2016/03/23 by Ishan Srivastava, Srivastava, Ishan, Timothy S. Fisher +1
Engineering · Environmental Science · #FOS: Physical sciences #Geotechnical and Geomechanical Engineering #Granular flow and fluidized beds #Landslides and related hazards #Soft Condensed Matter (cond-mat.soft)
paper · pdf · doi:10.48550/arxiv.1603.07403
openalex publication_date 2016/03/23 · openalex created_date 2022/09/03 · openalex updated_date 2026/07/28
Creep mechanisms in uniaxially compressed 3D granular solids comprised of\nfaceted frictionless grains are studied numerically using a constant pressure\nand constant stress simulation method. Rapid uniaxial compression followed by\nslow dilation is predicted on the basis of a logarithmic creep phenomenon.\nMicromechanical analysis indicates the existence of a correlation between\ngranular creep and grain-scale deformations. Localized regions of large strain\nappear during creep and grow in magnitude and size with time. Furthermore, the\naccumulation of non-affine granular displacements increases linearly with local\nstrain, thereby providing insights into the origins of plastic dissipation\nduring stress-driven creep evolution. The prediction of slow logarithmic\ndynamics in the absence of friction indicates a universality in the role of\nplastic dissipation during the creep of granular solids.\n