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  1. No Access

    Article

    Study on the Effect of Bedding Plane and Loading Style on Fracture Process Zone in Coal

    In this study, we conduct the single-edge notched beam (SENB) test to study the influence of bedding planes and loading style on the fracture properties and acoustic emission (AE) characteristic parameters in ...

    Zaiyong Wang, Weiguo Liang, Haojie Lian, Yuedu Chen… in Rock Mechanics and Rock Engineering (2024)

  2. No Access

    Article

    Uncertainty quantification of mechanical property of piezoelectric materials based on isogeometric stochastic FEM with generalized nth-order perturbation

    This paper proposes a novel generalized nth-order perturbation isogeometric finite-element method (GNP-IGA-FEM) for uncertainty quantification of mechanical properties of piezoelectric materials. In this method, ...

    Leilei Chen, Haozhi Li, Yingying Guo, Pan Chen… in Engineering with Computers (2024)

  3. No Access

    Article

    Experimental Study on the Fracture Process Zones and Fracture Characteristics of Coal and Rocks in Coal Beds

    In this work, the physical, mechanical, and fracturing properties of three different types of rock (shale, sandstone, and coal) are studied through three-point bending tests. The fracturing characteristics are...

    Zaiyong Wang, Haojie Lian, Weiguo Liang, Pengfei Wu… in Rock Mechanics and Rock Engineering (2024)

  4. No Access

    Article

    Propagation mechanism of the hydraulic fracture in layered-fractured-plastic formations

    The pore pressure cohesive element was used to simulate the hydraulic fracturing process in layered-fractured-plastic formations. The effects of formation modulus, natural fractures, and formation plasticity o...

    Dijie Zhu, Lingfan Zhang, **aoxia Song, Haojie Lian… in International Journal of Fracture (2023)

  5. No Access

    Article

    Experimental Study of Supercritical CO2 Fracturing Across Coal–Rock Interfaces

    Indirect fracturing with supercritical carbon dioxide (CO2) is a promising technology of coalbed methane exploitation in soft and low-permeability coal seams. The key to its success is to ensure the cracks produc...

    Wei He, Haojie Lian, Weiguo Liang, Pengfei Wu… in Rock Mechanics and Rock Engineering (2023)

  6. No Access

    Article

    Modeling pressurized fracture propagation with the isogeometric BEM

    This paper simulates the propagation of hydraulic fractures under constant fluid pressure using the isogeometric analysis based on boundary element methods (BEM) i.e. the so called isogeomtric BEM. Due to the ...

    Leilei Chen, Zhongwang Wang, Xuan Peng… in Geomechanics and Geophysics for Geo-Energy… (2021)

  7. No Access

    Article

    Uncertainty quantification of spatially uncorrelated loads with a reduced-order stochastic isogeometric method

    This work models spatially uncorrelated (independent) load uncertainty and develops a reduced-order Monte Carlo stochastic isogeometric method to quantify the effect of the load uncertainty on the structural r...

    Chensen Ding, Kumar K. Tamma, Haojie Lian, Yanjun Ding… in Computational Mechanics (2021)

  8. No Access

    Article

    Experimental study on the effects of pre-cracks, fracturing fluid, and rock mechanical characteristics on directional hydraulic fracturing with axial pre-cracks

    Directional hydraulic fracturing by prefabricating longitudinal (axial) cracks on the sides of boreholes is an effective technique to control hard roof and ensure mining safety. In the present work, a true tri...

    Zhenghe Liu, Shaohua Wang, Hailong Ye… in Geomechanics and Geophysics for Geo-Energy… (2021)

  9. No Access

    Article

    The shape optimization of underground caverns based on strain energy criterion via explicit interface tracking methods

    We applied a shape optimization algorithm based on an explicit interface tracking method to optimize underground caverns. The objective chosen in the present work is to minimize the strain energy. The algorith...

    Haojie Lian, Pengfei Wu in International Journal of Advances in Engin… (2020)

  10. Article

    Open Access

    Fracturing in coals with different fluids: an experimental comparison between water, liquid CO2, and supercritical CO2

    The present work conducted laboratory experiments of fracturing in fat coals, anthracites, and mudstones. Three different fluids were selected as the fracturing fluids, including water, liquid CO2 (L-CO2), and su...

    Jianfeng Yang, Haojie Lian, Li Li in Scientific Reports (2020)

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  11. No Access

    Article

    Effects of Confining Stresses, Pre-crack Inclination Angles and Injection Rates: Observations from Large-Scale True Triaxial and Hydraulic Fracturing Tests in Laboratory

    Zhenghe Liu, **aokai Ren, **ao Lin, Haojie Lian… in Rock Mechanics and Rock Engineering (2020)

  12. No Access

    Chapter

    Modelling Hydraulic Fracturing in Coals

    Hydraulic fracturing is regarded as a promising technology in exploiting unconventional natural gas. Compared to the enormous success achieved in shale-gas exploitation, the application of hydraulic fracturing...

    Weiguo Liang, Haojie Lian, Jianfeng Yang in Modelling Rock Fracturing Processes (2020)

  13. No Access

    Article

    Combined shape and topology optimization for minimization of maximal von Mises stress

    This work shows that a combined shape and topology optimization method can produce optimal 2D designs with minimal stress subject to a volume constraint. The method represents the surface explicitly and discre...

    Haojie Lian, Asger N. Christiansen… in Structural and Multidisciplinary Optimizat… (2017)