The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and Unloading
To investigate the mechanical properties and energy evolution characteristics of sandstone depending on the water contents and confining pressure, the uniaxial and triaxial tests were conducted. The test results show that the strain energy was stored in the sandstone samples at the prepeak stage, an...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/4751612 |
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| author | Shuren Wang Paul Hagan Yanhai Zhao Xu Chang Ki-Il Song Zhengsheng Zou |
| author_facet | Shuren Wang Paul Hagan Yanhai Zhao Xu Chang Ki-Il Song Zhengsheng Zou |
| author_sort | Shuren Wang |
| collection | DOAJ |
| description | To investigate the mechanical properties and energy evolution characteristics of sandstone depending on the water contents and confining pressure, the uniaxial and triaxial tests were conducted. The test results show that the strain energy was stored in the sandstone samples at the prepeak stage, and that is suddenly released when the failure occurred, and energy dissipation is sharply increased at the postpeak stage. The damage and energy dissipation characteristics of the samples are observed clearly under the stepwise loading and unloading process. The critical strain energy and energy dissipation show a clear exponential relationship. The critical elastic energy decreases linearly as the water content increases. As the confining pressure increases, the critical elastic energy of the samples transforms from linear to exponential. The concept of energy enhancement factor is proposed to characterize the strengthening effect induced by the confining pressure on the energy storage capacity of the rock samples. The energy evolution of the sandstone samples is more sensitive to the confining pressure than that of the water content. |
| format | Article |
| id | doaj-art-d19dc350d2f541adac67a95d2bd54154 |
| institution | DOAJ |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-d19dc350d2f541adac67a95d2bd541542025-08-20T03:24:00ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/47516124751612The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and UnloadingShuren Wang0Paul Hagan1Yanhai Zhao2Xu Chang3Ki-Il Song4Zhengsheng Zou5Opening Laboratory for Deep Mine Construction, Henan Polytechnic University, Jiaozuo, ChinaSchool of Mining Engineering, University of New South Wales, Sydney, NSW 2052, AustraliaOpening Laboratory for Deep Mine Construction, Henan Polytechnic University, Jiaozuo, ChinaOpening Laboratory for Deep Mine Construction, Henan Polytechnic University, Jiaozuo, ChinaDepartment of Civil Engineering, Inha University, Incheon 22212, Republic of KoreaOpening Laboratory for Deep Mine Construction, Henan Polytechnic University, Jiaozuo, ChinaTo investigate the mechanical properties and energy evolution characteristics of sandstone depending on the water contents and confining pressure, the uniaxial and triaxial tests were conducted. The test results show that the strain energy was stored in the sandstone samples at the prepeak stage, and that is suddenly released when the failure occurred, and energy dissipation is sharply increased at the postpeak stage. The damage and energy dissipation characteristics of the samples are observed clearly under the stepwise loading and unloading process. The critical strain energy and energy dissipation show a clear exponential relationship. The critical elastic energy decreases linearly as the water content increases. As the confining pressure increases, the critical elastic energy of the samples transforms from linear to exponential. The concept of energy enhancement factor is proposed to characterize the strengthening effect induced by the confining pressure on the energy storage capacity of the rock samples. The energy evolution of the sandstone samples is more sensitive to the confining pressure than that of the water content.http://dx.doi.org/10.1155/2018/4751612 |
| spellingShingle | Shuren Wang Paul Hagan Yanhai Zhao Xu Chang Ki-Il Song Zhengsheng Zou The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and Unloading Advances in Civil Engineering |
| title | The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and Unloading |
| title_full | The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and Unloading |
| title_fullStr | The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and Unloading |
| title_full_unstemmed | The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and Unloading |
| title_short | The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and Unloading |
| title_sort | effect of confining pressure and water content on energy evolution characteristics of sandstone under stepwise loading and unloading |
| url | http://dx.doi.org/10.1155/2018/4751612 |
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