Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests
Filled inclusions in rock discontinuities play a key role in the mechanical characteristics of the rock and thereby influence the stability of rock engineering. In this study, a series of impact tests were performed using a split Hopkinson pressure bar system with high-speed photography to investiga...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | International Journal of Mining Science and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095268622000520 |
| _version_ | 1817993280050167808 |
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| author | Zhenyu Han Diyuan Li Xibing Li |
| author_facet | Zhenyu Han Diyuan Li Xibing Li |
| author_sort | Zhenyu Han |
| collection | DOAJ |
| description | Filled inclusions in rock discontinuities play a key role in the mechanical characteristics of the rock and thereby influence the stability of rock engineering. In this study, a series of impact tests were performed using a split Hopkinson pressure bar system with high-speed photography to investigate the effect of interlayer strength on the wave propagation and fracturing process in composite rock-mortar specimens. The results indicate that the transmission coefficient, nominal dynamic strength, interlayer closure, and specific normal stiffness generally increase linearly with increasing interlayer stiffness. The cement mortar layer can serve as a buffer during the deformation of composite specimens. The digital images show that tensile cracks are typically initiated at the rock-mortar interface, propagate along the loading direction, and eventually result in a tensile failure regardless of the interlayer properties. However, when a relatively weaker layer is sandwiched between the rock matrix, an increasing amount of cement mortar is violently ejected and slight slabbing occurs near the rock-mortar interface. |
| first_indexed | 2024-04-14T01:37:50Z |
| format | Article |
| id | doaj.art-b792c218a3a04e19b1e3a572b5fbd1e0 |
| institution | Directory Open Access Journal |
| issn | 2095-2686 |
| language | English |
| last_indexed | 2024-04-14T01:37:50Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Mining Science and Technology |
| spelling | doaj.art-b792c218a3a04e19b1e3a572b5fbd1e02022-12-22T02:19:53ZengElsevierInternational Journal of Mining Science and Technology2095-26862022-07-01324793806Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB testsZhenyu Han0Diyuan Li1Xibing Li2School of Resources and Safety Engineering, Central South University, Changsha 410083, China; School of Civil Engineering, Southeast University, Nanjing 210096, China; Department of Civil Engineering, Monash University, Melbourne, Victoria 3800, AustraliaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, China; Corresponding author.School of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaFilled inclusions in rock discontinuities play a key role in the mechanical characteristics of the rock and thereby influence the stability of rock engineering. In this study, a series of impact tests were performed using a split Hopkinson pressure bar system with high-speed photography to investigate the effect of interlayer strength on the wave propagation and fracturing process in composite rock-mortar specimens. The results indicate that the transmission coefficient, nominal dynamic strength, interlayer closure, and specific normal stiffness generally increase linearly with increasing interlayer stiffness. The cement mortar layer can serve as a buffer during the deformation of composite specimens. The digital images show that tensile cracks are typically initiated at the rock-mortar interface, propagate along the loading direction, and eventually result in a tensile failure regardless of the interlayer properties. However, when a relatively weaker layer is sandwiched between the rock matrix, an increasing amount of cement mortar is violently ejected and slight slabbing occurs near the rock-mortar interface.http://www.sciencedirect.com/science/article/pii/S2095268622000520Rock dynamicsWave propagationRock-mortarStiffnessEnergyFracturing |
| spellingShingle | Zhenyu Han Diyuan Li Xibing Li Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests International Journal of Mining Science and Technology Rock dynamics Wave propagation Rock-mortar Stiffness Energy Fracturing |
| title | Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests |
| title_full | Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests |
| title_fullStr | Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests |
| title_full_unstemmed | Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests |
| title_short | Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests |
| title_sort | dynamic mechanical properties and wave propagation of composite rock mortar specimens based on shpb tests |
| topic | Rock dynamics Wave propagation Rock-mortar Stiffness Energy Fracturing |
| url | http://www.sciencedirect.com/science/article/pii/S2095268622000520 |
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