Weibing Cai

Ningxia University

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Yong Li

Shandong University

Ke Gao

Liaoning Technical University

Weishen Zhu

Shandong University

Kai Wang

China University of Mining and Technology

Weiqiu Kong

Shandong University

Lei Yang

PowerChina (China)

Yiguo Xue

Shandong University

Qiangyong Zhang

Shandong University

Shugang Ai

Southern University of Science and Technology

Zhiheng Wang

Jilin University

Cooperative Institutions

Shandong University

Shandong Transportation Research Institute

Chinese Academy of Sciences

China University of Mining and Technology

Research Institute of Petroleum Exploration and Development

Hunan University

Southern University of Science and Technology

Tongji University

Beihang University

Ningxia University

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Crack propagation mechanism in rock-like specimens containing intermittent flaws under shear loading

Theoretical and Applied Fracture Mechanics (2021)

Weibing Cai Yong Li Ke Gao Kai Wang

Coalescence (physics)

Shearing (physics)

Stress field

10.1016/j.tafmec.2021.103187

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Citations (28)

The crack coalescence mode and physical field evolutionary characteristics of a brittle material containing two 3-D parallel embedded flaws

Theoretical and Applied Fracture Mechanics (2020)

Bangxiang Li Song Yu Weishen Zhu Lei Yang Weibing Cai

Coalescence (physics)

Brittleness

10.1016/j.tafmec.2020.102836

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Citations (16)

Experimental and CDEM Analysis on Crack Propagation Mechanism of Rock-Like Material Containing Flaws Under Uniaxial and Biaxial Compression

Yong Li Weishen Zhu Chao Wei Weibing Cai Guannan Wu

<p><strong>Abstract:</strong> Uniaxial and biaxial tests are performed to investigate the evolution mechanism of crack propagation and coalescence through developing newly cement mortar materials with horizontal and inclined pre-existing flaws. Additionally, a new numerical method-CDEM (Continuous discrete element method) is employed to analyze the evolution laws of stress field of crack tips under hydraulic coupling. The results reveal that the maximum principal stress of the wing crack tip gradually decreases with increase of internal water pressure, and the initiation stress, initiation angle and peak strength show decreasing trend. The results of crack propagation and coalescence obtained by numerical simulation is consistent with laboratory results. With the water pressure increases, prior to the occurrence of wing cracks, the coplanar cracks firstly initiate around inclined flaws. Under the coupling action of uniaxial compression and internal water pressure, the lateral pressure would limit the initiation of the wing cracks, while the increasing water pressure weakens the inhibition of lateral pressure on wing cracks.</p>

Coalescence (physics)

Principal stress

Water pressure

Stress field

10.5194/egusphere-egu2020-12195

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Citations (0)

Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme

Computers and Geotechnics (2023)

Weibing Cai Ke Gao Shugang Ai Min Wang Y.T. Feng

10.1016/j.compgeo.2023.105470

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Citations (15)

Crack propagation process and acoustic emission characteristics of rock-like specimens with double parallel flaws under uniaxial compression

Theoretical and Applied Fracture Mechanics (2021)

Zhiheng Wang Yong Li Weibing Cai Weishen Zhu Weiqiu Kong

Acoustic Emission

Micromechanics

10.1016/j.tafmec.2021.102983

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Citations (36)

The Microscopic Mechanism of Crack Evolution in Brittle Material Containing 3-D Embedded Flaw

Rock Mechanics and Rock Engineering (2020)

Bangxiang Li Song Yu Weishen Zhu Weibing Cai Lei Yang

Brittleness

10.1007/s00603-020-02214-z

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Citations (26)

A 2D continuous-discontinuous unified pore-fracture seepage model for hydro-mechanical coupling in the combined finite-discrete element method (FDEM) using node binding scheme

Computers and Geotechnics (2024)

Weibing Cai Ke Gao Yan Qiao Shu-Gang Ai Yu Feng

10.1016/j.compgeo.2024.106517

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Citations (3)

Experimental and numerical investigations on crack propagation characteristics of rock-like specimens with preexisting flaws subjected to combined actions of internal hydraulic pressure and shear force

Archive of Applied Mechanics (2021)

Weiqiu Kong Yong Li Lichao Nie Zhenxing Dong Weibing Cai

Brittleness

Internal pressure

10.1007/s00419-021-02052-7

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Citations (9)

A 2D energy-conserving contact model for the combined finite-discrete element method (FDEM)

Computers and Geotechnics (2023)

Weibing Cai Ke Gao Shugang Ai Sheng Zhi

Contact force

10.1016/j.compgeo.2023.105972

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Citations (4)

Experimental and DEM Analysis on Secondary Crack Types of Rock-Like Material Containing Multiple Flaws Under Uniaxial Compression

Applied Sciences (2019)

Yong Li Weibing Cai Xiaojing Li Zhu Weishen Qiangyong Zhang

To better understand the evolution of crack propagation in brittle rock mass, the particle velocity field evolution on both sides of secondary crack in rock-like materials (cement mortar specimens) with pre-existing parallel double flaws under uniaxial compression is analyzed based on the discrete element theory. By bringing in strain rate tensor, a new technique is proposed for quantifying the failure mechanism of cracks to distinguish the types and mechanical behaviors of secondary cracks between pre-existing parallel flaws. The research results show that the types and mechanical behaviors of secondary cracks are distinct at different axial loading stages and can be directly identified and captured through the presented approach. The relative motion trend between particles determines the types and mechanical behaviors of secondary cracks. Based on particles movement on both sides of secondary cracks between cracks, the velocity fields of particles can be divided into four types to further analyze the causes of different types of cracks. In different axial loading stages, the velocity field types of particles on both sides of cracks are continuously evolving. According to the particle velocity field analysis and the proposed novel way, the types of macroscopic cracks are not directly determined by the types of dominated micro-cracks. Under uniaxial compression, the particles between secondary cracks and pre-existing parallel flaws form a confined compressive member. Under the confinement of lateral particles, secondary cracks appear as shear cracks between pre-existing parallel flaws at the beginning stage of crack initiation.

Brittleness

10.3390/app9091749

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Citations (20)