A wedge loading compact tension system was used in this study to investigate the phenomenon of crack propagation in rock slabs. A high-resolution crack-strain-gage system was used to measure the velocity of crack propagation. The proposed experimental procedure is able to determine the crack velocity, fractal dimension and fracture toughness of the test specimens. This study finds that under different static loading rates, the fracture toughness of the rock specimen remains constant. However, increasing loading rate will result in an increase of measured average crack velocity. This study also finds that under the same loading rates, increasing fractal dimension will result in an increase of fractal crack velocity which is in full agreement with the theoretical prediction. Under the condition of the static loading, the relationship between the fractal dimension and the related parameter (fracture toughness, loading rates) is essentially constant.
|Number of pages||6|
|Journal||Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering|
|Issue number||SUPPL. 1|
|Publication status||Published - 2007 Jul 1|
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Geotechnical Engineering and Engineering Geology