2026-04-13T03:56:03Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1891162025-07-16T23:11:50Zcom_2072_1033col_2072_452949

00925njm 22002777a 4500 dc Imole, O.I. author Kumar, N. author Luding, S. author 2011 Findings from experiments and particle simulations for dry and cohesive granular materials are presented with the goal to reach quantitative agreement between simulations and experiments. Results for the compressibility, tested with the FT4 Powder Rheometer are presented. The first simulation results involve the strain controlled uniaxial compression of frictionless polydisperse spheres in a biaxial box using a linear visco-elastic contact model. As main result, the evolution of pressure as a function of volume fraction is reported. Our anisotropic, uniaxial findings compare astonishingly well with results for purely isotropic compression. Concerning the second stress response, namely anisotropy, we present the evolution of the deviatoric stress as a function of the volume fraction, which cannot be measured with the FT4 experiment, but requires a bi-axial experiment. Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits Finite element method Computational methods in mechanics Particle methods (Numerical analysis) DEM, Element tests, Contact Models, Cohesive Powders, Uniaxial Compression, deviatoric stress Elements finits, Mètode dels Element test experiments and simulations: from dry towards cohesive powders