The effect of particle shape on the marginal rigidity state in 2D granular mediaL. Sibille1, T. Mullin2 and P. Poullain1
1 Laboratory GeM, Université de Nantes, CNRS - BP 420, 44606 Saint-Nazaire Cedex, France, EU
2 Manchester Centre for Nonlinear Dynamics, University of Manchester - Oxford Road, Manchester, M13 9PL, UK, EU
received 22 December 2008; accepted in final form 28 April 2009; published May 2009
published online 28 May 2009
Experimental results from an investigation of the assembly of two-dimensional granular piles are presented. Three different particle shapes were used in the investigation of the evolution of piles towards isostatic and isotropic granular assemblies. Good agreement is found with previous experimental results for all particle shapes. We attempt to classify the divergence of a characteristic length-scale of the system as a power law and provide an estimate of the critical exponent. We find that the results are independent of particle shapes and speculate this may be a general feature of two-dimensional convex particles.
45.70.-n - Granular systems.
45.50.-j - Dynamics and kinematics of a particle and a system of particles.
© EPLA 2009