Critical packing in granular shear bands

@article{citeulike:2883644, abstract = {In a realistic three-dimensional setup, we simulate the slow deformation of idealized granular media composed of spheres undergoing an axisymmetric triaxial shear test. We follow the self-organization of the spontaneous strain localization process leading to a shear band and demonstrate the existence of a critical packing density inside this failure zone. The asymptotic criticality arising from the dynamic equilibrium of dilation and compaction is found to be restricted to the shear band, while the density outside of it keeps the memory of the initial packing. The critical density of the shear band depends on friction (and grain geometry) and in the limit of infinite friction it defines a specific packing state, namely the dynamic random loose packing.}, author = {Fazekas, S. and T\"or\"{o}k, J. and Kert\'esz, J. }, citeulike-article-id = {2883644}, doi = {10.1103/PhysRevE.75.011302}, journal = {Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)}, keywords = {2007, cool, density, friction, grains, packing, pre, shear, shearband, simulation, structure}, number = {1}, posted-at = {2008-06-11 20:38:06}, priority = {2}, publisher = {APS}, title = {Critical packing in granular shear bands}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PLEEE8000075000001011302000001\&idtype=cvips\&gifs=yes}, volume = {75}, year = {2007} }

TY - JOUR ID - citeulike:2883644 L3 - citeulike-article-id:2883644 TI - Critical packing in granular shear bands JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) VL - 75 IS - 1 PB - APS N2 - In a realistic three-dimensional setup, we simulate the slow deformation of idealized granular media composed of spheres undergoing an axisymmetric triaxial shear test. We follow the self-organization of the spontaneous strain localization process leading to a shear band and demonstrate the existence of a critical packing density inside this failure zone. The asymptotic criticality arising from the dynamic equilibrium of dilation and compaction is found to be restricted to the shear band, while the density outside of it keeps the memory of the initial packing. The critical density of the shear band depends on friction (and grain geometry) and in the limit of infinite friction it defines a specific packing state, namely the dynamic random loose packing. KW - 2007 KW - cool KW - density KW - friction KW - grains KW - packing KW - pre KW - shear KW - shearband KW - simulation KW - structure AU - Fazekas, S AU - T\"or\"{o}k, J AU - Kert\'esz, J PY - 2007/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLEEE8000075000001011302000001&idtype=cvips&gifs=yes ER -