Dynamic rock tensile strengths of Laurentian granite: Experimental observation and micromechanical model
Tensile strength is an important material property for rocks. In applications where rocks are subjected to dynamic loads, the dynamic tensile strength is the controlling parameter. Similar to the study of static tensile strength, there are various methods proposed to measure the dynamic tensile stre...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-02-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775516302645 |
| _version_ | 1811265490866143232 |
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| author | Kaiwen Xia Wei Yao Bangbiao Wu |
| author_facet | Kaiwen Xia Wei Yao Bangbiao Wu |
| author_sort | Kaiwen Xia |
| collection | DOAJ |
| description | Tensile strength is an important material property for rocks. In applications where rocks are subjected to dynamic loads, the dynamic tensile strength is the controlling parameter. Similar to the study of static tensile strength, there are various methods proposed to measure the dynamic tensile strength of rocks. Here we examine dynamic tensile strength values of Laurentian granite (LG) measured from three methods: dynamic direct tension, dynamic Brazilian disc (BD) test, and dynamic semi-circular bending (SCB). We found that the dynamic tensile strength from direct tension has the lowest value, and the dynamic SCB gives the highest strength at a given loading rate. Because the dynamic direct tension measures the intrinsic rock tensile strength, it is thus necessary to reconcile the differences in strength values between the direct tension and the other two methods. We attribute the difference between the dynamic BD results and the direct tension results to the overload and internal friction in BD tests. The difference between the dynamic SCB results and the direct tension results can be understood by invoking the non-local failure theory. It is shown that, after appropriate corrections, the dynamic tensile strengths from the two other tests can be reduced to those from direct tension. |
| first_indexed | 2024-04-12T20:23:41Z |
| format | Article |
| id | doaj.art-1bddccf3834d44ff9185f9efb573fd91 |
| institution | Directory Open Access Journal |
| issn | 1674-7755 |
| language | English |
| last_indexed | 2024-04-12T20:23:41Z |
| publishDate | 2017-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj.art-1bddccf3834d44ff9185f9efb573fd912022-12-22T03:17:55ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552017-02-019111612410.1016/j.jrmge.2016.08.007Dynamic rock tensile strengths of Laurentian granite: Experimental observation and micromechanical modelKaiwen Xia0Wei Yao1Bangbiao Wu2Department of Civil Engineering, University of Toronto, Toronto, M5S 1A4, CanadaDepartment of Civil Engineering, University of Toronto, Toronto, M5S 1A4, CanadaState Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Civil Engineering, Tianjin University, Tianjin, 300072, ChinaTensile strength is an important material property for rocks. In applications where rocks are subjected to dynamic loads, the dynamic tensile strength is the controlling parameter. Similar to the study of static tensile strength, there are various methods proposed to measure the dynamic tensile strength of rocks. Here we examine dynamic tensile strength values of Laurentian granite (LG) measured from three methods: dynamic direct tension, dynamic Brazilian disc (BD) test, and dynamic semi-circular bending (SCB). We found that the dynamic tensile strength from direct tension has the lowest value, and the dynamic SCB gives the highest strength at a given loading rate. Because the dynamic direct tension measures the intrinsic rock tensile strength, it is thus necessary to reconcile the differences in strength values between the direct tension and the other two methods. We attribute the difference between the dynamic BD results and the direct tension results to the overload and internal friction in BD tests. The difference between the dynamic SCB results and the direct tension results can be understood by invoking the non-local failure theory. It is shown that, after appropriate corrections, the dynamic tensile strengths from the two other tests can be reduced to those from direct tension.http://www.sciencedirect.com/science/article/pii/S1674775516302645Dynamic tensile strengthBrazilian disc (BD) testSemi-circular bending (SCB)Direct tensionSplit Hopkinson bar |
| spellingShingle | Kaiwen Xia Wei Yao Bangbiao Wu Dynamic rock tensile strengths of Laurentian granite: Experimental observation and micromechanical model Journal of Rock Mechanics and Geotechnical Engineering Dynamic tensile strength Brazilian disc (BD) test Semi-circular bending (SCB) Direct tension Split Hopkinson bar |
| title | Dynamic rock tensile strengths of Laurentian granite: Experimental observation and micromechanical model |
| title_full | Dynamic rock tensile strengths of Laurentian granite: Experimental observation and micromechanical model |
| title_fullStr | Dynamic rock tensile strengths of Laurentian granite: Experimental observation and micromechanical model |
| title_full_unstemmed | Dynamic rock tensile strengths of Laurentian granite: Experimental observation and micromechanical model |
| title_short | Dynamic rock tensile strengths of Laurentian granite: Experimental observation and micromechanical model |
| title_sort | dynamic rock tensile strengths of laurentian granite experimental observation and micromechanical model |
| topic | Dynamic tensile strength Brazilian disc (BD) test Semi-circular bending (SCB) Direct tension Split Hopkinson bar |
| url | http://www.sciencedirect.com/science/article/pii/S1674775516302645 |
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