Journal
GRANULAR MATTER
Volume 10, Issue 1, Pages 13-20Publisher
SPRINGER
DOI: 10.1007/s10035-007-0054-2
Keywords
one-dimensional granular chain; solitary wave; stepped chain; pulses train formation
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The features of solitary waves observed in horizontal monodisperse chain of barely touching beads not only depend on geometrical and material properties of the beads but also on the initial perturbation provided at the edge of the chain. An impact of a large striker on a monodisperse chain, and similarly a sharp decrease of bead radius in a stepped chain, generates a solitary wave train containing many single solitary waves ordered by decreasing amplitudes. We find, by simple analytical arguments, that the unloading of compression force at the chain edge has a nearly exponential decrease. The characteristic time is mainly a function involving the grains' masses and the striker mass. Numerical calculations and experiments corroborate these findings.
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