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《JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTITUTE》 1998-02
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Experiment Study of Rock Fracture under Dynamic Tension

Yu Yong (Yangtze River Scientific Research Institute, Wuhan 430010) Zhang Zhongxian, Yu Jie, Liao, Guohua, Meng Chunyan (College of Resoureces Engineering, University of Science and Technology Beijing, Beijing 100083)  
Using the newly developed tensile impact setup called split Hopkinson bar (SHTB), the dynamic tensile fracture tests of a round rock specimen with a kerf were carried out, and the results of the static tensile fracture were obtained with the material testing system (MTS). The test results showing that the values of fracture toughness and fracture energy change with loading rates were gained successfully. Based on the observations by scanning electronic microsope to both dynamically and statically fractured specimens, it shows that the complexity of the shape of fracture plane is closely related to fracture energy.
【CateGory Index】: TU458.3
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