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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Support by National Natural Science Foundation of China (No. 51575529) is acknowledged.
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Huijie ZHANG. She received her bachelor degree in mechanical engineering and automation in 2015 from China University of Petroleum–Beijing, China. After then, she was PhD student in mechanical engineering at the same university. Her research interests include water-based lubrication and wear mechanism.
Shuhai LIU. He received his PhD degree in mechanical engineering in 2009 from Tsinghua University, Beijing, China. He joined the College of Mechanical and Transportation Engineering at China University of Petroleum–Beijing from 2009. His current position is a Professor and the Assistant Dean of the College. His research interests include tribology, surface science, and petroleum science.
Huaping XIAO. He received his bachelor degree in 2006 from Tianjin University, Tianjin, China and master degree in 2011 from Tsinghua University, Beijing, China. He has earned PhD degree in mechanical engineering in 2014 from Texas A&M University (TAMU), USA. He joined the College of Mechanical and Transportation Engineering at China University of Petroleum from 2014. His current position is an Associate Professor. His research areas include tribology properties and wear behaviors under complicated work condition and bio-related tribological systems.
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Zhang, H., Liu, S. & Xiao, H. Sliding friction of shale rock on dry quartz sand particles. Friction 7, 307–315 (2019). https://doi.org/10.1007/s40544-018-0213-y
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DOI: https://doi.org/10.1007/s40544-018-0213-y