| Autor: |
Z. Q. Yin, H. F. Ma, Z. X. Hu, Y. Zou |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Journal of Engineering Science and Technology Review, Vol 7, Iss 2, Pp 169-174 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
1791-2377 |
| Popis: |
Fracture experiments in a notched semi-circular bend configuration were conducted to test the dynamic fracture toughness of a marble under static-dynamic coupling load using a modified split Hopkinson pressure bar. The fracture process of the specimen was monitored using a high speed (HS) camera. Based on digital image correlation (DIC) and strain gauges, the full-field strain fields and time-to-fracture of the marble were measured under static-dynamic coupling load. Experimental results show that dynamic fracture toughness was well determined, and the HS-DIC technique provides reliable full-field strain fields in the specimens under static-dynamic coupling loads. The failure characteristics of the marble under external impact were affected obviously by pre-compression stress. Increase of axial pre-compression stress was helpful to improve the crack propagation velocity, and dynamic crack initiation toughness was decreased. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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