Confining pressure effect on energy parameters of sandstones based on damage evolution
The characteristic parameters corresponding to damage evolution state of rock material are crucial to designing, predicting and monitoring the stability of geotechnical engineering.The cyclic loading-unloading triaxial compression tests of sandstones were implemented with different confining pressur...
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2020-06-01
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| Series: | 矿业科学学报 |
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| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/286 |
| _version_ | 1811223253103935488 |
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| author | Cheng Hongming Yang Xiaobin Liu Junjia Chen Xunlu |
| author_facet | Cheng Hongming Yang Xiaobin Liu Junjia Chen Xunlu |
| author_sort | Cheng Hongming |
| collection | DOAJ |
| description | The characteristic parameters corresponding to damage evolution state of rock material are crucial to designing, predicting and monitoring the stability of geotechnical engineering.The cyclic loading-unloading triaxial compression tests of sandstones were implemented with different confining pressure, and the damage evolution state were determined by the lateral strain method and the volumetric strain method, and the energy parameters phased evolution, the energy evolution of characteristic points corresponding to damage evolution state and relation with confining pressure, were analyzed based on damage evolution state.The result showed that:with different confining pressure, the energy parameters increased with the increase of the strain at each stage before the pre-peak;the mutation of the elastic strain energy and the dissipation energy at peak stress transferred to post-peak with the increase of the confining pressure;the energy parameters decreased to level off at residual stress stage.The energy parameters had a power function decrease with confining pressure at the point of <i>σ</i><sub>cc</sub>, and the dissipation energy decreased to level off with the increase of the confining pressure.At the points of <i>σ</i><sub>ci</sub>, <i>σ</i><sub>cd</sub> and <i>σ</i><sub>p</sub>, the energy parameters increased linearly with confining pressure, and there was small change trend of the difference between the total input energy and the elastic strain energy with the confining pressure at the different characteristic points, and the relative difference between the total input energy and the elastic strain energy was minimum, and the total input energy converted into the elastic strain energy was maximum at point <i>σ</i><sub>cd</sub>. |
| first_indexed | 2024-04-12T08:29:50Z |
| format | Article |
| id | doaj.art-a6b73444717d4316b3b7a5fd50bd854d |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-12T08:29:50Z |
| publishDate | 2020-06-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-a6b73444717d4316b3b7a5fd50bd854d2022-12-22T03:40:14ZengEmergency Management Press矿业科学学报2096-21932020-06-015324925610.19606/j.cnki.jmst.2020.03.00120200301Confining pressure effect on energy parameters of sandstones based on damage evolutionCheng Hongming0Yang Xiaobin1Liu Junjia2Chen Xunlu3School of Emergency Management and Safety Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaThe characteristic parameters corresponding to damage evolution state of rock material are crucial to designing, predicting and monitoring the stability of geotechnical engineering.The cyclic loading-unloading triaxial compression tests of sandstones were implemented with different confining pressure, and the damage evolution state were determined by the lateral strain method and the volumetric strain method, and the energy parameters phased evolution, the energy evolution of characteristic points corresponding to damage evolution state and relation with confining pressure, were analyzed based on damage evolution state.The result showed that:with different confining pressure, the energy parameters increased with the increase of the strain at each stage before the pre-peak;the mutation of the elastic strain energy and the dissipation energy at peak stress transferred to post-peak with the increase of the confining pressure;the energy parameters decreased to level off at residual stress stage.The energy parameters had a power function decrease with confining pressure at the point of <i>σ</i><sub>cc</sub>, and the dissipation energy decreased to level off with the increase of the confining pressure.At the points of <i>σ</i><sub>ci</sub>, <i>σ</i><sub>cd</sub> and <i>σ</i><sub>p</sub>, the energy parameters increased linearly with confining pressure, and there was small change trend of the difference between the total input energy and the elastic strain energy with the confining pressure at the different characteristic points, and the relative difference between the total input energy and the elastic strain energy was minimum, and the total input energy converted into the elastic strain energy was maximum at point <i>σ</i><sub>cd</sub>.http://kykxxb.cumtb.edu.cn/article/id/286sandstonesdamage evolutioncharacteristic pointsenergy parametersconfining pressure |
| spellingShingle | Cheng Hongming Yang Xiaobin Liu Junjia Chen Xunlu Confining pressure effect on energy parameters of sandstones based on damage evolution 矿业科学学报 sandstones damage evolution characteristic points energy parameters confining pressure |
| title | Confining pressure effect on energy parameters of sandstones based on damage evolution |
| title_full | Confining pressure effect on energy parameters of sandstones based on damage evolution |
| title_fullStr | Confining pressure effect on energy parameters of sandstones based on damage evolution |
| title_full_unstemmed | Confining pressure effect on energy parameters of sandstones based on damage evolution |
| title_short | Confining pressure effect on energy parameters of sandstones based on damage evolution |
| title_sort | confining pressure effect on energy parameters of sandstones based on damage evolution |
| topic | sandstones damage evolution characteristic points energy parameters confining pressure |
| url | http://kykxxb.cumtb.edu.cn/article/id/286 |
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