Volume 38 Issue 5
Oct.  2024
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Ou Fanyi, Fei Jianbo, Ma Weibin, Chen Xiangsheng. Influence of Loading Conditions and Particle Size on Stick-Slip Characteristics of Granular Materials[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(5): 592-597. doi: 10.3969/j.issn.1007-2993.2024.05.014
Citation: Ou Fanyi, Fei Jianbo, Ma Weibin, Chen Xiangsheng. Influence of Loading Conditions and Particle Size on Stick-Slip Characteristics of Granular Materials[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(5): 592-597. doi: 10.3969/j.issn.1007-2993.2024.05.014

Influence of Loading Conditions and Particle Size on Stick-Slip Characteristics of Granular Materials

doi: 10.3969/j.issn.1007-2993.2024.05.014
  • Received Date: 2023-10-11
  • Accepted Date: 2024-03-11
  • Rev Recd Date: 2024-02-22
  • Available Online: 2024-10-09
  • Publish Date: 2024-10-09
  • Combining the common bonding slip phenomena in natural faults with the characteristics of granular materials, indoor direct shear tests and discrete element numerical analysis using glass bead particles were conducted. By changing the normal stress, shear rate, and particle size, the influence of loading conditions and particle size on the stick-slip characteristics of granular materials were investigated. Model experiments and numerical simulations indicate that glass bead particles exhibit periodic stick-slip under shear conditions, and the frictional healing and stick-slip period are key parameters characterizing the stick-slip characteristics of particles. The frictional healing decreases with increasing shear rate and increases with increasing particle diameter, while the normal stress has a smaller impact on the frictional healing. Stick-slip period and frictional healing show a positive correlation, with the stick-slip period significantly decreasing with increasing shear rate. The frictional interlocking between particles is an important factor influencing stick-slip behavior.

     

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