¥Packed, frictionless
particles are solid, but qualitatively different from elastic solids.
¥Distinctive features
can be explained by a single property: isostaticity
–ray-like force
propagation
–marginal
vibrational modes
¥randomized square
lattice reproduces properties of particle packs
–details of the
packing process seem unimportant
¥How are particle packs
distinct from general isostatic networks?
–eg. reconnection
of network from stress
¥
–