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Investigating Mechanical Characteristics of Rocks Under Freeze–Thaw Cycles Using Grain-Based Model
https://orcid.org/http://orcid.org/0000-0001-5382-1003
Based on the discrete element method (DEM), a water-contained grain-based model (GBM) is developed in this study to evaluate the effects of freeze–thaw cycles (FTCs) on the mechanical characteristics of the rock. A set of freeze–thaw and uniaxial compression tests is carried out to explore the impact of micro damage caused by FTCs on the mechanical prosperities of rock samples. By monitoring the development and distribution of micro-cracks during freeze–thaw test and uniaxial compression test, the damage mechanism of FTCs is revealed from a microscopic perspective, which shows that FTCs deteriorate the strength and brittleness parameters as exponential functions. The parametric analysis is carried out to explore the influence of porosity and mineral components on the mechanical behaviors of rock against freeze–thaw and uniaxial loadings. Based on the parametric analysis results, it is found that UCS, Young’s modulus, and total strain energy at peak stress decrease with the increase of porosity and clay content, which emphasizes the contributions of porosity and mineral components on the mechanical properties of rock samples. It is proved that the water-contained grain-based model developed in this study can capture the damage caused by FTCs on the mechanical performance of rock from a microscopic perspective, which provides novel perspectives on the phenomenon of rock degradation in response to fluctuations in temperature.
Water-contained grain-based model evaluates the effects of freeze-thaw cycles on the mechanical characteristics of rock.
The development and distribution of micro-cracks reflects the damage of freeze-thaw cycles from a micro perspective.
Porosity and mineral components influence the mechanical properties of rock samples after freeze-thaw cycles.
Investigating Mechanical Characteristics of Rocks Under Freeze–Thaw Cycles Using Grain-Based Model
https://orcid.org/http://orcid.org/0000-0001-5382-1003
Based on the discrete element method (DEM), a water-contained grain-based model (GBM) is developed in this study to evaluate the effects of freeze–thaw cycles (FTCs) on the mechanical characteristics of the rock. A set of freeze–thaw and uniaxial compression tests is carried out to explore the impact of micro damage caused by FTCs on the mechanical prosperities of rock samples. By monitoring the development and distribution of micro-cracks during freeze–thaw test and uniaxial compression test, the damage mechanism of FTCs is revealed from a microscopic perspective, which shows that FTCs deteriorate the strength and brittleness parameters as exponential functions. The parametric analysis is carried out to explore the influence of porosity and mineral components on the mechanical behaviors of rock against freeze–thaw and uniaxial loadings. Based on the parametric analysis results, it is found that UCS, Young’s modulus, and total strain energy at peak stress decrease with the increase of porosity and clay content, which emphasizes the contributions of porosity and mineral components on the mechanical properties of rock samples. It is proved that the water-contained grain-based model developed in this study can capture the damage caused by FTCs on the mechanical performance of rock from a microscopic perspective, which provides novel perspectives on the phenomenon of rock degradation in response to fluctuations in temperature.
Water-contained grain-based model evaluates the effects of freeze-thaw cycles on the mechanical characteristics of rock.
The development and distribution of micro-cracks reflects the damage of freeze-thaw cycles from a micro perspective.
Porosity and mineral components influence the mechanical properties of rock samples after freeze-thaw cycles.
Investigating Mechanical Characteristics of Rocks Under Freeze–Thaw Cycles Using Grain-Based Model
https://orcid.org/http://orcid.org/0000-0001-5382-1003
Based on the discrete element method (DEM), a water-contained grain-based model (GBM) is developed in this study to evaluate the effects of freeze–thaw cycles (FTCs) on the mechanical characteristics of the rock. A set of freeze–thaw and uniaxial compression tests is carried out to explore the impact of micro damage caused by FTCs on the mechanical prosperities of rock samples. By monitoring the development and distribution of micro-cracks during freeze–thaw test and uniaxial compression test, the damage mechanism of FTCs is revealed from a microscopic perspective, which shows that FTCs deteriorate the strength and brittleness parameters as exponential functions. The parametric analysis is carried out to explore the influence of porosity and mineral components on the mechanical behaviors of rock against freeze–thaw and uniaxial loadings. Based on the parametric analysis results, it is found that UCS, Young’s modulus, and total strain energy at peak stress decrease with the increase of porosity and clay content, which emphasizes the contributions of porosity and mineral components on the mechanical properties of rock samples. It is proved that the water-contained grain-based model developed in this study can capture the damage caused by FTCs on the mechanical performance of rock from a microscopic perspective, which provides novel perspectives on the phenomenon of rock degradation in response to fluctuations in temperature.
Water-contained grain-based model evaluates the effects of freeze-thaw cycles on the mechanical characteristics of rock.
The development and distribution of micro-cracks reflects the damage of freeze-thaw cycles from a micro perspective.
Porosity and mineral components influence the mechanical properties of rock samples after freeze-thaw cycles.
Investigating Mechanical Characteristics of Rocks Under Freeze–Thaw Cycles Using Grain-Based Model
Rock Mech Rock Eng
Huang, Chenchen (author) / Zhu, Cheng (author) / Ma, Yifei (author)
Rock Mechanics and Rock Engineering ; 58 ; 603-622
2025-01-01
20 pages
Article (Journal)
Electronic Resource
English
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