Research on Microscopic Evolution Laws of Sandstone Deformation and Failure Based on the Particle Discrete Element Method

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Microscopic parameters</td><td class="align_center">Values</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Ball density ρ (kg/cm3)</td><td class="align_center">2430</td></tr><tr><td class="align_left">Minimum ball radius Rmin (mm)</td><td class="align_center">1.5</td></tr><tr><td class="align_left">Ball size ratio Rmax/Rmin</td><td class="align_center">1.5</td></tr><tr><td class="align_left">Ball-ball contact modulus Ec (GPa)</td><td class="align_center">18 ± 10</td></tr><tr><td class="align_left">Particle stiffness ratio kn/ks</td><td class="align_center">2.5</td></tr><tr><td class="align_left">Parallel-bond modulus Ec (GPa)</td><td class="align_center">18 ± 10</td></tr><tr><td class="align_left">Parallel-bond normal strength σn (MPa)</td><td class="align_center">57 ± 20</td></tr><tr><td class="align_left">Particle friction coefficient μ</td><td class="align_center">0.5</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Microscopic parameters of the sandstone numerical model.</div>

Mathematical Problems in Engineering

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Table 1

Table 1: Research on Microscopic Evolution Laws of Sandstone Deformation and Failure Based on the Particle Discrete Element Method 