title: Observation of two-wave structure in strongly nonlinear dissipative granular chains.
abstract: In a strongly nonlinear viscous granular chain impacted by a single grain we observe a wave disturbance that consists of two parts exhibiting two time scales of dissipation. Above a critical viscosity there is no separation of the two pulses, and the dissipation and nonlinearity dominate the shocklike attenuating pulse.
authors.affiliation: Departamento de Física, CCEN, Universidade Federal da Paraíba, Caixa Postal 5008, 58059-900 João Pessoa, PB, Brazil.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Rosas
authors.forename: Aldo H
authors.initials: AH
authors.lastname: Romero
authors.forename: Vitali F
authors.initials: VF
authors.lastname: Nesterenko
authors.forename: Katja
authors.initials: K
authors.lastname: Lindenberg