An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical Stresses
Creep tests on brittle sandstone specimens were performed to investigate the time-dependent characteristics in the interval of different critical stresses. The results showed that failure will not occur when the loaded stress σ1 is less than the critical stress of dilation σcd, while all specimens w...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/4604027 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832549023083397120 |
|---|---|
| author | Chao Yang Xingchen Dong Xuan Xu Qiancheng Sun |
| author_facet | Chao Yang Xingchen Dong Xuan Xu Qiancheng Sun |
| author_sort | Chao Yang |
| collection | DOAJ |
| description | Creep tests on brittle sandstone specimens were performed to investigate the time-dependent characteristics in the interval of different critical stresses. The results showed that failure will not occur when the loaded stress σ1 is less than the critical stress of dilation σcd, while all specimens were destroyed when σ1 is larger than σcd. In addition, the value of σcd was very close to the long-term strength obtained by the method of the isochronous stress-strain curve. Therefore, σcd can be regarded as the long-term strength of the sandstone specimens. When σ1 is larger than σcd, the time required for the failure of specimen tf decreases with the increase of σ1; the creep rate dε/dt increases with time t, and the specimen will be destroyed when it reaches a maximum value (dε/dt)max. Both relationships tf and σ1 and (dε/dt)max and σ1 can be described by the exponential function. Then, a nonlinear damage creep model considering the deformation damage and strength damage in the interval of different critical stresses was established, which can describe the whole creep process and predict the failure time of sandstone specimens. |
| format | Article |
| id | doaj-art-435bbb9c37c84588aa80562ffd6b6aa9 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-435bbb9c37c84588aa80562ffd6b6aa92025-02-03T06:12:20ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/46040274604027An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical StressesChao Yang0Xingchen Dong1Xuan Xu2Qiancheng Sun3Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang 443002, ChinaKey Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang 443002, ChinaKey Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang 443002, ChinaKey Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang 443002, ChinaCreep tests on brittle sandstone specimens were performed to investigate the time-dependent characteristics in the interval of different critical stresses. The results showed that failure will not occur when the loaded stress σ1 is less than the critical stress of dilation σcd, while all specimens were destroyed when σ1 is larger than σcd. In addition, the value of σcd was very close to the long-term strength obtained by the method of the isochronous stress-strain curve. Therefore, σcd can be regarded as the long-term strength of the sandstone specimens. When σ1 is larger than σcd, the time required for the failure of specimen tf decreases with the increase of σ1; the creep rate dε/dt increases with time t, and the specimen will be destroyed when it reaches a maximum value (dε/dt)max. Both relationships tf and σ1 and (dε/dt)max and σ1 can be described by the exponential function. Then, a nonlinear damage creep model considering the deformation damage and strength damage in the interval of different critical stresses was established, which can describe the whole creep process and predict the failure time of sandstone specimens.http://dx.doi.org/10.1155/2021/4604027 |
| spellingShingle | Chao Yang Xingchen Dong Xuan Xu Qiancheng Sun An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical Stresses Shock and Vibration |
| title | An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical Stresses |
| title_full | An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical Stresses |
| title_fullStr | An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical Stresses |
| title_full_unstemmed | An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical Stresses |
| title_short | An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical Stresses |
| title_sort | experimental study on the creep characteristics of sandstone in the interval of different critical stresses |
| url | http://dx.doi.org/10.1155/2021/4604027 |
| work_keys_str_mv | AT chaoyang anexperimentalstudyonthecreepcharacteristicsofsandstoneintheintervalofdifferentcriticalstresses AT xingchendong anexperimentalstudyonthecreepcharacteristicsofsandstoneintheintervalofdifferentcriticalstresses AT xuanxu anexperimentalstudyonthecreepcharacteristicsofsandstoneintheintervalofdifferentcriticalstresses AT qianchengsun anexperimentalstudyonthecreepcharacteristicsofsandstoneintheintervalofdifferentcriticalstresses AT chaoyang experimentalstudyonthecreepcharacteristicsofsandstoneintheintervalofdifferentcriticalstresses AT xingchendong experimentalstudyonthecreepcharacteristicsofsandstoneintheintervalofdifferentcriticalstresses AT xuanxu experimentalstudyonthecreepcharacteristicsofsandstoneintheintervalofdifferentcriticalstresses AT qianchengsun experimentalstudyonthecreepcharacteristicsofsandstoneintheintervalofdifferentcriticalstresses |