Results 11 to 20 of about 37,286 (243)

A wellbore creep model based on the fractional viscoelastic constitutive equation

Petroleum Exploration and Development, 2017
To simulate the evolution of wellbore creep accurately, predict and prevent severe accidents such as borehole wall sloughing, casing collapse and sticking of the drill, based on previous studies, the springpot element was introduced into the classical ...
Yu PENG, Jinzhou ZHAO, Yongming LI
doaj   +3 more sources

Creep behaviour and constitutive model of coal filled with gas

International Journal of Mining Science and Technology, 2017
Coal exhibits different creep behaviours when filled with different amounts of gas. Creep tests of coal filled with 0 and 0.5 MPa gas were performed, and strain under different axial stress was compared.
Xiangchun Li, Chunli Yang, Ting Ren, Baisheng Nie, Caihong Zhao, Shuiwen Liu, Tao Jiang   +6 more
doaj   +3 more sources

Uniaxial creep characteristics and constitutive model of arkose sandstone with different moisture contents under repeated freeze thaw cycles. [PDF]

Sci Rep
Chen T, Chen Y, Wu P, Cao X, Kong L, Chang Z.   +5 more
europepmc   +3 more sources

Nonlinear creep constitutive model of rock under water and force conditions. [PDF]

Sci Rep
Peng GC, Zhu ZG, An JJ, Xu HH, Zhu T.
europepmc   +3 more sources

Creep damage constitutive model of rock based on the mechanisms of crack-initiated damage and extended damage

Underground Space
Since the classical element model cannot describe the nonlinear characteristics of rock during the entire compressive creep process, nonlinear elements and creep damage are generally introduced in the model to resolve this issue.
Tianbin Li, Chao Chen, Feng Peng, Chunchi Ma, Mou Li, Yixiang Wang   +5 more
doaj   +3 more sources

Creep constitutive model considering nonlinear creep degradation of fractured rock

International Journal of Mining Science and Technology
Stability analysis of underground constructions requires a model study of rock masses’ long-term performance. Creep tests under different stress conditions was conducted on intact granite and granite samples fractured at 30° and 45° angles.
Wang Chunping, Liu Jianfeng, Chen Liang, Liu Jian, Wang Lu, Liao Yilin   +5 more
doaj   +2 more sources

Research on Creep Deformation of Dissimilar FSWed T-Joints Under Different Ultrasonic Vibration Modes: Experiment, Constitutive Model, and Simulation Verification. [PDF]

Materials (Basel)
Ye T, Han Y, Zuo D, Fu H, Feng S, Gao C, Li W.   +6 more
europepmc   +3 more sources

Non-Unified Constitutive Models for the Simulation of the Asymmetrical Cyclic Behavior of GH4169 at Elevated Temperatures

Metals, 2022
The tensile, creep, fatigue and creep-fatigue tests of the nickel-based superalloy GH4169 were carried out. According to the deformation characteristics of GH4169 alloy, the Ohno-Karim kinematic model (O-K model) can be used to describe the tensile ...
Xuteng Hu, Shuying Zhuang, Haodong Zheng, Zuopeng Zhao, Xu Jia   +4 more
doaj   +1 more source

Creep Properties and Constitutive Model of Salt Rock [PDF]

Advances in Civil Engineering, 2021
Due to the advantages of low porosity, low permeability, high ductility, and excellent capacities for creep and damage self‐healing, salt rock is internationally considered as the ideal medium for underground storage of energy and disposal of radioactive waste.
Qiang Zhang, Zhanping Song, Junbao Wang, Yuwei Zhang, Tong Wang   +4 more
openaire   +3 more sources

The viscoplastic constitutive model of TC4 alloy under high temperature

Xibei Gongye Daxue Xuebao, 2023
TC4 alloy is widely used in the high temperature environment. This paper proposed an ununified viscoplastic constitutive model according to the uniaxial creep experiment and high temperature tensile experiment of TC4 alloy.
HE Yuxin, MA Yu'e
doaj   +1 more source