The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens
A series of dynamic fracture experiments on semicircular bend (SCB) marble specimens were conducted to characterize the loading rate effect using the INSTRON testing machine and the modified SHPB testing system. The fracture toughness of the marble specimens was measured from a low loading rate to a...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8876099 |
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| author | Fengqiang Gong Yunliang Wang Shanyong Wang |
| author_facet | Fengqiang Gong Yunliang Wang Shanyong Wang |
| author_sort | Fengqiang Gong |
| collection | DOAJ |
| description | A series of dynamic fracture experiments on semicircular bend (SCB) marble specimens were conducted to characterize the loading rate effect using the INSTRON testing machine and the modified SHPB testing system. The fracture toughness of the marble specimens was measured from a low loading rate to a high loading rate (10-3~106 MPa·m1/2s-1). The results show that the fracture toughness will increase with the loading rate. Since the fracture toughness at a magnitude of 10-3 MPa·m1/2s-1 is regarded as the static fracture toughness, the specific value of DIFf (the dynamic increase factor of fracture toughness) can be obtained at the other loading magnitudes from dynamic fracture tests. To describe the variation in DIFf from low to high loading rates, a new continuous model of DIFf was put forward to express the quantitative relation between the loading rate and rock dynamic fracture toughness. It is shown that the new DIFf model can accurately describe the loading rate effect on the dynamic fracture testing data for rock materials. |
| format | Article |
| id | doaj-art-d3deec93ada9409c93b96b9e5f04de3f |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-d3deec93ada9409c93b96b9e5f04de3f2025-02-03T01:28:34ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88760998876099The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend SpecimensFengqiang Gong0Yunliang Wang1Shanyong Wang2Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education (ERCSPEIME), Southeast University, Nanjing 211189, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaARC Centre of Excellence for Geotechnical Science and Engineering, Faculty of Engineering and Built Environment, The University of Newcastle, University Drive Callaghan, NSW 2308, AustraliaA series of dynamic fracture experiments on semicircular bend (SCB) marble specimens were conducted to characterize the loading rate effect using the INSTRON testing machine and the modified SHPB testing system. The fracture toughness of the marble specimens was measured from a low loading rate to a high loading rate (10-3~106 MPa·m1/2s-1). The results show that the fracture toughness will increase with the loading rate. Since the fracture toughness at a magnitude of 10-3 MPa·m1/2s-1 is regarded as the static fracture toughness, the specific value of DIFf (the dynamic increase factor of fracture toughness) can be obtained at the other loading magnitudes from dynamic fracture tests. To describe the variation in DIFf from low to high loading rates, a new continuous model of DIFf was put forward to express the quantitative relation between the loading rate and rock dynamic fracture toughness. It is shown that the new DIFf model can accurately describe the loading rate effect on the dynamic fracture testing data for rock materials.http://dx.doi.org/10.1155/2020/8876099 |
| spellingShingle | Fengqiang Gong Yunliang Wang Shanyong Wang The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens Geofluids |
| title | The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens |
| title_full | The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens |
| title_fullStr | The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens |
| title_full_unstemmed | The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens |
| title_short | The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens |
| title_sort | loading rate effect on the fracture toughness of marble using semicircular bend specimens |
| url | http://dx.doi.org/10.1155/2020/8876099 |
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