We present a theoretical model to predict the mechanical behavior of an idealized granular material in triaxial compression. Particle motions involve both the average strain of the aggregate and fluctuations. Force and moment equilibrium determine fluctuations in translation and rotation. Two regimes of deformations are considered: at the beginning of the shearing, the aggregate is assumed to behave elastically; then, when sliding between particles first occurs, the incremental contact forces are assumed to be frictionless. Simulations using the discrete element method are carried out and compared to the predictions of the theory.
Constant Pressure Axisymmetric Compression of an Aggregate of Identical, Elastic, Frictional Spheres / LA RAGIONE, Luigi; Magnanimo, V.; Jenkins, J. T.. - 1145:(2009), pp. 1100-1103. (Intervento presentato al convegno Powder and Grains 2009 tenutosi a Golden, Colorado nel 13-17 July 2009) [10.1063/1.3179838].
Constant Pressure Axisymmetric Compression of an Aggregate of Identical, Elastic, Frictional Spheres
LA RAGIONE, Luigi;
2009-01-01
Abstract
We present a theoretical model to predict the mechanical behavior of an idealized granular material in triaxial compression. Particle motions involve both the average strain of the aggregate and fluctuations. Force and moment equilibrium determine fluctuations in translation and rotation. Two regimes of deformations are considered: at the beginning of the shearing, the aggregate is assumed to behave elastically; then, when sliding between particles first occurs, the incremental contact forces are assumed to be frictionless. Simulations using the discrete element method are carried out and compared to the predictions of the theory.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
