Universal Power Law in the Noise from a Crumpled Elastic Sheet

Details Universal Power Law in the Noise from a Crumpled Elastic Sheet Universal Power Law in the Noise from a Crumpled Elastic Sheet

1995-10-17

arxiv.org/abs/cond-mat/9510090v1

Physics

Condensed Matter

5 pages (revtex), 10 uuencoded postscript figures appended, html version at http://rainbow.uchicago.edu/~kramer

Scientific paper

10.1103/PhysRevE.53.1465

Using high-resolution digital recordings, we study the crackling sound emitted from crumpled sheets of mylar as they are strained. These sheets possess many of the qualitative features of traditional disordered systems including frustration and discrete memory. The sound can be resolved into discrete clicks, emitted during rapid changes in the rough conformation of the sheet. Observed click energies range over six orders of magnitude. The measured energy autocorrelation function for the sound is consistent with a stretched exponential C(t) ~ exp(-(t/T)^{b}) with b = .35. The probability distribution of click energies has a power law regime p(E) ~ E^{-a} where a = 1. We find the same power law for a variety of sheet sizes and materials, suggesting that this p(E) is universal.

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