A Weibull distribution-based constitutive model of creep of salt rock

2013 ◽  
pp. 497-503
Author(s):  
H Zhou ◽  
J Ding ◽  
J Liu ◽  
J Liu
Keyword(s):  
Constitutive Model ◽  
Weibull Distribution ◽  
Salt Rock

scholarly journals Creep Properties and Constitutive Model of Salt Rock

2021 ◽  
Vol 2021 ◽  
pp. 1-29
Author(s):  
Qiang Zhang ◽  
Zhanping Song ◽  
Junbao Wang ◽  
Yuwei Zhang ◽  
Tong Wang
Keyword(s):  
Mechanical Properties ◽  
Constitutive Model ◽  
Effect Of Temperature ◽  
Creep Process ◽  
Underground Storage ◽  
Self Healing ◽  
Salt Rock ◽  
Creep Properties ◽  
Term Operation ◽  
Rock Creep

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. As one of the most important mechanical properties of salt rock, creep properties are closely related to the long-term operation stability and safety of salt rock underground storage cavern. A comprehensive review on the creep properties and constitutive model of salt rock is put forward in this paper. The opinions and suggestions on the research priority and direction of salt rock's mechanical properties in the future are put forward: (1) permeability variation of salt rock under the coupling effect of temperature and stress; (2) damage mechanism and evolution process under the effect of creep-fatigue interaction and low frequency cyclic loading; (3) microdeformation mechanisms of salt rock and the relationship between microstructure variations and macrocreep behavior during creep process; (4) the establishment of the creep damage constitutive model with simple form, less parameters, easy application, and considering the damage self-healing ability of salt rock simultaneously.

scholarly journals Analysis of Three-Dimensional Damage Constitutive Model of Frozen Sand Based on the Influence of Intermediate Principal Stress and Temperature

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Shilong Ma ◽  
Zhaoming Yao ◽  
Shuang Liu ◽  
Xuan Pan
Keyword(s):  
Constitutive Model ◽  
Weibull Distribution ◽  
Principal Stress ◽  
Three Dimensional ◽  
Intermediate Principal Stress ◽  
Frozen Soil ◽  
Stress Coefficient ◽  
Frozen Sand ◽  
Distribution Parameters ◽  
Damage Constitutive Model

To study the mechanical properties of frozen soil, it is necessary to understand the damage characteristics of frozen soil. Four types of three-dimensional indoor tests of frozen sand were carried out at −5°C, −10°C, and −15°C to study the mechanical damage properties. These include different stress path tests with the principal stress coefficients of 0, 0.25, 0.5, and 0.75 while analyzing the entire failure process. First, the three-dimensional compression test of frozen sand was studied to analyze the influence of temperature and intermediate principal stress coefficient on the large principal stress of frozen soil. The damage cost of frozen sand under the influence of different temperatures and intermediate principal stress coefficients was also established. Second, using the characteristics of discreteness and randomness of the distribution of the microelements inside the frozen soil and assuming that the failure of the microelement of the frozen soil obeys the Weibull distribution, the Drucker–Prager strength criterion was used as the statistical distribution variable of the microelement of the frozen soil based on the strain equivalence hypothesis, statistical theory, and continuous damage mechanics. This allows for a constitutive model of frozen sand damage under the three-dimensional stress state to be established. Finally, the model parameter values through low-temperature three-dimensional test data were able to be determined. This model allows for the physical meaning of Weibull distribution parameters F0 and m to be analyzed, and the distribution parameters with temperature and intermediate principal stress coefficient can be modified to obtain a modified frozen sand damage constitutive model. The results show that the modified damage constitutive model can simulate the entire process curve of the large principal stress-strain of frozen sand. It shows that the large principal stress of frozen sand increases with the increase of temperature and intermediate principal stress coefficient. Concurrently, the frozen sand damage constitutive model proposed in this paper can describe the deformation behavior of frozen soil under different temperature and stress paths and can be adapted to various other sediment types.

A viscoelastic, viscoplastic, and viscodamage constitutive model of salt rock for underground energy storage cavern

2020 ◽  
Vol 119 ◽  
pp. 103288 ◽  
Author(s):  
Jianqiang Deng ◽  
Yaoru Liu ◽  
Qiang Yang ◽  
Wei Cui ◽  
Yinbang Zhu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Constitutive Model ◽  
Salt Rock

Study on Constitutive Model of Weibull Distribution of Cement-Soil Uniaxial Stress Conditions

2012 ◽  
Vol 184-185 ◽  
pp. 810-817
Author(s):  
Zhi Nang Yu ◽  
Xin Jiang Song
Keyword(s):  
Constitutive Model ◽  
Weibull Distribution ◽  
Random Variable ◽  
Uniaxial Stress ◽  
Distribution Model ◽  
Proposed Model ◽  
Soil Stress ◽  
Uniaxial Compressive Test ◽  
Cement Soil ◽  
Nonlinear Elastic

According to the results of cement-soil uniaxial compressive test, consider cement-soil stress-strain relations as a continuous random process, the function of random variable obeys Weibull distribution, and introduce generalized hooke′s law in order to establish Weibull distribution of cement-soil constitutive model, solve the softening problem that a variety of incremental nonlinear elastic models cannot reflect the cement-soil. This paper discussed the parameter character of Weibull distribution model of cement-soil, presented the solving method of parameters of cement-soil Weibull distribution constitutive model, verified by results of test, revealed the rationality of the model and shows that the proposed model is more convenient than other model, have widely application value.

Study on the Creep Parameters of Salt Rock Constitutive Function

2014 ◽  
Vol 1079-1080 ◽  
pp. 166-169 ◽  
Author(s):  
Hai Peng Zhang ◽  
Yi Jin ◽  
Long Ma
Keyword(s):  
Constitutive Model ◽  
Creep Test ◽  
Constitutive Equations ◽  
Determination Method ◽  
Salt Rock ◽  
Constitutive Function ◽  
Rock Creep ◽  
Creep Models ◽  
Creep Constitutive Model

Salt rock is a kind ofthe most suitablemedium for energy storages, because of its strongcreep behavior. "Burgers" and "Norton" is the two classic creep models. This paper starts from the establishment of creep constitutive model to obtain the determination method of creep constitutive parameters.Finally, it takes Nanjing salt rock creep test (2003) as an example to solve the parameters in Burgers and Norton constitutive equations.

Statistical thermal damage constitutive model of rocks based on Weibull distribution

2021 ◽  
Vol 14 (6) ◽  
Author(s):  
Zhennan Zhu ◽  
Hong Tian ◽  
Ren Wang ◽  
Guosheng Jiang ◽  
Bin Dou ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Weibull Distribution ◽  
Thermal Damage ◽  
Damage Constitutive Model
Sign in / Sign up

Export Citation Format

Share Document