Jamming, Force Chains and Fragile Matter

Abstract

We consider materials whose mechanical integrity is the result of a jamming process. We argue that such media are generically "fragile": unable to support certain types of incremental loading without plastic rearrangement. Fragility is linked to the marginal stability of force chain networks within the material. Such ideas may be relevant to jammed colloids and poured sand. The crossover from fragile (when particles are rigid) to elastoplastic behavior is explored.

4 pages, 3 .eps figures. Submitted to Phys. Rev. Lett

References in corpus (1)

• Models of stress fluctuations in granular media

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