Inhomogeneous Micro-Structure Influence on Macro-Crack of Sandstone

    Volume 41, Issue 6 (November 2013)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 27 August 2013

    Page Count: 8


    Tan, Yunliang
    Key Laboratory of Mine Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao, Shandong

    Yin, Yanchun
    Key Laboratory of Mine Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao, Shandong

    Huang, Dongmei
    Key Laboratory of Mine Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao, Shandong

    (Received 15 February 2013; accepted 10 April 2013)

    Abstract

    SEM scanning and fractal dimension estimation were adopted to study the inhomogeneous microstructure features and its influences on the failure pattern of sandstone. The results show that different sandstones are of different self-similarities of microstructure. The average homogeneities of lithic arenite, greywacke, and subfeldspathic arenite are 5.61, 3.39, and 4.57 and estimated fractal dimensions of microstructure are 1.94, 1.52, and 1.84, respectively, indicating that the homogeneity of microstructure is well consistent with fractal dimension. The resulted macro-cracks of lithic arenite, greywacke, and subfeldspathic arenite are vertical cleavages, unordered discontinuous macro-cracks, and inclined macro-crack, respectively. The brittleness of lithic arenite, greywacke, and subfeldspathic arenite are 2.46, 3.54, and 2.61, respectively. The sandstone of brittleness tends to be easily ruptured in an abrupt manner, accompanying a sudden release of large elastic energy.


    Paper ID: JTE20130039

    DOI: 10.1520/JTE20130039

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    Author
    Title Inhomogeneous Micro-Structure Influence on Macro-Crack of Sandstone
    Symposium , 0000-00-00
    Committee D18