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March 13, 2026International Journal of Geomechanics

Mesoscopic Shear Behavior of Unsaturated Rough Joints under Constant Normal Stiffness Boundary Conditions

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Authors

TFTeng-Fei FuDZDefu ZhuYLYatao Li

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Overview

Numerical analysis investigates shear characteristics of rough joints in sandstone, indicating enhanced behavior under specific conditions.

Key Points

  • This research aims to understand the shear behavior of unsaturated rough joints in sandstone under constant normal stiffness conditions.
  • Developed a discrete-element model using Voronoi grain-based techniques.
  • Incorporated variable grain diameters to improve computational efficiency.
  • Applied generalized effective stress theory to assess direct shear behavior.
  • Conducted calibration to optimize parameters related to grain contact and capillary pressure.
  • Shear stress–shear displacement curves displayed significant hardening and suppressed shear dilation.
  • Peak parameters (normal displacement, shear strength, shear displacement) exceeded those observed under constant normal load conditions.
  • Tensile microcracks were the predominant failure mode during shear deformation.
  • Normal displacement exhibited a negative correlation with initial normal stress.

Cite This Study

Fu et al. (2026) studied this question.

synapsesocial.com/papers/69b3ace502a1e69014ccefd6https://doi.org/10.1061/ijgnai.gmeng-12982
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