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Published September 8, 2010 | Erratum + Published
Journal Article Open

Highly nonlinear pulse splitting and recombination in a two-dimensional granular network


The propagation of highly nonlinear signals in a branched two-dimensional granular system was investigated experimentally and numerically for a system composed of chains of spherical beads of different materials. The system studied consists of a double Y-shaped guide in which high- and low-modulus/mass chains of spheres are arranged in various geometries. We observed the transformation of a single or a train of solitary pulses crossing the interface between branches. We report fast splitting of the initial pulse, rapid chaotization of the signal and impulse redirection and bending. Pulse and energy trapping was also observed in the branches. Numerical analysis based on Hertzian interaction between the particles and the side walls of the guide was found in agreement with the experimental data, except for nonsymmetric arrangements of particles excited by a large mass striker.

Additional Information

© 2010 The American Physical Society. Received 11 March 2009; revised manuscript received 10 June 2010; published 8 September 2010; publisher error corrected 20 September 2010. C.D. acknowledges support from the Army Research Office (MURI grant U.S. ARO Grant No. W911NF-09-1-0436, Dr. David Stepp and Proposal No. 54272-EG, Dr. Bruce LaMattina). F.F. greatly acknowledges the support of the University Centre for Risk Prediction and Prevention (CUGRI), associating the Universities of Salerno and Napoli "Federico II," Italy. F.F. also thanks the Graduate Aerospace Laboratory at Caltech (GALCIT) for hospitality during his visit.

Attached Files

Published - Daraio2010p11411Phys_Rev_E.pdf

Erratum - PhysRevE.82.039905_1_.pdf


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