Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 87, Issue 9, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.87.094802
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Funding
- Japan Society for the Promotion of Science KAKENHI [JP16H06478]
- Ministry of Education, Culture, Sports, Science and Technology
- Earthquake and Volcano Hazards Observation
- MEXT
- Earthquake Research Institute cooperative research program
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The rheology of cohesive granular materials under a constant pressure condition is studied by performing molecular dynamics simulations. Depending on the shear rate, pressure, and interparticle cohesiveness, the system exhibits four distinctive phases: uniform shear, oscillation, shear-banding, and clustering. The friction coefficient is found to increase with the inertial number, irrespective of the cohesiveness. The friction coefficient becomes larger for strong cohesion. This trend is explained by the anisotropies of the coordination number and angular distribution of the interparticle forces. In particular, we demonstrate that the second-nearest neighbors play a role in the rheology of cohesive systems.
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