Details

Autor(en) / Beteiligte

• Albert, I, I
• Tegzes, P
• Kahng, B
• Albert, R
• Sample, JG
• Pfeifer, M
• Barabasi, A
• Vicsek, T
• Schiffer, P

Titel

Jamming and fluctuations in granular drag

Ist Teil von

• Physical review letters, 2000-05, Vol.84 (22), p.5122-5125

Ort / Verlag

United States

Erscheinungsjahr

2000

Quelle

American Physical Society

Beschreibungen/Notizen

• 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.