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      Sliding friction of shale rock on dry quartz sand particles

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          Abstract

          The sliding friction of rock, involving all kinds of particles at the contact surface, is relevant to many problems, ranging from those in artificial engineering to earthquake dynamics. In this work, the frictional performance of the shale rock–dry quartz sand contact was investigated using a self-developed testing device. The study showed that the coefficient of friction of the contact increases with nominal stress and that the corresponding friction force increases approximately linearly with nominal stress, which is directly related to the contact stress between each single sand particle and rock shale. An overall dynamic coefficient, γ, reflecting the response of friction force to nominal stress, first decreases and then increases with area ratio, which is determined by not only the contact stress but also the interparticle friction force. These have important repercussions for a preliminary understanding of the frictional properties of the shale rock–dry quartz sand contact in hydraulic fracturing and related industrial applications.

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          Author and article information

          Contributors
          Journal
          Friction
          Friction
          Tsinghua University Press (Beijing/Hong Kong )
          2223-7704
          2223-7690
          01 August 2019
          01 October 2019
          : 7
          : 4
          : 307-315
          Affiliations
          1College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, China
          2State Key Laboratory of Oil and Gas Resources and Engineering, China University of Petroleum-Beijing, Beijing 102249, China
          Author notes
          *Corresponding authors: Shuhai LIU, E-mail: liu_shu_hai@ 123456163.com ; Huaping XIAO, E-mail: hxiao@ 123456cup.edu.cn
          Article
          s40544-018-0213-y
          10.1007/s40544-018-0213-y
          Copyright © Journals of Tsinghua University Press

          This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 Unported License (CC BY-NC 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See https://creativecommons.org/licenses/by-nc/4.0/.

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