Article
Engineering, Geological
Chao Wei, Shucai Li, Bo Zhang, Yang Song, Yu Zhang, Xianggang Wang
Summary: This study investigates the influence of fluid pressure and lateral pressure on crack propagation, rock bridge failure mechanism, and rock failure modes through experimental analysis. The results show that under uniaxial compression, fluid pressure and lateral pressure change the failure forms and strength characteristics of rock bridges, promoting the growth of tensile cracks and causing more obvious brittle failure characteristics in the specimen.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Baolin Xiong, Jia Sun, Yunmeng Zhao, Zhuangzhuang Wang, Zhiyuan Wang, Bo Chen
Summary: This study used digital image correlation method and acoustic emission equipment to observe the crack growth process in composite rock strata. The results showed that the strain field dispersion can be quantified using the covariance matrix parameter V, and the crack types can be identified based on the growth rate of V.
Article
Geosciences, Multidisciplinary
Qun Yu, Fang Yu, Dali Yao, Shengji Jin
Summary: This study investigates the failure process and acoustic emissions of jointed rock mass containing a pre-existing hole under stress waves using a three-dimensional numerical model based on microscopic damage mechanics. The results demonstrate the significant effects of transmission energy, joint width, joint angle, and wavelength of stress waves on the failure modes and degrees of the rock.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Computer Science, Interdisciplinary Applications
Zhiliang Wang, Haochen Wang, Jianguo Wang, Nuocheng Tian
Summary: This study compared the performance of the RHT model and the HJC model in numerical simulations of blast-induced cracks in granite, and found that the RHT model is more suitable for simulating cyclic blasting problems.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Geological
Xuhai Tang, Siji Tao, Ping Li, Jonny Rutqvist, Mengsu Hu, Lei Sun
Summary: In this study, the mechanisms of frost cracking as a result of freeze-thaw cycling, confining stress, and the interaction of multiple cracks were investigated using experimental, theoretical, and numerical approaches. The experimental and numerical results showed that frost cracks tend to propagate in the direction of maximum principal stress, and the position and orientation of initial cracks significantly influence the interaction effect between two frost cracks.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Engineering, Geological
Zhitao Zhang
Summary: In this study, numerical simulation was conducted to investigate the crack propagation behavior of rock specimens containing 3-D internal cracks. The effects of different crack distribution forms and crack surface inclination angles were analyzed.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2022)
Article
Engineering, Civil
Hadi Haeri, Vahab Sarfarazi, Mohammad Fatehi Marji
Summary: This study investigated the effects of L-shaped notches on the behavior of distance between two pre-existing cracks in rock-like specimens through experimental and numerical methods. The results showed that the shape and angle of cracks significantly influenced the fracturing pattern and strength of the samples. Additionally, numerical modeling provided insights on the development of shear cracks from nonpersistent joints that may not have been visible based on experimental results alone.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2021)
Article
Engineering, Mechanical
Han Wang, Yongtao Gao, Yu Zhou
Summary: Unfilled cross fissures in natural rocks significantly affect the mechanical behavior of the rock. The angle and length of these fissures influence the strength, elastic modulus, and final crack system morphology of rock-like specimens. Different parameters impact the crack development law and ultimate failure modes of the specimens.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Energy & Fuels
Zhenghe Liu, Shaohua Wang, Hailong Ye, Lusheng Yang, Fan Feng, Haojie Lian, Dong Yang
Summary: The study shows that the inclination angle of pre-cracks affects the fracture initiation pressure and extension length, while a longer pre-crack length reduces the fracture initiation pressure. Additionally, increasing fracturing fluid viscosity significantly increases the crack extension length.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2021)
Article
Mechanics
Mansour Sharafisafa, Zeinab Aliabadian, Faham Tahmasebinia, Luming Shen
Summary: This study investigates the failure patterns of rock-like specimens with pre-existing flaws, utilizing 3D printing technology coupled with digital image correlation (DIC) and bonded particle model (BPM). The presence of filled flaws significantly affects the deformation behavior of the specimens. Different types of flaws lead to various failure modes, with filled specimens showing higher peak loads due to the additional energy required to fracture the filling material.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Mechanics
Zeinab Aliabadian, Mansour Sharafisafa, Faham Tahmasebinia, Luming Shen
Summary: This paper investigates the impact of pre-existing flaws in rocks on crack initiation, propagation, and coalescence, and demonstrates the feasibility of using 3D printing technology in combination with DIC and BPM models to replicate the behavior of natural rocks. It shows that systematic analysis of different flaw configurations can provide comprehensive insights into crack coalescence.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Multidisciplinary
Youjun Ning, Qi Lu, Xinlian Liu
Summary: In this study, the numerical manifold method (NMM) was improved to better simulate rock cracking. The simulations reproduced the crack development path accurately and matched the theoretical and experimental results. It was also found that the number and distance of pre-existing cracks have a significant influence on the strength of the rock.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Computer Science, Interdisciplinary Applications
Luming Zhou, Shu Zhu, Zhende Zhu
Summary: This paper proposes an ordinary state-based peridynamic (OS-PD) model based on the Cosserat continuum to predict the propagation and coalescence of rock cracks. Compared with the classical OS-PD model, the pairwise moment between two material points is also considered in the proposed Cosserat ordinary state-based peridynamic (COS-PD) model. The rotational stiffness and rotation angle are introduced to characterize the microdeformation and microstructure of rock, and the expression of rotational stiffness coefficient is derived. Three numerical cases are presented to compare the performance of OS-PD model and COS-PD model, and the effect of rotational stiffness on crack growth is investigated. The results show that the introduction of pairwise moment accelerates the rock failure process, and the crack propagation type and coalescence mode are more inclined to shear failure with the increase of rotation stiffness coefficient. Compared with experimental results, it is found that the COS-PD model can extend the classical OS-PD model and better capture the evolution process of the rock crack.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Mechanics
Weiqiu Kong, Yong Li, Lichao Nie, Zhenxing Dong, Weibing Cai, Zhiheng Wang, Kai Wang
Summary: This paper investigates the crack propagation mechanism of rock-like specimens with preexisting flaws under the combined actions of internal hydraulic pressure and shear force through laboratory direct shear tests and discrete element theory. The results show that under internal hydraulic pressure, cracks propagate along the horizontal shear direction, leading to the appearance of shear and tensile cracks, ultimately reducing the shear strength of the cement mortar specimens.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Engineering, Mechanical
Xiaohan Li, Zheming Zhu, Meng Wang, Dingjun Xiao, Yun Shu, Shuai Deng
Summary: The existence of cracks in fractured rock masses significantly affects the stability of tunnels under dynamic disturbances. Research on tunnel fracture mechanisms under blasting stress waves with interconnected cracks shows that these cracks have an important influence on the dynamic response of tunnels. The stress distribution and fracture modes around the tunnel are significantly changed due to the existence of interconnected cracks.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Construction & Building Technology
Hadi Haeri, V. Sarfarazi, P. Ebneabbasi, A. Nazari Maram, A. Shahbazian, M. Fatehi Marji, A. R. Mohamadi
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Engineering, Civil
Hadi Haeri, Vahab Sarfarazi, Mohammad Fatehi Marji
Summary: This study investigated the effects of L-shaped notches on the behavior of distance between two pre-existing cracks in rock-like specimens through experimental and numerical methods. The results showed that the shape and angle of cracks significantly influenced the fracturing pattern and strength of the samples. Additionally, numerical modeling provided insights on the development of shear cracks from nonpersistent joints that may not have been visible based on experimental results alone.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2021)
Article
Mechanics
Alireza Bagher Shemirani, Hadi Haeri, Vahab Sarfarazi, Pouyan Ebneabbasi, Mohammad Fatehi Marji
Summary: The interaction between concrete-gypsum interface and internal notch was investigated using experimental and discrete element method. The results showed that the joint direction relative to the loading axis had a significant effect on the failure process, and the tensile strength of the specimens was related to fracture pattern, joint length, and angle.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
Mohammad Davood Yavari, Hossein Ali Lazemi, Hadi Haeri
Summary: The crack propagation process of cubic concrete specimens with single cracks under lateral constraint was studied both experimentally and numerically. Results showed that lateral stress significantly influences the crack propagation mechanism of concrete, leading to mixed-mode crack propagation scenarios involving both tensile and shear cracks under different lateral confining stresses. Additionally, findings suggested that confined stress may effectively influence the process of crack initiation and propagation in pre-cracked concrete specimens under compressive loading conditions.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2021)
Article
Engineering, Civil
Hadi Haeri, Vahab Sarfarazi, Mohammad Fatehi Marji
Summary: The effects of dip angles and thicknesses of bedding layers at the interaction line in between the planes of a normal fault and bedding layers were numerically studied using discrete element modeling techniques. Calibration of the numerical method was done using an inverse modeling approach. The numerical modeling results showed that shear cracks initiated from all of the bedding interfaces and revealed that the minimum shear strength of the model occurred at specific bedding angles.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2021)
Article
Engineering, Civil
Hadi Haeri, Vahab Sarfarazi, Amir Aslan Naderi
Summary: The study found that the non-persistent notch angle has an effect on the shear behavior of the joint's bridge area, and the failure pattern and strength are similar in both experimental testing and numerical simulation methods.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2022)
Article
Engineering, Civil
Hadi Haeri, Vahab Sarfarazi, Mohammad Fatehi Marji
Summary: This study investigated the static and dynamic response of rock engineering models using particle flow code, calibrating PFC2D and simulating uniaxial compression tests. The results showed that the failure pattern was affected by loading rate, while the model strength was influenced by the failure pattern.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2022)
Article
Materials Science, Characterization & Testing
J. Fu, H. Haeri, M. D. Yavari, V Sarfarazi, M. F. Marji, M. Guo
Summary: Pre-cracked cubic concrete specimens were prepared in a lab to study the breaking process of brittle solids using linear elastic fracture mechanics. Experimental methods and numerical analyses using FEM and ABAQUS software were employed to investigate crack propagation mechanisms and ultimate strengths. Comparison of numerical and experimental results validated the proposed method's feasibility.
STRENGTH OF MATERIALS
(2021)
Article
Engineering, Civil
Hadi Haeri, Nader Mirshekari, Vahab Sarfarazi, Mohammad Fatehi Marji
SMART STRUCTURES AND SYSTEMS
(2020)
Article
Computer Science, Interdisciplinary Applications
Dandan Wang, Guang Zhang, Vahab Sarfarazi, Hadi Haeri, A. A. Naderi
COMPUTERS AND CONCRETE
(2020)
Article
Computer Science, Interdisciplinary Applications
Ali Ghamari, Javad Kurdi, Alireza Bagher Shemirani, Hadi Haeri
COMPUTERS AND CONCRETE
(2020)
Article
Construction & Building Technology
Hadi Haeri, Vahab Sarfarazi, Zheming Zhu, Hamid Reza Nejati
ADVANCES IN CONCRETE CONSTRUCTION
(2019)
Article
Engineering, Civil
V. Sarfarazi, Hadi Haeri, Salman Safavi, Mohammad Fatehi Marji, Zheming Zhu
STRUCTURAL ENGINEERING AND MECHANICS
(2019)
Article
Engineering, Civil
Hadi Haeri, Vahab Sarfarazi, Zheming Zhu, Mohammad Fatehi Marji
SMART STRUCTURES AND SYSTEMS
(2019)
Article
Engineering, Civil
Hadi Haeri, Vahab Sarfarazi, Mohammad Fatehi Marji
SMART STRUCTURES AND SYSTEMS
(2020)
