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Random Multiplicative Response Functions In Granular Contact Networks

Author

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  • CRISTIAN F. MOUKARZEL

    (CINVESTAV del IPN, Unidad Mérida, AP 73 Cordemex, 97310 Mérida, Yucatán, Mexico)

Abstract

The contact network of a frictionless polydisperse granular packing is isostatic in the limit of low applied pressure. It is argued here that, on disordered isostatic networks, displacement–displacement and stress–stress static Green functions are described by random multiplicative processes and have a truncated power-law distribution, with a cut-off that grows exponentially with distance. If the external pressure is increased sufficiently, excess contacts are created, the packing becomes hyperstatic, and the abovementioned anomalous properties disappear because Green functions now have a bounded distribution. Thus, the low-pressure, isostatic, limit is acritical point.

Suggested Citation

  • Cristian F. Moukarzel, 2001. "Random Multiplicative Response Functions In Granular Contact Networks," Advances in Complex Systems (ACS), World Scientific Publishing Co. Pte. Ltd., vol. 4(04), pages 523-533.
  • Handle: RePEc:wsi:acsxxx:v:04:y:2001:i:04:n:s0219525901000334
    DOI: 10.1142/S0219525901000334
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