Abstract
In this paper, experiments are carried out to study the quasi-static and dynamic fracture behaviour of sedimentary, igneous and metamorphic rocks. The notched semi-circular bending method has been employed to determine fracture parameters over a wide range of loading rates using both a servo-hydraulic machine and a split Hopkinson pressure bar (SHPB). The time to fracture, crack speed and velocity of the moving specimen halves are measured by strain gauge, crack propagation gauge and high-speed photography on the macroscopic level. This study reveals clearly that: dynamic crack initiation and growth toughness increase with the increase of loading rate and crack speed; the kinetic energy of the moving specimen halves increases with increasing impact speed of the striker; and dynamic fracture energy and increases rapidly with increasing crack speed.
| Original language | English |
|---|---|
| Title of host publication | Rock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium |
| Publisher | Taylor & Francis |
| Pages | 119-124 |
| Number of pages | 6 |
| Publication status | Published - 2014 |
| Externally published | Yes |
| Event | European Rock Mechanics Symposium 2014 - Vigo, Spain Duration: 27 May 2014 → 29 May 2014 https://www.onepetro.org/conferences/ISRM/EUROCK14 (Proceedings) |
Conference
| Conference | European Rock Mechanics Symposium 2014 |
|---|---|
| Abbreviated title | EUROCK 2014 |
| Country/Territory | Spain |
| City | Vigo |
| Period | 27/05/14 → 29/05/14 |
| Internet address |
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