Results 1 to 10 of about 1,567 (145)

The Secondary Development and Application of the Improved Nishihara Creep Model in Soft Rock Tunnels [PDF]

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, Junxin Shi, Xiaolin Li, Rui Wang, Jinzeng Zhang, Xin Yang   +5 more
doaj   +5 more sources

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, Enlong Liu, Bingtang Song, Xingyan Liu   +3 more
doaj   +4 more sources

Improved Nonlinear Nishihara Shear Creep Model with Variable Parameters for Rock-Like Materials [PDF]

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, Xing Zhang, Yixian Wang, Rui Yong, Xiang Fan, Shigui Du, Yanlin Zhao   +6 more
doaj   +3 more sources

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
doaj   +4 more sources

An Improved Nishihara Model Considering the Influence of Moisture Content on the Whole Shear Creep Process of Shale [PDF]

Processes
The moisture content is closely related to the shear creep deformation behavior of soft rock, and the linear creep deformation behavior of soft rock can be described by the classical Nishihara model. However, its accuracy in describing accelerated nonlinear creep characteristics and the effects of moisture content still needs to be improved.
Liyao Ma, Mingfeng Lei, Lichuan Wang, Bin Hu, Yaqian Zhao, Jingjing Zhang   +5 more
exaly   +4 more sources

Fractional creep model and experimental study of unsaturated silty clay in Fuyang [PDF]

Frontiers in Earth Science, 2023
Due to the long-term overdraft of groundwater in Fuyang, silty clay in this area has been in an unsaturated state for a long time, which caused ground subsidence and threatened the safety of engineering construction.
Daguo Wu, Daguo Wu, Guangyao Chen, Zhenzhao Xia, Jianhe Peng, Jingyin Mao   +5 more
doaj   +3 more sources

Creep damage model of deep granite under coupled temperature-stress conditions [PDF]

Scientific Reports
To investigate the long-term creep behavior of deep granite in geological repositories for high-level radioactive waste under coupled temperature and stress conditions, a full-time temperature–stress coupled creep damage constitutive model (TSD model ...
Jun Hu, Junxin Shi, Jin Wu, Shuai Zhang, Yamin Zhao, Shangjun Zhao, Zhaokui Sun, Hanyu Dang, Houhai Yuan   +8 more
doaj   +2 more sources

Creep failure characteristics and damage creep model of red layer soft rock based on Perzyna viscoplastic theory [PDF]

Scientific Reports
Rock 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, Jinchi Han, Shuguang Zhang, Jiaxu Jin, Baoxin Jia, Jiashun Liu, Jupeng Tang   +6 more
doaj   +2 more sources

Creep constitutive model of strain energy density considering the whole process of creep deformation. [PDF]

PLoS ONE
Aiming 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
doaj   +2 more sources

Creep constitutive modeling of the shear strength of the permafrost-concrete interface considering the stress level at -1°C. [PDF]

PLoS ONE
The shear creep characteristics of the contact surface between the permafrost and the structure play an important role in the study of the law of deformation and the measures for the prevention and control of pile foundations. In order to study the creep
Fei He, Wanyu Lei, Erqing Mao, Qingquan Liu, Hangjie Chen, Xu Wang   +5 more
doaj   +2 more sources