A Mohr-Coulomb Failure Criterion for Rocks Subjected to Dynamic Loading

摘要

The classical Mohr-Coulomb failure criterion has been extensively used in various rock engineering applications.To investigate the applicability of the Mohr-Coulomb model to dynamic rock failures,I examined in this work the correlation of the three dynamic rock properties:compressive strength,tensile strength and punch shear strength of Longyou sandstone (LS),obtained using a modified split Hopkinson pressure bar (SHPB) system.Considering the loading rate effect of the rock dynamic properties,the three dynamic properties are compared and correlated.The results show that the famous Mohr-Coulomb criterion can be extended to the dynamic range,given proper conversion of the loading rate.