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| Titel |
Power law statistics of force and acoustic emission from a slowly penetrated granular bed |
| VerfasserIn |
K. Matsuyama, H. Katsuragi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 21, no. 1 ; Nr. 21, no. 1 (2014-01-03), S.1-8 |
| Datensatznummer |
250120870
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| Publikation (Nr.) |
 copernicus.org/npg-21-1-2014.pdf |
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| Zusammenfassung |
| Penetration-resistant force and acoustic emission (AE) from a plunged
granular bed are experimentally investigated through their power law
distribution forms. An AE sensor is buried in a glass bead bed. Then, the bed
is slowly penetrated by a solid sphere. During the penetration, the resistant
force exerted on the sphere and the AE signal are measured. The resistant
force shows power law relation to the penetration depth. The power law
exponent is independent of the penetration speed, while it seems to depend on
the container's size. For the AE signal, we find that the size distribution
of AE events obeys power laws. The power law exponent depends on grain size.
Using the energy scaling, the experimentally observed power law exponents are
discussed and compared to the Gutenberg–Richter (GR) law. |
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