A Comparative Study on Rock Properties in Splitting and Compressive Dynamic Tests
The dynamic properties of rock in splitting (tensile) and compressive tests are the focus of rock dynamic mechanics research. In this study, a split Hopkinson pressure bar (SHPB) apparatus was used to assess the comparability and strain rate effect of rock samples under two kinds of load conditions....
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/2861537 |
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| _version_ | 1832548742233849856 |
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| author | Nan Wu Zhende Zhu Yaojun Zhou Shihu Gao |
| author_facet | Nan Wu Zhende Zhu Yaojun Zhou Shihu Gao |
| author_sort | Nan Wu |
| collection | DOAJ |
| description | The dynamic properties of rock in splitting (tensile) and compressive tests are the focus of rock dynamic mechanics research. In this study, a split Hopkinson pressure bar (SHPB) apparatus was used to assess the comparability and strain rate effect of rock samples under two kinds of load conditions. With an increase in impact velocity under compression and splitting (tensile) tests, the strain rate of the samples increased continuously. The rock properties and strain rate in the two kinds of samples exhibited clear similarities: the dimensionless stress-strain curves of the rock samples were similar under the same strain rates. The peak strength and elastic modulus of the two kinds of samples increased with an increase in the strain rate. The number of cracks increased from intergranular to transgranular failure. The rack initiation value of the two kinds of samples was close at the same strain rate and declined with an increase in the strain rate as evidenced by a power function. |
| format | Article |
| id | doaj-art-d1715d78d0ac488c92d3784374b7c192 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-d1715d78d0ac488c92d3784374b7c1922025-02-03T06:13:11ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/28615372861537A Comparative Study on Rock Properties in Splitting and Compressive Dynamic TestsNan Wu0Zhende Zhu1Yaojun Zhou2Shihu Gao3Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaThe dynamic properties of rock in splitting (tensile) and compressive tests are the focus of rock dynamic mechanics research. In this study, a split Hopkinson pressure bar (SHPB) apparatus was used to assess the comparability and strain rate effect of rock samples under two kinds of load conditions. With an increase in impact velocity under compression and splitting (tensile) tests, the strain rate of the samples increased continuously. The rock properties and strain rate in the two kinds of samples exhibited clear similarities: the dimensionless stress-strain curves of the rock samples were similar under the same strain rates. The peak strength and elastic modulus of the two kinds of samples increased with an increase in the strain rate. The number of cracks increased from intergranular to transgranular failure. The rack initiation value of the two kinds of samples was close at the same strain rate and declined with an increase in the strain rate as evidenced by a power function.http://dx.doi.org/10.1155/2018/2861537 |
| spellingShingle | Nan Wu Zhende Zhu Yaojun Zhou Shihu Gao A Comparative Study on Rock Properties in Splitting and Compressive Dynamic Tests Shock and Vibration |
| title | A Comparative Study on Rock Properties in Splitting and Compressive Dynamic Tests |
| title_full | A Comparative Study on Rock Properties in Splitting and Compressive Dynamic Tests |
| title_fullStr | A Comparative Study on Rock Properties in Splitting and Compressive Dynamic Tests |
| title_full_unstemmed | A Comparative Study on Rock Properties in Splitting and Compressive Dynamic Tests |
| title_short | A Comparative Study on Rock Properties in Splitting and Compressive Dynamic Tests |
| title_sort | comparative study on rock properties in splitting and compressive dynamic tests |
| url | http://dx.doi.org/10.1155/2018/2861537 |
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