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Article
Engineering, Geological
J. G. Gutierrez-Ch et al.
Summary: Understanding rock creep behavior is crucial for the long-term strength and safety of geotechnical designs. This article discusses the limitations of existing creep models and introduces new models that incorporate an associated viscoplastic flow rule. Additionally, it proposes the use of the Rate Process Theory to study soil/rock creep behavior. The study demonstrates the suitability of the Discrete Element Method with Rate Process Theory implementation to simulate Rock Shear Creep while considering the effects of shear stress and normal stress.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Geological
Wenbo Liu et al.
Summary: A unified creep constitutive model based on the kinetic energy theorem, Perzyna viscoplastic theory, and the Nishihara model is established to describe the early-stage creep, stable creep, and accelerated creep. The model reveals that the energy consumption and creep damage mainly result from the internal energy changes of geotechnical materials during creep loading.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Toungainbo Cedric Kamdem et al.
Summary: In this work, a new variable fractional order rheological model is proposed to accurately estimate and model the creep behavior of rock. The study shows that the mechanical behavior of the rock softens faster at high temperature and stress levels, and hardens in the opposite case. The physical meaning of the fractional model is explored in more detail, highlighting the hardening/softening duality of rock behavior. This fractional model allows for a reduced number of parameters, a simple form, guaranteed accuracy, and a unified law to model the full creep behavior of rock.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Computer Science, Interdisciplinary Applications
Kai Zhao et al.
Summary: A new creep-fatigue model for rock salt was proposed and validated through tests and simulations. Additionally, a three-dimensional geotechnical model was developed to analyze the deformation of CAES salt caverns during operation.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Multidisciplinary Sciences
Zhiming Zheng et al.
Summary: Different stress creep tests are conducted to better describe the creep properties of rocks. A model describing the rock creep process is established. A new method for determining creep parameters is proposed and the relationship between the creep parameters, stress, and time is analyzed. An improved creep model that considers the effects of stress state and time is developed and verified using experimental data.
SCIENTIFIC REPORTS
(2023)
Review
Engineering, Mechanical
Xiaoping Zhou et al.
Summary: This paper reviews the advancement of rock creep damage mechanics, including mechanisms, research methods, and constitutive models. The importance of creep research is emphasized, and several future research directions are pointed out.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Geological
Fei Wu et al.
Summary: Based on the Riemann-Liouville type fractional-order calculus operator theory and acoustic emission (AE) theory, this paper improves the traditional creep model and proposes a fractional-order derivative-based creep model for salt rock. The model is validated by uniaxial creep damage tests on rock salt specimens, and it shows a good agreement with the experimental results, accurately predicting the time point when salt rock enters the accelerated creep stage. The proposed model can simulate the whole process of rock creep well and has practical application value.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Yukun Ma et al.
Summary: A new nonlinear three-dimensional creep constitutive model for rocks was established by introducing the generalized Burgers model and damage mechanics theory, which can better describe the creep characteristics and damage process of rocks under different stresses.
Article
Geochemistry & Geophysics
Xuebin Li et al.
Summary: Coal-rock combination failure is the main cause for the instability of deep underground engineering. A creep constitutive model considering moisture content was established and numerical simulations were conducted to study the effects of stress environment and moisture content on creep characteristics of coal-rock combination.
Article
Energy & Fuels
Renbo Gao et al.
Summary: The creep behavior of salt rocks is important for energy storage. This paper focuses on a typical muddy salt rock in China and derives a new nonlinear creep damage constitutive model through uniaxial creep tests. The model accurately describes the accelerated creep stage and provides theoretical support for the safe operation of salt caverns in China.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Junbao Wang et al.
Summary: In this study, the creep response and unloading rebound effect of salt rock are explored through uniaxial compression creep and unloading rebound tests. A new nonlinear creep model is established and validated through numerical simulation and experimental testing.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
Xinjiang Wei et al.
Summary: This study investigates the dynamic changing process of jacking force with the jacked distance and the influencing factors of the maximum jacking force through indoor model tests and numerical simulations. The results show that the height of the soil overburden and the water content have significant impacts on the jacking force. The study also provides suggestions for the jacking speed in numerical analysis.
ADVANCES IN CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
Wancheng Zhu et al.
Summary: A damage-based creep model was established to quantify the impact of dynamic disturbances on rock creeping. Numerical simulations and case studies showed that dynamic disturbances could accelerate damage and deformation of creeping rock, affecting the stability of shaft.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Energy & Fuels
Zhou Jiaxing et al.
Summary: This study investigates the creep mechanical behavior of deep soft rock coal seam and proposes a nonlinear damage and hardening creep model. The rock's creep exhibits sudden changes, with crystal particle cracks leading to rock mass damage and grain movement along cavities causing hardening. The creep model accurately predicts accelerated failure and long-term strength, providing a theoretical basis for soft rock creep laws and ensuring the stability of energy extraction projects.
Article
Engineering, Environmental
Liping Qiao et al.
Summary: This study investigates the creep behavior of rocks under different stress-strain loading histories and proposes an internal state variable creep constitutive model based on the internal state variable theory. The model is capable of describing the creep behavior of rocks experienced complex stress-strain loading histories.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Chemistry, Physical
Youliang Chen et al.
Summary: In this study, a damage creep constitutive model considering the coupling of rock acid corrosion and true triaxial stress was established based on damage mechanics. The model parameters were identified and verified with experimental results, and the model can accurately describe the characteristics of each stage of true triaxial creep behavior of rock under acid environment.
Article
Energy & Fuels
Qingchuan He et al.
Summary: Salt cavern energy storage is crucial for optimizing China's energy reserve structure. However, the surrounding rock of the reservoir cavity is prone to creep and damage during long-term production processes, posing a serious safety risk. To address this, a long-term graded loading creep test was conducted on salt rock specimens, and a nonlinear creep-damage constitutive model was established to accurately describe the creep behavior of salt rock.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Multidisciplinary
Yunfei Gao et al.
Summary: In this work, a novel variable fractional order rheological model was established to describe the full-stage creep behavior of rocks, successfully capturing the trimodal creep behavior of rocks. The evolution of mechanical properties during creep was quantitatively described by the variable fractional order, and the physical significance of fractional order was explored.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Environmental Sciences
Hang Lin et al.
ENVIRONMENTAL EARTH SCIENCES
(2020)
