Acoustic Emission (AE) Based Damage Quantification and Its Relation with AE-Based Micromechanical Coupled Damage Plasticity Model for Intact Rocks

Chajed, Shubham; Singh, Aditya

doi:10.1007/s00603-023-03686-5

Cited by 10 publications

(2 citation statements)

References 60 publications

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“…In the field of coupled thermal-hydrological-mechanical-chemical (THMC) processes, the understanding of material behavior at both the microscopic and macroscopic level plays a crucial role in the accuracy of numerical simulations [23]. To bridge the gap between laboratory-scale experiments and real-field observations, it is essential to take into account the intrinsic heterogeneities of geological materials.…”

Section: Methodsmentioning

confidence: 99%

Coupled Processes at Micro- and Macroscopic Levels for Long-Term Performance Assessment Studies of Nuclear Waste Repositories

Shao,

Radeisen,

Hesser

et al. 2024

Minerals

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Performance assessment of nuclear waste repositories requires state-of-the-art knowledge of radionuclide transport properties. Additionally, the short-term development under thermal pulses and the long-term development of the near field—due to influences such as gas generation—must be evaluated. Key thermal-hydro-mechanical-chemical processes are strongly coupled on different spatial and temporal scales. To understand these coupling mechanisms, numerous material models and numerical codes have been developed. However, the existing constitutive approaches—which have been adapted to describe small-scale laboratory experiments and validated against real-scale field observations—are often unable to capture long-term material behavior with sufficient precision. To build the confidence, a more comprehensive understanding of the system at micro- and macroscopic scales is required. Most observed macroscopic processes result from microscopic changes in the crystal structure and/or crystalline aggregates, as well as changes in material properties under the influence of various factors. To characterize these physical fields in crystals, microscopic investigations, such as visualization, or geophysical methods are introduced to verify the understanding at the microscale. Two cases are demonstrated for the presented concept using microscale information: one deals with the mechanically and thermally driven migration of fluid inclusions in rock salt, the other with dilatancy-controlled gas transport in water-saturated clay material.

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Section: Methodsmentioning

confidence: 99%

Coupled Processes at Micro- and Macroscopic Levels for Long-Term Performance Assessment Studies of Nuclear Waste Repositories

Shao,

Radeisen,

Hesser

et al. 2024

Minerals

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“…Digital image correlation (DIC) [22][23][24][25][26][27][28] and the acoustic emission (AE) technique [29][30][31][32][33][34][35] are widely used monitoring methods in rock mechanics experiments. In experimental research on rock deformation localization, accurate measurement of the deformation field in the deformation localization stage is required for in-depth study.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Rock Deformation Localization Using Digital Image Correlation and Acoustic Emission

Xing,

Zhu,

Song

2024

Applied Sciences

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In this study, the digital image correlation (DIC) method and acoustic emission (AE) technology were combined to study the evolution of rock deformation localization in detail. The second-order spatial–temporal subset DIC (STS-DIC) algorithm was proposed and used for measuring strongly heterogeneous deformation fields of red sandstone specimens under uniaxial compression. The evolution of the deformation field was analyzed with a focus on the deformation localization stage. The length and width of the deformation localization band (DLB) were measured, and the relationships between the relative sliding rate of the DLB, the relative opening rate of the DLB, and the AE counts were identified. Deformation localization was found to result from the rapid evolution of the strain concentration before the peak stress. The complete development of the DLB is an inducing factor for catastrophic rock failure, and the failure modes of the rock specimens were consistent with the final state of the DLB. A good correlation was identified between the AE counts and the relative displacement rate of the DLB, and the sliding rate was found to have a significant influence on the AE counts.

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AE Event Count-Based Damage Evolution and Its Application in Micromechanical Damage Plasticity Model

Chajed,

Singh

2024

Lecture Notes in Civil Engineering

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Acoustic Emission (AE) Based Damage Quantification and Its Relation with AE-Based Micromechanical Coupled Damage Plasticity Model for Intact Rocks

Cited by 10 publications

References 60 publications

Coupled Processes at Micro- and Macroscopic Levels for Long-Term Performance Assessment Studies of Nuclear Waste Repositories

Coupled Processes at Micro- and Macroscopic Levels for Long-Term Performance Assessment Studies of Nuclear Waste Repositories

Experimental Study on Rock Deformation Localization Using Digital Image Correlation and Acoustic Emission

AE Event Count-Based Damage Evolution and Its Application in Micromechanical Damage Plasticity Model

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