Elastic–Plastic Fracture Propagation Modeling in Rock Fracturing via Punch Through Shear Test

Jarrahi, Miad; Blöcher, Guido; Kluge, Christian; Holländer, Hartmut

doi:10.1007/s00603-021-02457-4

Cited by 6 publications

(1 citation statement)

References 41 publications

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“…The amount of plastic deformation can be expressed by the value of the brittleness index modified (BIM) [35,36]:…”

Section: Energy Mechanism Under Uniaxial Compressionmentioning

confidence: 99%

Degradation Characteristics and Mechanism of Black Sandy Dolomite with Fluid Added in a Mechanical Test

Liao,

Xu,

Ling

et al. 2023

Geofluids

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Sandy dolomite, being a soluble rock, is prone to dissolution and erosion caused by groundwater, leading to the formation of underground caves and fractures. This may result in geological disasters such as ground subsidence and collapse. In this paper, the changes and mechanical properties of black sandy dolomite after hydrochemistry are studied. A semi-immersion test with different concentrations of iron sulfate solution was carried out to simulate the water-rock interaction in different water environments. After that, scanning electron microscope (SEM) results could reflect the dissolution and pore development of rock by the effect of water-rock interaction from the microscopic. Water-rock interaction enlarges cracks in rocks and dissolves pyrite, carbonate minerals, and other components, reducing the cementation between particles. The change in the mechanical properties of black sandy dolomite under water-rock chemical interaction was revealed by uniaxial compression test. The mechanical properties of the samples exhibit varying degrees of deterioration, with strain increased ranging from 4.96 to 29.58%. The brittleness index modified (BIM) values for each sample ranged from 5.20 to 6.20%, all of which are larger than 4.70% in the natural state.

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“…The amount of plastic deformation can be expressed by the value of the brittleness index modified (BIM) [35,36]:…”

Section: Energy Mechanism Under Uniaxial Compressionmentioning

confidence: 99%

Degradation Characteristics and Mechanism of Black Sandy Dolomite with Fluid Added in a Mechanical Test

Liao,

Xu,

Ling

et al. 2023

Geofluids

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Simulation of Shear and Tensile Fractures Using Ductile Phase Field Modelling with the Calibration of P Wave Velocity Measurement and Moment Tensor Inversion

Li,

Si,

et al. 2024

Rock Mech Rock Eng

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The appropriate understanding and formulation of rock discontinuities via FEM is still challenging for rock engineering, as continuous algorithms cannot handle the discontinuities in rock mass. Also, different failure modes of rock samples, containing tensile and shear failure, need to be computed separately. In this study, a novel double-phase field damage model was introduced with two independent phase field damage variables. The construction of the proposed model follows the thermodynamics framework from the overall Helmholtz free energy, with elastic, plastic and surface damage components. The proposed model is calibrated via traditional damage variables, based on ultrasonic wave velocity measurement and acoustic emission monitoring, and both show great consistency between simulation results and laboratory observations. Then the double-phase field damage model is applied to COMSOL software to simulate microcrack propagation in a pre-fractured rock sample. Both lateral and wing cracks are observed in this study, manifested as shear- and tensile-dominated cracks. We also observed different microcracking mechanisms in the proposed numerical models, such as tensile and shear cracking, the influence of plastic strain and the percolation between tensile and shear microcracks. Overall, this study provides valuable insights into the mechanics of microcracking in rocks, and the proposed model shows promising results in simulating crack propagation.

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Study on shear test and shear displacement of frozen joints with different opening degrees

Han

Shen

2022

Nat Hazards

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Elastic–Plastic Fracture Propagation Modeling in Rock Fracturing via Punch Through Shear Test

Cited by 6 publications

References 41 publications

Degradation Characteristics and Mechanism of Black Sandy Dolomite with Fluid Added in a Mechanical Test

Degradation Characteristics and Mechanism of Black Sandy Dolomite with Fluid Added in a Mechanical Test

Simulation of Shear and Tensile Fractures Using Ductile Phase Field Modelling with the Calibration of P Wave Velocity Measurement and Moment Tensor Inversion

Study on shear test and shear displacement of frozen joints with different opening degrees

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