Jamming Transition
Force Chain Networks · Granular Packing · J-Point Criticality
Packing Controls
Packing fraction φ:
0.82
Particles N:
80
Polydispersity σ:
0.20
Force threshold:
0.5
New Packing
Relax
Jamming J-point: φJ ≈ 0.64 (random close packing, monodisperse)
Below φJ: fluid — no force chains
Above φJ: jammed solid — force chains span system
Force chains: anisotropic, heterogeneous stress transmission
Width ∝ 1/√(φ−φJ) diverges at J-point