Journal Published Online: 27 August 2013
Volume 41, Issue 6

Inhomogeneous Micro-Structure Influence on Macro-Crack of Sandstone

CODEN: JTEVAB

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.

Author Information

Tan, Yunliang
Key Laboratory of Mine Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao, Shandong, CN
Yin, Yanchun
Key Laboratory of Mine Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao, Shandong, CN
Huang, Dongmei
Key Laboratory of Mine Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao, Shandong, CN
Pages: 8
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Stock #: JTE20130039
ISSN: 0090-3973
DOI: 10.1520/JTE20130039