☆ 4.7 Article

Effect of size and anisotropy on mode I fracture toughness of coal

THEORETICAL AND APPLIED FRACTURE MECHANICS (2024)

相关参考文献

注意：仅列出部分参考文献，下载原文获取全部文献信息。

Article Mining & Mineral Processing

Size effect of fracture characteristics for anisotropic quasi-brittle geomaterials

Cunbao Li et al.

Summary: In this study, the anisotropic features of geomaterials were analyzed through size effect fracture experiments. The results showed that the nominal strength and apparent fracture toughness were affected by the bedding plane inclination angle. The effective fracture energy and FPZ size varied within two complex stages.

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY (2023)

添加到收藏夹

Article Engineering, Mechanical

Numerical investigation on hydraulic fracture propagation and multi-perforation fracturing for horizontal well in Longmaxi shale reservoir

Peng-Fei Yin et al.

Summary: Understanding the distribution characteristics of hydraulic fracture networks in shale reservoirs is crucial for optimizing fracturing design and production estimation. By improving the fluid-solid coupling model and studying key factors affecting fracture propagation, a numerical model is established to analyze the distribution characteristics of the fracture network in staged fracturing. The results show that coalescence of interbedding fractures plays a significant role in forming an effective fracture network for shale gas exploitation.

THEORETICAL AND APPLIED FRACTURE MECHANICS (2023)

添加到收藏夹

Article Engineering, Geological

The Influence of Bedding Planes on Tensile Fracture Propagation in Shale and Tight Sandstone

Wei Zhou et al.

Summary: In this study, a double torsion experiment was conducted to simulate the propagation of tensile fractures during hydraulic fracturing. The influence of bedding planes on fracture toughness, morphology, and propagation rate in shale and tight sandstone was investigated. The results indicate that the angle between bedding and pre-cut plane, as well as the difference in micromechanical properties of adjacent bedding planes, are crucial in determining whether hydraulic fractures can penetrate or spread along a bedding plane.

ROCK MECHANICS AND ROCK ENGINEERING (2022)

添加到收藏夹

Article Engineering, Environmental

Study on the effect of injection rate on the fracture initiation and extension in cement-sand slurry specimens

Shanwei Hu et al.

Summary: This paper investigates the influence of different fracturing fluid injection rates on various fracturing parameters and fracture shapes of cement-sand slurry specimens. The experimental results demonstrate that the fracture initiation time, initiation pressure, and fracture shape change with increasing injection rate. The combination of acoustic emission and CT technology provides a more scientific approach to studying hydraulic fracturing and fracture expansion.

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2022)

添加到收藏夹

Article Engineering, Mechanical

Experimental study on anisotropic fracture characteristics of coal using notched semi-circular bend specimen

Wei Wang et al.

Summary: This study investigates the anisotropic fracture characteristics of coal by conducting physical tests on semi-circular bend specimens with different pre-crack inclinations and bedding orientations. The results show that the bedding orientation and pre-crack inclination jointly affect the fracture mode and resistance of coal specimens, with mode I fracture dominating the fracture onset. Numerical simulations are used to analyze stress distributions near the pre-crack tip and to calibrate crack geometry factors. The morphology of fracture surfaces is drawn based on scanning data, and the joint roughness coefficients of the profiles are calculated. Comparing the differences among these coefficients can quantitatively characterize anisotropic crack growth in coal.

THEORETICAL AND APPLIED FRACTURE MECHANICS (2022)

添加到收藏夹

Article Mechanics

Characterization of anisotropic mode II fracture behaviors of a typical layered rock combining AE and DIC techniques

Z. D. Fan et al.

Summary: The anisotropy of mode II fracture in layered rocks varies significantly with different bedding angles, and the crack propagation resistance cannot be fully characterized by fracture toughness. Acoustic emission monitoring reveals noticeable anisotropies in the threshold values of mode II stress intensity factor and the b value results indicate different fracture characteristics under different conditions.

ENGINEERING FRACTURE MECHANICS (2022)

添加到收藏夹

Article Engineering, Geological

A Size-Dependent Bonded-Particle Model for Transversely Isotropic Rock and its Application in Studying the Size Effect of Shale

Yun Zhao et al.

Summary: This study proposes a new bonded-particle model for simulating the size effect and anisotropy of transversely isotropic rocks. By progressively introducing the rock matrix, bedding planes, and cracks, the model successfully demonstrates the effects of size and anisotropy. The results show that cracks have a significant influence on size effect, while bedding planes play a pronounced role in anisotropy.

GEOTECHNICAL AND GEOLOGICAL ENGINEERING (2022)

添加到收藏夹

Article Engineering, Geological

Prediction of Mode I Fracture Toughness of Shale Specimens by Different Fracture Theories Considering Size Effect

Qin Xie et al.

Summary: This study investigates the difference between the maximum tangential stress fracture criterion and the size effect law model in predicting the apparent fracture toughness of shale, through mode I fracture tests on shale specimens with different sizes. The effect of specimen size and geometry on fracture toughness and the selection of fracture criterion on the prediction of inherent fracture toughness were also studied. The results show that fracture toughness increases with specimen size, and the improved maximum tangential stress criterion provides the most accurate prediction of fracture toughness for different sized shale specimens.

ROCK MECHANICS AND ROCK ENGINEERING (2022)

添加到收藏夹

Article Mechanics

Experimental study on development characteristics and size effect of rock fracture process zone

Sheng Zhang et al.

Summary: The investigation on rock fracture process zone (FPZ) using SCB sandstone specimens of different sizes showed a three-stage crack opening mode and accelerated FPZ development as load increased. The FPZ length at peak is approximately 2-2.5 times the width for specimens of different sizes.

ENGINEERING FRACTURE MECHANICS (2021)

添加到收藏夹

Article Engineering, Geological

Influence of Bedding Planes on Mode I and Mixed-Mode (I-II) Dynamic Fracture Toughness of Coal: Analysis of Experiments

Wei Wang et al.

Summary: Bedding planes significantly influence the effective dynamic fracture toughness and crack propagation characteristics of coal, with decreasing DFT and crack propagation velocity as the bedding-plane angles increase. The crack initiation direction is affected by bedding planes, and the crack propagation path is jointly determined by the direction of maximum principal stress and bedding planes. In pure mode I, crack propagation velocities increase with the increase of bedding-plane angles, while in mixed-mode I-II, the largest velocity occurs at a bedding-plane angle of 45 degrees, with loading velocities peaking at this angle before decreasing rapidly.

ROCK MECHANICS AND ROCK ENGINEERING (2021)

添加到收藏夹

Article Energy & Fuels

Prediction of fracture initiation pressure in multiple failure hydraulic fracturing modes: Three-dimensional stress model considering borehole deformation

Jianyu Zhong et al.

Summary: A new model for predicting the fracture initiation pressure in hydraulic fracturing under a three-dimensional stress state was established in this study, which improved accuracy by 364.4% compared to classical theories. Eleven fracture initiation failure modes for coal seam hydraulic fracturing were proposed, with field test results validating the theoretical model with a maximum error of 5.5%. The study provides more precise guidance for hydraulic fracturing projects.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2021)

添加到收藏夹

Article Engineering, Geological

Introduction of a Scaling Factor for Fracture Toughness Measurement of Rocks Using the Semi-circular Bend Test

Saeid Ghouli et al.

Summary: This article discusses the scale dependence of mode I fracture toughness of rocks measured via the SCB test, and experimental results show that the theoretical model's predicted size effects are in good agreement with experimental data.

ROCK MECHANICS AND ROCK ENGINEERING (2021)

添加到收藏夹

Article Mechanics

Effects of bedding planes on the fracture characteristics of coal under dynamic loading

Wei Wang et al.

Summary: Investigations have shown that the fracture load and dynamic initiation fracture toughness of coal semi-circular bend specimens decrease with an increase in bedding-plane angle. The crack propagation direction is jointly controlled by the maximum principal stress and bedding planes.

ENGINEERING FRACTURE MECHANICS (2021)

添加到收藏夹

Article Engineering, Geological

Size Effect and Anisotropy in a Transversely Isotropic Rock Under Compressive Conditions

Kaihui Li et al.

Summary: A series of compression tests were conducted on slate samples with different diameters to investigate the size effect and anisotropy in transversely isotropic rock. Results showed that only the Young's modulus parallel to the isotropic plane is size-dependent, and two size-dependent failure criteria were proposed for practical engineering applications. This research provides insights into mechanical parameters and failure criteria for transversely isotropic rocks.

ROCK MECHANICS AND ROCK ENGINEERING (2021)

添加到收藏夹

Article Mechanics

Scaling effects on notch fracture toughness of graphite specimens under mode I loading

A. R. Torabi et al.

ENGINEERING FRACTURE MECHANICS (2020)

添加到收藏夹

Article Mechanics

Mode I fracture growth in anisotropic rocks: Theory and experiment

Morteza Nejati et al.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2020)

添加到收藏夹

Article Engineering, Geological

Experimental and Numerical Study of the Influence of Prefabricated Crack Width on the Fracture Toughness of NSCB Specimens

Sheng Zhang et al.

ROCK MECHANICS AND ROCK ENGINEERING (2020)

添加到收藏夹

Article Engineering, Mechanical

Crack tip asymptotic field and K-dominant region for anisotropic semicircular bend specimen

Morteza Nejati et al.

THEORETICAL AND APPLIED FRACTURE MECHANICS (2020)

添加到收藏夹

Article Mechanics

Induced anisotropy in the fracturing behavior of 3D printed parts analyzed by the size effect method

Anar Nurizada et al.

ENGINEERING FRACTURE MECHANICS (2020)

添加到收藏夹

Article Materials Science, Multidisciplinary

Size effect on branched sideways cracks in orthotropic fiber composites

Abdullah Donmez et al.

INTERNATIONAL JOURNAL OF FRACTURE (2020)

添加到收藏夹

Article Engineering, Geological

Size Effect Analysis for the Characterization of Marcellus Shale Quasi-brittle Fracture Properties

Weixin Li et al.

ROCK MECHANICS AND ROCK ENGINEERING (2019)

添加到收藏夹

Article Mechanics

Modified semi-circular bend test to determine the fracture toughness of anisotropic rocks

Morteza Nejati et al.

ENGINEERING FRACTURE MECHANICS (2019)

添加到收藏夹

Article Engineering, Geological

Failure, crack initiation and the tensile strength of transversely isotropic rock using the Brazilian test

Zeinab Aliabadian et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2019)

添加到收藏夹

Article Engineering, Geological

Multibody failure criterion for the four-dimensional lattice spring model

Gao-Feng Zhao et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2019)

添加到收藏夹

Article Mechanics

Experimental study of the dynamic fracture toughness of anisotropic black shale using notched semi-circular bend specimens

Xiaoshan Shi et al.

ENGINEERING FRACTURE MECHANICS (2019)

添加到收藏夹

Review Energy & Fuels

Directional distance prediction model of slotting-directional hydraulic fracturing (SDHF) for coalbed methane (CBM) extraction

Zhaolong Ge et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2019)

添加到收藏夹

Article Engineering, Geological

DEM Modeling of Interaction Between the Propagating Fracture and Multiple Pre-existing Cemented Discontinuities in Shale

Zhina Liu et al.

ROCK MECHANICS AND ROCK ENGINEERING (2019)

添加到收藏夹

Article Mechanics

Discrete elements and size effects

Huai-Zhong Liu et al.

ENGINEERING FRACTURE MECHANICS (2018)

添加到收藏夹

Article Energy & Fuels

Scale effects and strength anisotropy in coal

Honghua Song et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2018)

添加到收藏夹

Article Mechanics

On the link between fracture toughness, tensile strength, and fracture process zone in anisotropic rocks

Nathan Dutler et al.

ENGINEERING FRACTURE MECHANICS (2018)

添加到收藏夹

Article Engineering, Geological

Anisotropic elastic, strength, and fracture properties of Marcellus shale

Zhefei Jin et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2018)

添加到收藏夹

Article Geochemistry & Geophysics

Fracture Properties of Nash Point Shale as a Function of Orientation to Bedding

Nathaniel D. Forbes Inskip et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2018)

添加到收藏夹

Article Materials Science, Multidisciplinary

Scaling of the fracture process zone in rock

Ali Tarokh et al.

INTERNATIONAL JOURNAL OF FRACTURE (2017)

添加到收藏夹

Article Mechanics

Study of the dynamic fracture characteristics of coal with a bedding structure based on the NSCB impact test

Yanbing Wang et al.

ENGINEERING FRACTURE MECHANICS (2017)

添加到收藏夹

Article Mechanics

Effects of loading rate and bedding on the dynamic fracture toughness of coal: Laboratory experiments

Yixin Zhao et al.

ENGINEERING FRACTURE MECHANICS (2017)

添加到收藏夹

Article Engineering, Multidisciplinary

Developing a four-dimensional lattice spring model for mechanical responses of solids

Gao-Feng Zhao

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING (2017)

添加到收藏夹

Article Chemistry, Physical

Size effects on mixed-mode fracture behavior of polygranular graphite

M. R. Ayatollahi et al.

CARBON (2016)

添加到收藏夹

Article Engineering, Multidisciplinary

Numerical study of the semi-circular bend dynamic fracture toughness test using discrete element models

Zhao GaoFeng et al.

SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2015)

添加到收藏夹

Article Geochemistry & Geophysics

The interaction of propagating opening mode fractures with preexisting discontinuities in shale

Hunjoo P. Lee et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2015)

添加到收藏夹

Article Engineering, Geological

ISRM-Suggested Method for Determining the Mode I Static Fracture Toughness Using Semi-Circular Bend Specimen

M. D. Kuruppu et al.

ROCK MECHANICS AND ROCK ENGINEERING (2014)

添加到收藏夹

Article Engineering, Geological

ISRM Suggested Method for the Needle Penetration Test

Resat Ulusay et al.

ROCK MECHANICS AND ROCK ENGINEERING (2014)

添加到收藏夹

Article Engineering, Geological

Size and Geometry Effects on Rock Fracture Toughness: Mode I Fracture

M. R. Ayatollahi et al.

ROCK MECHANICS AND ROCK ENGINEERING (2014)

添加到收藏夹

Article Mechanics

Size effects in mode II brittle fracture of rocks

M. R. Ayatollahi et al.

ENGINEERING FRACTURE MECHANICS (2013)

添加到收藏夹

Article Engineering, Geological

Laboratory measurements of the rate dependence of the fracture toughness anisotropy of Barre granite

F. Dai et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2013)

添加到收藏夹

Article Engineering, Geological

Static and Dynamic Flexural Strength Anisotropy of Barre Granite

F. Dai et al.

ROCK MECHANICS AND ROCK ENGINEERING (2013)

添加到收藏夹

Article Mechanics

Size effects on fracture toughness of quasi-brittle materials - A new approach

M. R. Ayatollahi et al.

ENGINEERING FRACTURE MECHANICS (2012)

添加到收藏夹

Article Engineering, Geological

Study of scale effect on intact rock strength using particle flow modeling

Qi Zhang et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2011)

添加到收藏夹

Article Engineering, Geological

The Effect of Specimen Size on Strength and Other Properties in Laboratory Testing of Rock and Rock-Like Cementitious Brittle Materials

William J. Darlington et al.

ROCK MECHANICS AND ROCK ENGINEERING (2011)

添加到收藏夹

Article Engineering, Mechanical

Mechanism behind the Size Effect Phenomenon

Xiaozhi Hu et al.

JOURNAL OF ENGINEERING MECHANICS-ASCE (2010)

添加到收藏夹

Article Construction & Building Technology

Numerical fracture analysis on the specimen size dependency of asphalt concrete using a cohesive softening model

Hyunwook Kim et al.

CONSTRUCTION AND BUILDING MATERIALS (2009)

添加到收藏夹

Article Materials Science, Multidisciplinary

Size effect and quasi-brittle fracture: the role of FPZ

Xiaozhi Hu et al.

INTERNATIONAL JOURNAL OF FRACTURE (2008)

添加到收藏夹

Article Energy & Fuels

Laboratory measurement and interpretation of the fracture toughness of formation rocks at great depth

M Chen et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2004)

添加到收藏夹

Review Geochemistry & Geophysics

Scaling of fracture systems in geological media

E Bonnet et al.

REVIEWS OF GEOPHYSICS (2001)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.