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Volume 39 Issue 3
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ZHANG Kun-yong, LI Wei, LUO Xing-jun, CHARKLEY Nai Frederick. Numerical experiments of microscopic mechanism of inherent anisotropy for sand based on PFC2D[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3): 518-524. DOI: 10.11779/CJGE201703016
Citation: ZHANG Kun-yong, LI Wei, LUO Xing-jun, CHARKLEY Nai Frederick. Numerical experiments of microscopic mechanism of inherent anisotropy for sand based on PFC2D[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3): 518-524. DOI: 10.11779/CJGE201703016
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Numerical experiments of microscopic mechanism of inherent anisotropy for sand based on PFC2D

  • 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
    2. Jiangsu Research Center for Geotechnical Engineering Technology (Hohai University), Nanjing 210098, China;
    3. China Southwest Geotechnical Investigation and Design Institute Co., Ltd., Chengdu 610084, China

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  • Received Date: January 04, 2016
  • Published Date: April 24, 2017
    Graphical Abstract
    • Abstract
  • Through numerical simulation based on the particle flow method, DEM numerical test samples are generated in accordance with the results of laboratory tests on standard sand. Using gravity deposition modelling of irregular sand particles, samples of biaxial test assembled by long particle units are generated. Different steps of deposition are applied during the process of generating samples in order to simulate different inherent states of samples. The loads from the horizontal and vertical directions are respectively applied to samples. The numerical experimental results show that the gravitational deposits have significant impact on the major axis orientation arrangement of particles and the average coordination number. Also, there is a change in the macroscopic stress-strain curve and mechanical parameters acquired from the results of applying loads to the samples from the horizontal and vertical directions. The tested sand samples exhibit inherent mechanical anisotropy, which is closely associated with the internal structure properties and microscopic mechanical properties of sand.
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    • References (16)
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