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首页> 外文期刊>Shock and vibration >Fracture Propagation Characteristic and Micromechanism of Rock-Like Specimens under Uniaxial and Biaxial Compression
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Fracture Propagation Characteristic and Micromechanism of Rock-Like Specimens under Uniaxial and Biaxial Compression

机译：单轴和双轴压缩下岩石样的断裂扩展特性和微观机制

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摘要

This paper presents a set of uniaxial and biaxial compression tests on the rock-like material specimens with different fracture geometries through a rock mechanics servo-controlled testing system (RMT-150C). On the basis of experimental results, the characteristics of fracture propagation under different fracture geometries and loading conditions are firstly obtained. The newly formed fractures are observed propagating from or near the preexisting crack tips for different specimens, while the propagation paths are affected by the loading condition obviously. Then, by adopting acoustic emission (AE) location technique, AE event localization characteristics in the process of loading are investigated. The locations of AE events are in good agreement with the macroscopic fracture propagation path. Finally, the micromechanism of macroscopic fracture propagation under uniaxial and biaxial compression conditions is analyzed, and the fracture propagation can be concluded as a result of microdamage accumulation inside the material. The results of this paper are helpful for theory and engineering design of the fractured rock mass.
机译：本文通过岩石力学伺服控制测试系统（RMT-150C），对具有不同断裂几何形状的岩石样试样提出了一套单轴和双轴压缩试验。根据实验结果，首先获得了不同几何形状和载荷条件下的裂缝扩展特征。观察到新形成的裂缝从不同样品的预先存在的裂纹尖端附近传播，而传播路径受载荷条件的影响明显。然后，采用声发射定位技术，研究了加载过程中的声发射事件定位特征。声发射事件的位置与宏观裂缝的传播路径非常吻合。最后，分析了在单轴和双轴压缩条件下宏观裂纹扩展的微观机制，并且由于材料内部的微损伤积累，可以得出裂纹扩展的结论。研究结果对裂隙岩体的理论和工程设计具有参考意义。

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  • 来源
    《Shock and vibration》 |2016年第3期|6018291.1-6018291.11|共11页
  • 作者

    Liu Xue-wei; Liu Quan-sheng; Huang Shi-bing; Wei Lai; Lei Guang-feng;

  • 作者单位

    Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China;

    Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China|Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov, Wuhan 430072, Hubei, Peoples R China;

    Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China;

    Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China;

    Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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