MODELING THE STRESS–STRAIN PROCESS

2008 ◽  
pp. 159-186
Keyword(s):  
Stress Strain ◽  
Strain Process

Research on Hydraulic Conductivity of Coarse Sandstone under Triaxial Compression

2011 ◽  
Vol 94-96 ◽  
pp. 1146-1151 ◽  
Author(s):  
Guan Rong ◽  
Xiao Jiang Wang
Keyword(s):  
Hydraulic Conductivity ◽  
Circumferential Strain ◽  
Triaxial Compression ◽  
Confining Pressure ◽  
Test Results ◽  
Stress Strain ◽  
Deformation And Failure ◽  
Maximum Value ◽  
Strain Process ◽  
Peak Value

Permeability test for complete stress-strain process of coarse sandstone were carried out in triaxial test instrument. On the basis of test results, the influence of confining pressure and strain on the hydraulic conductivity was discussed. It is shown that in the complete stress-strain process, hydraulic conductivity changes in the law that presents the same character with the curve of stress-strain. The hydraulic conductivity reduces slightly with the increase of deviatoric stress in the stage of micro fracture compressing and elastic; In the elastoplastic stage, along with the expansion of new fractures, the hydraulic conductivity increases slowly at first and then reaches sharply to the maximum value after peak point; In the post-peak stage, the fracture which controls the hydraulic conductivity of coarse sandstone is compressed because of the confining pressure and the hydraulic conductivity decreases. During the process of deformation and failure, the hydraulic conductivity is more sensitive to the change of circumferential strain. With the increase of confining pressure, the increased value from initial to peak value and the decreased value from peak to residual value decreases.

Seepage laws of two kinds of disastrous gas in complete stress–strain process of coal

2011 ◽  
Vol 21 (6) ◽  
pp. 851-856
Author(s):  
Shugang Cao ◽  
Ping Guo ◽  
Zunguo Zhang ◽  
Yi Li ◽  
Yong Wang
Keyword(s):  
Stress Strain ◽  
Strain Process

Physical insights into stress–strain process of polymers under tensile deformation via machine learning

2020 ◽  
Vol 18 (2-3) ◽  
pp. 323-334
Author(s):  
Rui Shi ◽  
Shu-Jia Li ◽  
Linxiuzi Yu ◽  
Hu-Jun Qian ◽  
Zhong-Yuan Lu
Keyword(s):  
Machine Learning ◽  
Tensile Deformation ◽  
Stress Strain ◽  
Strain Process

Regularity and mechanism of coal resistivity response with different conductive characteristics in complete stress–strain process

2015 ◽  
Vol 25 (5) ◽  
pp. 779-786 ◽  
Author(s):  
Peng Chen ◽  
Enyuan Wang ◽  
Xuexi Chen ◽  
Zhentang Liu ◽  
Zhonghui Li ◽  
...  
Keyword(s):  
Stress Strain ◽  
Strain Process

Experimental Study on Time Series Characteristics of Rock Acoustic Emission in Complete Stress-Strain Process under Uniaxial Compression

2011 ◽  
Vol 243-249 ◽  
pp. 2239-2244
Author(s):  
Yong Jie Yang ◽  
De Chao Wang ◽  
Kai Wang ◽  
Nan Nan Zhao
Keyword(s):  
Time Series ◽  
Acoustic Emission ◽  
Uniaxial Compression ◽  
Maximum Amplitude ◽  
Evolution Process ◽  
Emission Characteristics ◽  
Stress Strain ◽  
Strain Process ◽  
Short Period ◽  
Emission Time

Analysis of rock acoustic emission characteristics in complete stress-strain process under uniaxial compression shows that the evolution process of rock deformation and damage can be divided into five stages—compaction, linear elastic deformation, accelerate inelastic deformation, damage and development, plastic flow. Acoustic emission characteristics of rock can well reflect its compressive deformation and damage evolution process. Acoustic emission time series of typical plastic coal is comparatively dispersed and presents group shock type. The acoustic emission frequency events and their energy of coal are bigger around the damage point, but the maximum amplitude and the secondary maximum amplitude have not much difference. The acoustic emission events and their energy of very uniform and dense fragile limestone are mainly concentrated in a very short period of time before its damage and the acoustic emission time series manifests as isolated shock type. For sandstone whose homogeneous degree lies between typical plastic coal and very uniform and dense fragile limestone, its acoustic emission time series manifest as main shock type.

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