Progressive Failure and Acoustic Emission Characteristics of Red Sandstone with Different Geometry Parallel Cracks under Uniaxial Compression Loading

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Parameter</td><td class="align_center">Value</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Specimen size (<i>H</i>×<i>D)</i> (mm)</td><td class="align_center">50×100</td></tr><tr><td class="align_left">Particle diameter ratio (<i>R</i><sub>min</sub>/<i>R</i><sub>max)</sub></td><td class="align_center">1</td></tr><tr><td class="align_left">Stiffness ratio</td><td class="align_center">1</td></tr><tr><td class="align_left">Contact modulus of the particle (GPa)</td><td class="align_center">1.60</td></tr><tr><td class="align_left">Parallel bond deformation modulus (GPa)</td><td class="align_center">1.60</td></tr><tr><td class="align_left">Density <i>ρ</i>/Kg m<sup>3</sup></td><td class="align_center">2500</td></tr><tr><td class="align_left">Coefficient of friction</td><td class="align_center">0.15</td></tr><tr><td class="align_left">Particle contact damping</td><td class="align_center">0.2</td></tr><tr><td class="align_left">Bonding tensile strength/MPa</td><td class="align_center">3.24</td></tr><tr><td class="align_left">Parallel bond stiffness ratio</td><td class="align_center">1</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Physico-mechanical parameters of red sandstone specimens.</div>

Advances in Materials Science and Engineering

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Table 4

Table 4: Progressive Failure and Acoustic Emission Characteristics of Red Sandstone with Different Geometry Parallel Cracks under Uniaxial Compression Loading 

Table 4 | Progressive Failure and Acoustic Emission Characteristics of Red Sandstone with Different Geometry Parallel Cracks under Uniaxial Compression Loading 