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Published on: April 27, 2019
Mechanical analysis and failure modes prediction of composite rock under uniaxial compression
Jianguang Li1, Zhuoqun Yu2, Ziyi Zhou1
1School of Mechanical and Electrical Engineering, Qingdao University of Science and Technology, Qingdao, 266061, China.
Abstract:
Composite rocks are easily encountered in a wide range of geotechnical construction projects. Understanding their mechanical properties and failure modes is very important to ensure project quality and safety. This study conducted a mechanical analysis to assess the stress distribution in composite rock with a horizontal interlayer and predicted the possible failure modes. Uniaxial compression tests were carried out on the composite rock samples to reveal their mechanical properties. It was concluded that a composite rock with a thick interlayer failed more easily than a composite rock with a thin interlayer. Four potential failure modes were related to the internal stress distribution under compression and the differences in deformation capacity and strength among the constituent components. The stress distribution derived from the mechanical analysis could explain the failure mechanism very well. These results verified the validity of the mechanical analysis results and improved understanding of the mechanical properties of composite rock with a horizontal interlayer.
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