Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect
To explore the influence of initial damage on the dynamic characteristics of rock mass, the Φ 50 mm split Hopkinson pressure bar (SHPB) test system was used, and the uniaxial impact compression tests on yellow sandstone specimens with different damage degrees were conducted, and then the variation l...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/7937459 |
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| _version_ | 1832549159703412736 |
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| author | Aihong Lu Jinhai Xu Yu Xia Lei Sun |
| author_facet | Aihong Lu Jinhai Xu Yu Xia Lei Sun |
| author_sort | Aihong Lu |
| collection | DOAJ |
| description | To explore the influence of initial damage on the dynamic characteristics of rock mass, the Φ 50 mm split Hopkinson pressure bar (SHPB) test system was used, and the uniaxial impact compression tests on yellow sandstone specimens with different damage degrees were conducted, and then the variation law of mechanical properties of rock specimens with the initial damage was determined. The test results show that the dynamic stress-strain curve of rock specimens with initial damage can be roughly divided into compaction stage, elastic deformation stage, crack evolution stage, and strain-softening stage; the higher the initial damage degree of rock mass, the more significant the compaction stage. With the increase of the initial damage degree, the dynamic elastic modulus and peak stress of rock mass decrease gradually in a power number, while the peak strain of rock mass increases exponentially. With the increase of the initial damage degree, both the reflected energy ratio and the dissipated energy ratio decrease linearly, while the transmitted energy ratio increases linearly; the increasing rate of the transmitted energy ratio is greater than the decreasing rate of the reflected energy ratio. |
| format | Article |
| id | doaj-art-535d6afeaade4ce5b59604586f526e25 |
| 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-535d6afeaade4ce5b59604586f526e252025-02-03T06:12:05ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/79374597937459Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage EffectAihong Lu0Jinhai Xu1Yu Xia2Lei Sun3School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, ChinaState Key Laboratory of Coal of Resources and Safe Ming, China University of Mining and Technology, Xuzhou 221116, Jiangsu, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, ChinaState Key Laboratory of Coal of Resources and Safe Ming, China University of Mining and Technology, Xuzhou 221116, Jiangsu, ChinaTo explore the influence of initial damage on the dynamic characteristics of rock mass, the Φ 50 mm split Hopkinson pressure bar (SHPB) test system was used, and the uniaxial impact compression tests on yellow sandstone specimens with different damage degrees were conducted, and then the variation law of mechanical properties of rock specimens with the initial damage was determined. The test results show that the dynamic stress-strain curve of rock specimens with initial damage can be roughly divided into compaction stage, elastic deformation stage, crack evolution stage, and strain-softening stage; the higher the initial damage degree of rock mass, the more significant the compaction stage. With the increase of the initial damage degree, the dynamic elastic modulus and peak stress of rock mass decrease gradually in a power number, while the peak strain of rock mass increases exponentially. With the increase of the initial damage degree, both the reflected energy ratio and the dissipated energy ratio decrease linearly, while the transmitted energy ratio increases linearly; the increasing rate of the transmitted energy ratio is greater than the decreasing rate of the reflected energy ratio.http://dx.doi.org/10.1155/2021/7937459 |
| spellingShingle | Aihong Lu Jinhai Xu Yu Xia Lei Sun Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect Shock and Vibration |
| title | Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect |
| title_full | Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect |
| title_fullStr | Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect |
| title_full_unstemmed | Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect |
| title_short | Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect |
| title_sort | study on dynamic behavior and energy dissipation of rock considering initial damage effect |
| url | http://dx.doi.org/10.1155/2021/7937459 |
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