The Secondary Development and Application of the Improved Nishihara Creep Model in Soft Rock Tunnels
Buildings, 2023 Given the complexity and diversity of rock formations, existing constitutive models struggle to accurately portray their mechanical properties, leading to substantial discrepancies between numerical simulation outcomes and reality.
Xianghui Deng +5 more
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Analysis of an improved Nishihara creep model considering plastic strain accumulation
Frontiers in Materials, 2023 Rock-engineering structures, particularly subway excavation rock-engineering structures, are subjected to the long-term effects of external loading that may gradually damage and cause creep and severe plastic deformations or even progressive failure. The
Yang Cheng, Liangliang Zhang
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Modified Nishihara Rheological Model considering the Effect of Thermal-Mechanical Coupling and Its Experimental Verification [PDF]
Advances in Materials Science and Engineering, 2018 The effect of temperature and pressure, which play important roles in the mechanical properties of rocks during deep energy exploitation, has not been sufficiently studied in the previous rock creep models. In order to investigate thermal effect in creep
Xingang Wang +4 more
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An Improved Nishihara Model for Frozen Loess considering the Influence of Temperature [PDF]
Advances in Materials Science and Engineering, 2018 A series of triaxial creep tests under the constant confining pressure are performed on frozen loess specimens, and the creep behavior of the frozen loess with respect to variations in both temperature and deviator stress is examined.
Xin Li +3 more
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Non-stationary Nishihara model in the particle flow code
工程科学学报, 2015 In order to accurately simulate the whole process of rock creep and explore the generation and development of mircofractures from the meso-level,a visco-elastoplastic Nishihara rheological constitutive model is developed in the two-dimensional particle ...
YANG Zhen-wei +4 more
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Improved Nonlinear Nishihara Shear Creep Model with Variable Parameters for Rock-Like Materials
Advances in Civil Engineering, 2020 Creep property is an important mechanical property of rocks. Given the complexity of rock masses, mechanical parameters change with time in the creep process.
Hang Lin +6 more
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Creep failure characteristics and damage creep model of red layer soft rock based on Perzyna viscoplastic theory [PDF]
Scientific ReportsRock creep is essentially a process of damage accumulation. According to the damage evolution of rock under creep conditions, the TAW2000 triaxial test system is used to carry out triaxial creep test on red layer soft rock taken from Yibo Tunnel in ...
Lei Chen +6 more
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Uniaxial creep characteristics and constitutive model of arkose sandstone with different moisture contents under repeated freeze thaw cycles [PDF]
Scientific ReportsTo investigate the creep characteristics of water-containing slope rocks in high-cold regions, this study conducted indoor physical and mechanical tests on arkose sandstone specimens, with moisture content and freeze-thaw cycle number as test variables ...
Tian Chen +5 more
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Creep constitutive model of strain energy density considering the whole process of creep deformation. [PDF]
PLoS ONEAiming at the problem that the traditional creep model is difficult to reflect the characteristics of accelerated creep stage of rock, the influence of stress state on accelerated creep is fully considered, and a constitutive model which can describe ...
Yuemei Li
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Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory [PDF]
Scientific ReportsOn the basis of the law of conservation of energy, the three stages of rock creep are analyzed. The reasons for the difficulty in studying the accelerated creep stage of rocks using the traditional creep model are expounded.
Di Zhou +9 more
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