Evolution of Frictional Strength of Dry Sheared Granular Porous Media During Slip-Rate Weakening

Evolution of Frictional Strength of Dry Sheared Granular Porous Media During Slip-Rate Weakening

Sahar Bakhshian, Muhammad Sahimi

It is generally believed that earthquakes occur when faults weaken with increasing slip rates. It has been hypothesized that the weakening phenomenon during fault slip may be activated by thermal pressurization of pores’ fluid and flash heating. Flash heating was incorporated into the DEM simulations so as to study the variations of the local friction coefficients between the particles, as well the evolution of the frictional strength, induced by slip-rate weakening. It is shown that at relatively high velocities the effect of frictional weakening on the frictional strength of the medium is nontrivial. As strain increases, the … (full read)

InterPore Journal, 1(2), ipj240824–5 (2024)

Corresponding Author: Muhammad Sahimi

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