Experimental Study on Creep Property of Similar Material for Jin Tan Salt Rock Gas Storage Medium

2012 ◽  
Vol 170-173 ◽  
pp. 772-776
Author(s):  
Kang Duan ◽  
Qiang Yong Zhang ◽  
Bing Cai ◽  
Xiao Bin Xu
Keyword(s):  
Uniaxial Compression ◽  
Rock Salt ◽  
Creep Property ◽  
Gas Storage ◽  
Salt Rock ◽  
Similar Material ◽  
Creep Tests ◽  
Deformation And Failure ◽  
Original Rock ◽  
Stress Dependent

Uniaxial compression creep tests have been performed on a kind of rock salt similar material and laminated salt rock similar material on the base of salt rock gas-storage in Jintan. The creep tests show that the rheological property of the similar material is basically the same with the original rock. Under the uniaxial compression, the deformation gradually approaches to be constant after the early short stage of creep attenuation. The similar material shows stress-dependent behavior obviously under different stress stage, the greater the load the higher the creep ratio and creep deformation. A creep constitutive equation which is suitable to rock salt is used to the similar material, and it fits with the obtained creep data very well. The results show that the similar material developed in this passage has the same creep property as the original salt rock,and this material can be used to simulated the deformation and failure of underground gas storage constructed in bedded salt deposits.

Mathematical Modeling of Deformation and Failure of Salt Rock Samples

2021 ◽  
Vol 57 (3) ◽  
pp. 370-379
Author(s):  
A. A. Baryakh ◽  
A. A. Tsayukov ◽  
A. V. Evseev ◽  
I. S. Lomakin
Keyword(s):  
Mathematical Modeling ◽  
Salt Rock ◽  
Deformation And Failure ◽  
Rock Samples

scholarly journals Structure-Properties Relations for Polyamide 6, Part 2: Influence of Processing Conditions during Injection Moulding on Deformation and Failure Kinetics

Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 779 ◽  
Author(s):  
Emanuele Parodi ◽  
Gerrit Peters ◽  
Leon Govaert
Keyword(s):  
Mechanical Properties ◽  
Relative Humidity ◽  
Mold Temperature ◽  
Polyamide 6 ◽  
Testing Temperature ◽  
Full Description ◽  
Time To Failure ◽  
Processing Conditions ◽  
Creep Tests ◽  
Deformation And Failure

The effect of processing conditions during injection on the structure formation and mechanical properties of injection molded polyamide 6 samples was investigated in detail. A large effect of the mold temperature on the crystallographic properties was observed. Also the the effect of pressure and shear flow was taken in to consideration and analysed. The yield and failure kinetics, including time-to-failure, were studied by performing tensile and creep tests at several test temperatures and relative humidities. As far as mechanical properties are concerned, a strong influence of temperature and relative humidity on the yield stress and time-to-failure was found. A semi-empirical model, able to describe yield and failure kinetics, was applied to the experimental results and related to the crystalline phase present in the sample. In agreement with findings in the literature it is observed that for high mold temperatures the sample morphology is more stable with respect to humidity and temperature than in case of low mold temperatures and this effects could be successfully captured by the model. The samples molded at low temperatures showed, during mechanical testing, a strong evolution of the crystallographic properties when exposed to high testing temperature and high relative humidity, i.e., an increase of crystallinity or a crystal phase transition. This makes a full description of the mechanical behavior rather complicated.

Stability analysis of Jintan underground rock salt gas storage cavern

2013 ◽  
Vol 9 (2) ◽  
pp. 268-283
Author(s):  
Jian Liu ◽  
Juan Song ◽  
Qiangyong Zhang ◽  
Wenqian Zhang
Keyword(s):  
Stability Analysis ◽  
Rock Salt ◽  
Gas Storage

scholarly journals Creep damage behavior of red sandstone after high temperature

2021 ◽  
Author(s):  
Xiaokang Pan ◽  
Filippo Berto ◽  
Xiaoping Zhou
Keyword(s):  
High Temperature ◽  
Uniaxial Compression ◽  
Deformation Modulus ◽  
Creep Damage ◽  
Viscosity Coefficient ◽  
Creep Tests ◽  
Red Sandstone ◽  
Instantaneous Strain ◽  
Treated Sample ◽  
Instantaneous Deformation

This work discusses the results from tests conducted to investigate the uniaxial compression and creep behavior of red sandstone. The original untreated sample and the 800 ℃ treated sample have been selected to carry out the experiments. It has been found that high temperature has obvious influence on the mechanical properties of red sandstone. The relationship between creep strain and instantaneous strain, as well as instantaneous deformation modulus and creep viscosity coefficient have been analyzed. It has been found that high temperature reduces the ability of red sandstone to resist instantaneous deformation and creep deformation. Acoustic emission (AE) technology has been also used in the loading process of uniaxial compression and creep tests, providing a powerful means for damage evolution analysis of red sandstone.

Study on Damage and Repair Mechanical Characteristics of Rock Salt Under Uniaxial Compression

2018 ◽  
Vol 52 (3) ◽  
pp. 659-671 ◽  
Author(s):  
Hongwu Yin ◽  
Chunhe Yang ◽  
Hongling Ma ◽  
Xilin Shi ◽  
Xiangsheng Chen ◽  
...  
Keyword(s):  
Uniaxial Compression ◽  
Rock Salt ◽  
Mechanical Characteristics

A nonlinear creep damage model for salt rock

2018 ◽  
Vol 28 (5) ◽  
pp. 758-771 ◽  
Author(s):  
Fei Wu ◽  
Jie Chen ◽  
Quanle Zou
Keyword(s):  
Test Data ◽  
Damage Model ◽  
Creep Damage ◽  
Nonlinear Creep ◽  
Salt Rock ◽  
Creep Tests ◽  
Nonlinear Constitutive Equation ◽  
Damage Constitutive Model ◽  
Creep Damage Model ◽  
Actual Stress

In the creep tests, stress is no longer a constant and increases gradually under the influence of damage occurring during accelerating creep, which is a slow-loading process rather than a conventional creep. With the accumulation of the damage over time, the actual stress increases greatly. The increased actual stress not only generates loading strain but also causes the steady creep rate to rise. This coupling possibly explains why salt rock presents nonlinear accelerating characteristics at the accelerating creep stage. In this work, the constraint of the present creep concept was overcome by assuming that the acceleration creep phase is a coupling process of loading and creeping. Furthermore, we demonstrate that the total strain in this phase is equal to the sum of loading strain and creeping strain. A new nonlinear constitutive equation for creep was then derived, and the mechanisms underlying the nonlinear accelerating characteristics emerging at the stage of accelerating creep are further explained. A step-loading experiment on salt rock was performed for a period of six months. The characteristics of accelerating creep appeared in the last step of loading. This new nonlinear creep damage constitutive model was used to fit and analyze the test data. Obtained results show that this model fits well to these test data and also favorably represents the nonlinear characteristics of accelerating creep, thus supporting the model’s validity.

Sign in / Sign up

Export Citation Format

Share Document