自引率

8.50%

发文量

审稿时长

2~3 weeks

期刊介绍： Advances in Geo-Energy Research is an interdisciplinary and international periodical committed to fostering interaction and multidisciplinary collaboration among scientific communities worldwide, spanning both industry and academia. Our journal serves as a platform for researchers actively engaged in the diverse fields of geo-energy systems, providing an academic medium for the exchange of knowledge and ideas. Join us in advancing the frontiers of geo-energy research through collaboration and shared expertise.