Journal
INTERNATIONAL JOURNAL OF GEOMECHANICS
Volume 21, Issue 5, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GM.1943-5622.0001987
Keywords
Plasticity; Constitutive model; Particle breakage; Critical state; State parameter; Dilatancy
Categories
Funding
- National Natural Science Foundation of China [51922024, 41831282, 51978104, 51678094]
- Natural Science Foundation of Chongqing, China [cstc2019jcyjjqX0014]
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Particle breakage is a typical characteristic of crushable granular soil under high pressure, which significantly affects its stress-strain behaviors. The downward shift of the critical state line in the compression plane caused by particle breakage is depicted by a breakage-dependent critical state plane, and pressure-dependent plastic modulus parameters are introduced to capture the influence of high pressure on particle breakage.
Particle breakage is a typical characteristic of crushable granular soil under high pressure, which has great effects on its stress-strain behaviors. The phenomenon of the critical state line (CSL) shifting downward in the compression plane caused by particle breakage was depicted by a breakage-dependent critical state plane (BCSP). Particle breakage was incorporated into a void ratio-pressure state parameter to modify Rowe's stress-dilatancy equation, and then, the state parameter was incorporated into the bounding stress ratio and plastic modulus. Due to the impact of high pressure on particle breakage, the pressure-dependent plastic modulus parameters were introduced. A breakage-dependent bounding surface plasticity model was proposed to capture the influence of particle breakage on the state-dependent stress-strain behaviors for silica and coral sands, and the transition of complex breakage-dependent critical states resulted from the competition between the contraction due to particle breakage and the dilatancy due to particle rearrangement.
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