Kadau, Dirk; Schwesig, Dominik; Theuerkauf, Jörg; Wolf, Dietrich:

Influence of particle elasticity in shear testers

In: Granular matter, Jg. 8 (2006) ; Nr. 1, S. 35-40
ISSN: 1434-7636, 1434-5021
Zeitschriftenaufsatz / Fach: Physik
Two dimensional simulations of non-cohesive
granular matter in a biaxial shear tester are discussed. The
effect of particle elasticity on the mechanical behavior is
investigated using two complementary distinct element methods
(DEM): Soft particle molecular dynamics simulations
(Particle Flow Code, PFC) for elastic particles and contact
dynamics simulations (CD) for the limit of perfectly rigid
particles. As soon as the system dilates to form shear bands,
it relaxes the elastic strains so that one finds the same stresses
for rigid respectively elastic particles in steady state flow. The
principal stresses in steady state flow are determined. They
are proportional to each other, giving rise to an effective macroscopic
friction coefficient which is about 10% smaller than
the microscopic friction coefficient between the grains.