Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure
Dynamic compressive tests of sand under passive confining pressure were carried out using a Split Hopkinson Pressure Bar (SHPB) setup. The dynamic response, energy dissipation and particle-breaking behaviors of sand subjected to high-speed impact were investigated. Sand specimens with moisture conte...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-07-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/13/4690 |
| _version_ | 1797442784564609024 |
|---|---|
| author | Liang Li Xinyu Kou Gao Zhang Kewei Huang |
| author_facet | Liang Li Xinyu Kou Gao Zhang Kewei Huang |
| author_sort | Liang Li |
| collection | DOAJ |
| description | Dynamic compressive tests of sand under passive confining pressure were carried out using a Split Hopkinson Pressure Bar (SHPB) setup. The dynamic response, energy dissipation and particle-breaking behaviors of sand subjected to high-speed impact were investigated. Sand specimens with moisture contents of 0%, 2%, 4%, 8%, 10% and 12% and relative densities of 0.1, 0.5 and 0.9 were prepared. The variation in the strain rate was controlled between 90 s<sup>−1</sup> and 500 s<sup>−1</sup>. The specimens were confined in a designed sleeve to create passive confining pressure. The experimental results show that the sand specimens were extremely sensitive to the strain rate. When the strain rate was less than 400 s<sup>−1</sup>, the stress and strain of the specimens increased with the increase in the strain rate but decreased when the strain rate exceeded 400 s<sup>−1</sup>. The peak strain and peak stress increased with the increase in the relative density. Particle breakage was aggravated with the strain-rate increase. Compared with the specimen without water, the relative breakage rate of the specimen with a moisture content of 12% decreased by 30.53% when the strain rate was about 95 s<sup>−1</sup> and by 25.44% when the strain rate was about 460 s<sup>−1</sup>. The analysis of energy dissipation revealed the essential cause of sand destruction. The specific energy absorption rate increased with the increases in the initial relative density and moisture content. |
| first_indexed | 2024-03-09T12:47:06Z |
| format | Article |
| id | doaj.art-9c7c57e1ab384a3ea009d5c7b5bbb447 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T12:47:06Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9c7c57e1ab384a3ea009d5c7b5bbb4472023-11-30T22:10:48ZengMDPI AGMaterials1996-19442022-07-011513469010.3390/ma15134690Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining PressureLiang Li0Xinyu Kou1Gao Zhang2Kewei Huang3Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Ministry of Education, Beijing 100124, ChinaKey Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Ministry of Education, Beijing 100124, ChinaKey Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Ministry of Education, Beijing 100124, ChinaFuzhou Academy of Building Research Co., Ltd., Fuzhou 350003, ChinaDynamic compressive tests of sand under passive confining pressure were carried out using a Split Hopkinson Pressure Bar (SHPB) setup. The dynamic response, energy dissipation and particle-breaking behaviors of sand subjected to high-speed impact were investigated. Sand specimens with moisture contents of 0%, 2%, 4%, 8%, 10% and 12% and relative densities of 0.1, 0.5 and 0.9 were prepared. The variation in the strain rate was controlled between 90 s<sup>−1</sup> and 500 s<sup>−1</sup>. The specimens were confined in a designed sleeve to create passive confining pressure. The experimental results show that the sand specimens were extremely sensitive to the strain rate. When the strain rate was less than 400 s<sup>−1</sup>, the stress and strain of the specimens increased with the increase in the strain rate but decreased when the strain rate exceeded 400 s<sup>−1</sup>. The peak strain and peak stress increased with the increase in the relative density. Particle breakage was aggravated with the strain-rate increase. Compared with the specimen without water, the relative breakage rate of the specimen with a moisture content of 12% decreased by 30.53% when the strain rate was about 95 s<sup>−1</sup> and by 25.44% when the strain rate was about 460 s<sup>−1</sup>. The analysis of energy dissipation revealed the essential cause of sand destruction. The specific energy absorption rate increased with the increases in the initial relative density and moisture content.https://www.mdpi.com/1996-1944/15/13/4690sanddynamic compressive behaviorspassive confining pressureimpact dynamic responseparticle breakageSHPB |
| spellingShingle | Liang Li Xinyu Kou Gao Zhang Kewei Huang Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure Materials sand dynamic compressive behaviors passive confining pressure impact dynamic response particle breakage SHPB |
| title | Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure |
| title_full | Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure |
| title_fullStr | Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure |
| title_full_unstemmed | Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure |
| title_short | Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure |
| title_sort | experimental study on dynamic compressive behaviors of sand under passive confining pressure |
| topic | sand dynamic compressive behaviors passive confining pressure impact dynamic response particle breakage SHPB |
| url | https://www.mdpi.com/1996-1944/15/13/4690 |
| work_keys_str_mv | AT liangli experimentalstudyondynamiccompressivebehaviorsofsandunderpassiveconfiningpressure AT xinyukou experimentalstudyondynamiccompressivebehaviorsofsandunderpassiveconfiningpressure AT gaozhang experimentalstudyondynamiccompressivebehaviorsofsandunderpassiveconfiningpressure AT keweihuang experimentalstudyondynamiccompressivebehaviorsofsandunderpassiveconfiningpressure |