Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
1999-12-17
Phys. Rev. Lett. 84, 5122-5125 (2000)
Physics
Condensed Matter
Disordered Systems and Neural Networks
7 pages, 4 figures, RevTeX
Scientific paper
10.1103/PhysRevLett.84.5122
We investigate the dynamic evolution of jamming in granular media through fluctuations in the granular drag force. The successive collapse and formation of jammed states give a stick-slip nature to the fluctuations which is independent of the contact surface between the grains and the dragged object -- thus implying that the stress-induced collapse is nucleated in the bulk of the granular sample. We also find that while the fluctuations are periodic at small depths, they become "stepped" at large depths, a transition which we interpret as a consequence of the long-range nature of the force chains.
Albert Istvan
Albert Reka
Barabasi Albert-László
Kahng Byungnam
Pfeifer Miroslav
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